2017 Phosphor Global Summit Agenda

The 2017 program agenda focused on the latest innovations in the phosphors industry and market needs for the future. Representatives from Current powered by GE, Philips Lighting Research, Nichia and more presented.

View the full 2017 agenda below

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Monday, March 13, 2017

Registration & Welcome

  1. Registration Opens & Welcome Coffee

  2. Opening Remarks from the Conference Organizer

Future of Lighting

The worldwide lighting market is going to be dominated by LEDs due to their superior properties compared to traditional lighting technologies, viz. incandescent and discharge lamps. Therefore, a strong increase of their market share has been observed recently. However, some obstacles for placing the right lighting products in different markets still exist and must be overcome. The opportunities and the winning strategies for tomorrow's lighting products will be part of this session.

Session Chairs:  Dr. Morgan Pattison, US DOE Solid State Lighting Program, USA

                            Dr. Ingo Koehler, Director, Merck KGaA, Darmstadt, Germany

  1. Lighting Now and Beyond – Challenges in Phosphor Technology

    René Wegh | R&D Project Manager and Principal Scientist of Philips Lighting Research

    The transformation in the lighting industry from conventional technology to LED is occurring rapidly as we speak. For most general lighting applications, LED has reached and even surpassed the performance in flux and efficacy of conventional solutions, and also the price points are becoming favorable. But the transformation of lighting will continue; in the next phase applications will be targeted which will go beyond just light, such as connected lighting but also improved quality of light. Also, there are still high flux applications which are not yet possible with LED, and there is still a luminous efficacy step up to make by improving the spectrum. These applications will all impose specific requirements to phosphors and materials yet to be fulfilled. These challenges for phosphor technology will be pointed out in this lecture.

  2. Color Quality Considerations for Residential Street Lighting

    Eric Haugaard | Director of Product Technology of Cree Lighting

    For several decades High Pressure Sodium Light Sources have dominated municipal street lighting applications. Although transitions to LED solutions continues to accelerate, not all implementations have been seen as an overall improvement, to the residents of the neighborhoods and business districts. Meanwhile, the variety of physical and medical opinions on the possible positive and negative effects of street lighting has never been greater, stalling many of the implementation plans.

  3. Opportunities for Light Emitting Diodes in the Era of Spectral Engineering

    Dr. Marie Anne van de Haar | Project Manager of Seaborough Research

    As gallium-nitride based LEDs begin to plateau in performance due to the limitations imposed by Auger recombination in the current device configurations, focus for enhancements at the application level is increasingly shifting to down-conversion materials which primarily determine the final emission spectrum.  With new such materials (both phosphor and quantum dots) on the horizon, exciting new opportunities present themselves, along with very real challenges.  This talk will discuss several of these areas, focusing on application to general illumination and flat-panel displays.

  4. Developments in Narrow Line Emitters for LEDs

    William Beers, Ph.D. | DFSS Black Belt / Senior System Engineer of Current, powered by GE

    This presentation will focus on narrow red phosphors as well as spectral properties, emission decay lifetimes, and thermal and environmental stability.

  5. Networking Break & Student Poster Session in Exhibit Hall

    Student Poster Competition Sponsored by EMD Performance Materials

LED Phosphors

This session will give an update on LED phosphors and on challenges remaining for further R&D activities aiming at novel business case as inorganic luminescent materials play a key role with respect to efficacy, lifetime and color rendering of color converted LEDs. To be aware of the present R&D trends concerning LED phosphors is essential for SSL manufacturers worldwide, as to acquire the most recent insights towards novel application areas of LED phosphors.

Session Chairs:    Prof. Dr. Thomas Jüstel, University of Applied Sciences Münster, Germany

               Dr. Alok M. Srivastava, GE Global Research, USA

  1. Phosphors in Projection – The Good, the Bad and the Ugly

    Mihaela Tarpan, Expert Research Engineer, Barco

    Staring from 2010 when Casio unveiled the first laser-phosphor consumer projector we see more and more manufacturers announcing their own “flavor” for such a light source with Barco and the competition pushing for always brighter and better products. However achieving high brightness and very good color performance is not at all trivial and it is the purpose of this presentation to discuss “The Good, the Bad and the Ugly” of using phosphor convertors in solid state light sources for projectors

  2. A New Group of Phosphors for General Lighting

    Dr. Aleksander Zych | Research Scientist Lighting | Lab Manager Lighting of Merck KGaA

    To leverage the LED-based general lighting to its upmost potential, we need to turn away from the blue LED towards the violet one, which brings great benefits compared to its blue counterpart.  These benefits will be addressed in the presentation.  Furthermore, to make this happen, there is a need of new phosphors to be developed.  We share here our exciting new phosphor materials that not only make the best out of their combination with a violet chip but also allow for simplified process to be applied in the manufacturing step of final LEDs. 

  3. Nitride Phosphors

    Dr. Nerine Cherepy | Research Scientist of Lawrence Livermore National Laboratory

    Nitride phosphor development has accelerated over the past 10 years.  Europium-doped nitrides for phosphor-converted white light LEDs offer excellent efficiency, though they are relatively more costly than the standard garnet phosphors.  Narrow-band green- and red-emitting phosphors for LED lighting remain elusive, though many candidates remain unexplored, such as Yb2+ and Bi2+ activated nitrides.  Once high-performing candidates are identified, low-cost synthetic methods for phase-pure, high-efficiency nitrides are needed for economic implementation.  Nitride phosphors in fluorescent lighting have been found to offer good lumen maintenance and have the potential to substitute into the rare-earth-intensive tri-phosphor blend, such AlN:Mn for the red phosphor, Y2O3:Eu.  This presentation will describe our recent work on nitride phosphor exploration and synthesis optimization for solid-state and fluorescent lighting.

  4. The Worlds First Ultra High CRI LED

    Dr. Sadakazu Wakui | Engineer of LED Back-End Material Engineering Department of Nichia

    Nichia has developed Ultra-high color rendering LEDs with all R values(R1 through R15) greater than 90 using blue chips and phosphors. The advantage of using blue chips is that the LED does not emit UV radiation.  Nichia will demonstrate how a high R12 value (strong blue) is realized, which is regarded to be difficult to improve. Nichia will also indicate the difference in vision between Ultra-high CRI and Ra>=80 and explain which market needs the such Ultra-high CRI.

  5. Closing Remarks

  6. Opening Networking Reception

Tuesday, March 14, 2017

Registration & Welcome

  1. Hot Breakfast in the Exhibit Hall

  2. Opening Remarks

Phosphor Material Design Consideration

Luminescent materials are mostly derived from inorganic solid state compounds, which are typically doped by one or several metal ions, which act as activators and/or sensitizers. Detailed knowledge on the properties (size and symmetry of suitable crystallographic metal sites, band gap, phonon spectrum) of the host, on the energy level diagram of the dopants, on the interaction between the dopants and the host, as well as on energy transfer and quenching processes is a must to successful R&D on novel phosphors. New insights important for the design of luminescent compositions will be presented in this session.

Session Chairs:    Dr. Morgan Pattison, US DOE Solid State Lighting Program, USA

                Dr. Ingo Koehler, Merck KGaA, Darmstadt, Germany

  1. Discovery of Phosphors for Light Emitting Diode Applications Using Metaheuristics Computation

    Kee-Sun Sohn | Prof., Faculty of Nanotechnology and Advanced Materials Engineering of Sejong University

    Heuristics optimization (metaheuristics) strategies, such as elitism-involved non-dominated sorting genetic algorithm (NSGA-II) and particle swarm optimization (PSO) have proven to be versatile in various research areas. In this regard, we have used them in the discovery of materials, the crystal structure of which exist in none of the existing structure types listed in the Inorganic Crystal Structure Database (ICSD). In particular, the metaheuristics was coupled with high-throughput experimentation (HTE) in such a manner that the experimental evaluation of fitness functions for the NSGA-II and PSO is accomplished by the HTE, and thereby discovered several novel phosphors for use in LED applications

  2. Challenges and Chances for Phosphors in Existing and New Applications

    Dr. Kirstin Petersen | Senior Manager / Phosphors (Material Innovation) of OSRAM Opto Semiconductors GmbH

    Currently used phosphors like garnets and nitrides are well-established for more than a decade. However, there are limitations of these systems and the constant challenge to improve pc-LEDs in respect to performance, endurance and expense drives the search for new materials and features. New requirements, new applications and also new phosphors amplify the scope for LED development. What is new and what do we need for the future?

  3. New High Intensity YAG: Ce Phosphor Material with Narrow Band Red Color

    Vladimir Krstic, Professor, Queen's University

    This presentation describes the properties and performance of a new generation of composite YAG:Ce phosphor with greatly enhanced emission of red color with a spectral emission at 620nm. The major advantage of this new phosphor material is that it preserves all good properties of YAG:Ce such as broadband emission, efficient absorption of blue light and excellent chemical and thermal stability.

  4. Networking Break & Student Poster Session in Exhibit Hall

    Student Poster Session Sponsored by EMD Performance Materials

  5. Discovery and Characterization of Novel Solid State Materials for LEDs

    Dr. Hubert Huppertz | Univ.-Prof. of Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Austria

    The discovery of new solid state compounds with interesting luminescence properties is often coined by an explorative basic approach in different chemical systems. In the past, our research interests were dedicated to a variety of substance classes like borates, fluoride-borates, boro-germanates, boro-gallates, gallates, borate-nitrates, gallium-oxonitrides, molybdates, phosphates, and also nitrides, which were intensively investigated under ambient and high-pressure conditions. The main focus of these investigations was laid on structural aspects. We now started to have a close look on several of these compounds concerning their luminescence properties, which can be originated intrinsically or extrinsically (by doping). Therefore, this presentation will give an overview of our recent activities in the syntheses of novel phosphor materials in different chemical systems.

  6. High-throughput screening of novel phosphors using laboratory scale reaction apparatus

    Kenji Toda | Research Professor of Niigata University, Japan

    In order to synthesize novel phosphor materials, we have applied two novel synthesis techniques "Melt quenching method" and "Water assisted solid state reaction" rather than the conventional solid state reaction technique.

    In the melt synthesis, the mixture of raw materials is melted in a short period of time 5 (seconds) by a strong light radiation in arc imaging furnace.

    A spherical molten sample with multiple cations were mixed homogeneously and directly solidified on a Cu hearth.

    Water assisted solid state reaction is very simple and can synthesize the ceramic materials just by mixing of raw materials added a small amount of water. We can successfully synthesize many nano-sized phosphors between room temperature to 500 K.

    These synthesis techniques are powerful tools for rapid screening of new phosphor materials.

  7. The Use of Phosphor Markers in Plastic Packaging Recycling using Intelligent Separation technologies for Materials (Results from the PRISM project)

    Professor Jack Silver | Professor of Brunel University London

    The sorting of plastic articles and bottles is achieved currently by using near infrared spectroscopy, however but this cannot identify all material types (opaque polymer bottles can be a problem particularly black ones) and whether for example an article is food-grade or not.  The objective of this work is to develop phosphor based luminescent codes that can be printed onto plastic articles/bottles in some way that identify both the material and also their last use in high speed sorting equipment. The talk would cover history, background, approach, drawbacks, current level of attainment and some film of the system working on polymer bottles on a real recycling line. Trials of phosphor coded labels have been successfully carried out at a commercial sorting plant by the consortium partners. The trials have used both organic and inorganic phosphors.  The environmental stability of the organic materials, however, was observed to be disappointing due to their degradation under UV light in the solar spectrum, and both present and future work will concentrate on the inorganic phosphors.  The signal levels measured appear to be quite strongly, inversely, related to particle size, hence small particle size material is desirable. Placing a reflective background behind the phosphor containing ink more than doubled the observed signals.

  8. Networking Lunch

LED Converters: Traditional Phosphors & Advanced/Alternative Approaches

Typical LED-phosphor systems work very well in general purpose applications but there are areas where they could be improved.  For more specialized lighting applications, such high or low brightness applications, phosphor designed for the specific operating regime could be developed.  Narrow red phosphors can reduce the trade-offs between color quality and efficacy.  And narrow green phosphors could enable improved spectral tuning for a higher degree of spectral flexibility to address new lighting applications.

Session Chairs:  Dr. Madis Raukas, RD Manager- Materials, Corporate Innovation, OSRAM SYLVANIA, USA

                          Prof. Dr. Thomas Jüstel, University of Applied Sciences Münster, Germany          

  1. Computation Approaches to Red Line Emitters

    Mikhail G. Brik | Professor of Institute of Physics, University of Tartu

    The phosphors emitting red light are getting more and more attention in the recent years, which is due to various applications, one of the most important of which is related to white LEDs. Several semi-empirical and first-principles methods of calculations of the electronic and optical properties of phosphors containing the Mn4+, Eu3+ and Sm3+ ions will be discussed in this presentation. Systematic analysis of the obtained results allowed for identifying several trends across the considered compounds depending on the structure of the host materials, local symmetry of the dopant sites, and chemical bonds properties; in addition, some practical advices on how to get red emission at a desired wavelength are suggested.

  2. Measuring Forward Fluorescence in Remote Phosphors used in LED Luminaires: A Path to Reproducible Measurements

    Clarence J. Zarobila | Physicist, Sensor Science Division, Remote Sensing Group of National Institute of Standards and Technology

    Fluorescence in remote phosphors used in luminaires for Solid State Lighting (SSL) products is typically measured using integrating spheres. Widely varying results for their quantum yield have been found, thought to be due to optical feedback of the pump wavelength by the sphere to the phosphor. A few remote phosphor samples have been measured with two integrating spheres, and also with a robot goniometer in a directional-directional configuration. Measurements using the goniometer yield a BTDF free from feedback, and with certain assumptions, can be used to relate the effective quantum efficiency when measuring with a sphere to a baseline quantum efficiency when measuring with a goniometer. The relationship opens up the possibility of 1) providing protocols for measurement that will lead to reproducible results when measuring quantum efficiency, and 2) the issuance of calibrated fluorescent standards to assist the solid-state lighting community in the application of LM-86.

Ceramics, Glass and Single Crystals and Scintillators

In many applications, the operating conditions (for example high temperature and/or intensity of exciting flux) and light output requirements (often high luminance, or path length in scintillation detectors) dictate specific criteria for phosphor robustness and optical properties.  Processing of luminescent powders into ceramic, glass or single crystal form of exactly desired characteristics is one of the most challenging tasks when creating light converters in such applications.  Ceramic, glass and single crystal scintillator and solid state laser gain materials have been under investigation for many years. More recently, boom of various LED and LD based lighting applications has advanced the materials technology significantly and new insights into luminescence properties are perpetually appearing.

Session Chairs:  Prof. Dr. Thomas Jüstel, University of Applied Sciences Münster, Germany

            Dr. Madis Raukas, RD Manager- Materials, Corporate Innovation, OSRAM SYLVANIA 

  1. Recent Progress of Phosphor and Phosphor Ceramic Composites for LED Applications

    Dr. Hiroaki Sakuta | Manager, LED Materials Department of Mitsubishi Chemical Corporation

    Recent progress of phosphor and phosphor ceramic composites for LED applications will be presented. Increasing demands of high quality and reliability for high power applications, a ceramic phosphor plate is expected as a substitute to silicone resin based phosphor layer. We will introduce phosphor ceramic composites in which phosphors dispersed in an inorganic matrix. A nitride yellow phosphor which has low thermal quenching can be sintered with the matrix. And it also sintered a nitride yellow phosphor and a red nitride phosphor with the matrix together. Recent MCC’s phosphor activity will also be introduced

  2. Single Crystal Phosphors Phosphor Optical Elements and Laser Based Lightening

    Jan Kubat, Ph.D. | Product Line Manager of CRYTUR spol. sro.

    Single crystal phosphor provides a novel way for light conversion to white or to color from green to orange with unique thermal stability properties and practically unlimited lifetime. Single crystal material free of any internal scattering is fully transparent for generated light and is ideal for shaping into form of fully valuable optical component with defined surface properties or coatings. Nevertheless suppression of speckle and good design of thermal management are crucial for laser based applications.

  3. Networking Break & Student Poster Session in Exhibit Hall

    Student Poster Session Sponsored by EMD Performance Materials

  4. High Crystallinity Nanosized Alumina Based Phosphors

    Lionel Bonneau, Research and Development, Technical Marketing Director, Baikowski

    Where will be highlighted the specificity of the Baikowski process in the manufacturing of highly efficient inorganic nanophosphors. * Chemical purity, (homogeneity of the crystallite size and quality of the color rendering). * Phasic purity (quality of the electronic transfer of the activator within the crystalline matrix for color control). * Physical characteristics that are used to specifically tailor the properties of the nanophosphors for transparent luminescent ceramics.

  5. New Data on Lu2O3:Tb- and Lu2O3:Pr-based Ceramic Storage Phosphors

    Eugeniusz Zych | Professor of University of Wroclaw

    We shall present the present statues of Lu2O3:Tb/Pr storage phosphors development. The dose-response dependence for Lu2O3:Tb,Hf ceramics revealed an impressive linear relationship over seven orders of magnitude, which is similar to the commercial Al2O3:C. The latter is more sensitive for the lowest doses but its high dose detection limit is lower. The energy stored in the Lu2O3-based storage phosphors can also be recovered by means of optical stimulation with wavelengths around 400-450 nm.

  6. Student Poster Session Presentation

    Sponsored by EMD Performance Materials

  7. Closing Remarks

Wednesday, March 15, 2017

Registration & Welcome

  1. Hot Breakfast in the Exhibit Hall

  2. Opening Remarks

New Applications for Phosphors

Novel situations in which to apply luminescent materials for one or the other purpose arise constantly and often call for phosphors with previously unknown or unused properties.  Some known cases demonstrated earlier are for example measuring the temperature or ambient pressure by monitoring spectroscopic characteristics of light emitting materials exposed to these conditions, through which changes then become evident.  Alternatively, light conversion has been used to enhance the sensitivity/efficiency of detectors and solar cells.  In this session, we discuss new and also review less known applications of phosphors that could constitute a novel opportunity for both academic research as well as industrial activities.    

 Session Chairs:    Dr. Oleg B. Shchekin, Lumileds, US

                               Dr. Ingo Koehler, Merck KGaA, Darmstadt, Germany

  1. Transportation

    Howard Bell, President, Intelligent Material Solutions Inc.

    The primary focus of IMS' program is the development and deployment of a Smart Paint/Sensor Platform for automated or any GPS equipped, human driven vehicles.  The Smart Paint technology provides several unique benefits including; a GPS calibration method enabling centimeter resolution of specific GPS coordinates and enhanced situational awareness by identification of upcoming intersections as well as but not limited to pedestrian cross-walks, bike lanes and other points of risk for collision. 

  2. Sensing and Signaling Networks in Plants. What’s Light Got to Do with it?

    Tessa Pocock PhD | Senior Research Scientist of Center for Lighting Enabled Systems and Applications (LESA)

    Recent advances in solid state lighting technology are enabling the development of ‘designer’ crops. The use of light by plants is rapid and complex. Light is the primary energy source required for crop growth and development but it also contains signals that shape the plant down to sub-cellular levels. Two sensing and signaling networks exist in plants however their regulation is crop specific. The assessment of lighting and spectral distributions on photosynthesis, growth and phytochemical value will be presented.

  3. Networking Break

Bioimaging Materials, Marker Materials and Approaches

Inorganic luminescent materials are not only applied in lamps and emissive displays. The 2D and 3D imaging of biochemical processes and medical diagnostic techniques, such as tomography, relies often on the conversion of IR, visible, UV, or x-ray radiation by a suitable radiation converter. These materials come often along as molecular complexes, nanoscale colloids, semiconductor quantum dots, transparent ceramics, or single crystals. This session covers different aspects of scintillators and radiation converters for bioimaging.

Session Chairs:  Dr. Alok M. Srivastava, GE Global Research, USA

                           Prof. Dr. Andries Meijerink, University of Utrecht, The Netherlands

  1. Efficient Near Infrared Persistent Phosphors for the Second and Third Bio-imaging Windows

    Prof. Dr. Setsuhisa TANABE | Professor of Kyoto University

    Persistent phosphor materials at the transparent windows of bio tissues are expected for in vivo imaging without excitation source, which produces various noises such as auto-fluorescence.  The ZnGa2O4:Cr3+ spinel phosphor is a successful example of persistent luminescence at 700nm, corresponding to the 1st bio-imaging window.  Because of recently advanced availability of InGaAs photo-detectors, near-infrared (NIR) fluorescence probes have been widely developed with luminescence of Nd3+:1.06-m and Er3+:1.55-m.  We have developed garnet-based persistent phosphors in which Nd3+ or Er3+ ions show very efficient and long NIR persistent luminescence.  Photon emission rate and duration of these materials are only slightly lower and shorter than the visible persistent phosphors of Ce3+-doped garnets we developed in 2014, the performance of which is almost comparable to the SrAl2O4: Eu2+, Dy3+.   These phosphors can be applied to in vivo imaging in the 2nd and 3rd bio-imaging windows of high transparency and sensitivity of InGaAs detectors.

  2. Applications of Infrared Phosphors in Medical Diagnostics

    Dr. Daiyu Hayashi | Research, Smart Interfaces & Modules of Philips Group Innovation

    Interactions between infrared light and human tissues plays decisive roles in photobiology of in-bodies. The major tissue constituents, like hemoglobin, oxy-hemoglobin, lipid, and water, exhibit each characteristic fingerprints in the light absorption spectra in visible to infrared wavelengths. The oxygen saturation and lactate levels in bodies can be determined by the absorption in 600-900 nm, 1800-2200 nm, respectively.  Tissue containing tumors shows characteristic absorptions different from that without tumors. Various tumor types exhibit the spectral fingerprints in the absorption and reflection spectra especially in near- to short-wave-infrared wavelength ranges. In this talk, we will present the current status and future scopes of the applications of infrared phosphors in medical diagnostics.

  3. Nanostructured Phosphors for Bioimaging, Maker Materials and Approaches

    Dr. Xiaogang Liu | Associate Professor of Chemistry of National University of Singapore

    Lanthanide-doped nanoparticles exhibit unique luminescent properties, including a large Stokes shift, a sharp bandwidth of emission, high resistance to optical blinking, and photobleaching. Uniquely, they can also convert long-wavelength stimulation into short-wavelength emission. These attributes offer the opportunity to develop alternative luminescent labels to organic fluorophores and quantum dots. In recent years, researchers have taken advantage of spectral-conversion nanocrystals in many important biological applications, such as highly sensitive molecular detection and autofluorescence-free cell imaging. In this talk, I will highlight recent advances in the broad utility of upconversion nanocrystals for multimodal imaging, bio-detection, display and photonics.

  4. Closing Remarks from Advisory Board