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Agenda

Registration & Welcome
Registration Open and Continental Breakfast Available
Welcome & Opening Remarks

Ashli Speed, Conference Producer, Smithers
 

Session I: Identifying the Need/Market Analysis
Session Description
This session will provide an update on the current phosphor and quantum dot market. These presentations will identify the recent challenges and unmet needs of end-users for both Phosphors and Quantum Dots.
 
Status of the Display Industry and Technology Landscape
Demand saturation, excess capacity, trade war… The display industry is once again at a cross-road. Which are the new features that could bring consumers back to the store to update their devices? Which are the technologies lining up to deliver those features? How far are they in the development and industrial cycle? What is the role played by downconverters, electroluminescent and photo-luminescent nano-particles in the future of display? This presentation will provide a high-level picture of the display industrial and technological landscape and focus on some technologies where color converters play a major role.
 
Dr. Eric Virey | Senior Market & Technology Analyst, Yole Développement
Converters for Illumination: New Approaches and Applications
The solid-state lighting revolution is in full swing, with LEDs replacing traditional light sources in almost all illumination applications.  Dramatic improvements in performance, combined with steep price erosion, have resulted in very-low-cost solutions for energy savings that are benefiting end users but challenging manufacturers with respect to profitability.  Novel luminescent materials offer new potential paths for differentiation and value generation for manufacturers, in important emerging illumination applications such as human centric lighting, beautification, and imaging.  This presentation will explore opportunities open to luminescent materials developers and suppliers within these new areas of value creation, and highlight some novel approaches being undertaken.
 
Dr. Mike Krames | President & Owner, Arkesso LLC
Outlook on Quantum Dot TV and Coronavirus Projected Market Impact
Presentation will address the battleground in premium TV between LCD and OLED, and the role Quantum Dots will play in premium offerings for both technologies. Presentation will include analysis of the cost structure of QD panel architectures and a forecast of quantum dot products for TV and other applications.
  • QDEF
  • QD OLED
  • Market Forecast
  • Cost Analysis

Bob O'Brien | Co-Founder and President, Display Supply Chain Consultants (DSCC)
Networking Break & Coffee
Session II: A Look at Displays
Session Description
This session will feature presentations on the latest developments in displays, including progress in micro LED displays, QD electroluminescent display and narrow band phosphors for wide-gamut color displays.
 
Exploring Leading Edge Developments in Portable Device Display
Light, color, contrast are the key elements of communication, and today the portable device display is the dominant communication portal. The challenges for modern displays are increasingly complex, but the rewards of prolifically making visual interfaces colorful, bright, efficient and healthy, can be enormous. Looking ahead we see ever more exciting opportunities in the faster than Moore’s law growth of visual technologies, and in the elemental source of this revolution: the materials. This presentation will recap on some of the leading-edge developments, the gaps in the value chain, the challenges and key factors for success, and explore some possible options.
 
David Wyatt | CTO, Pixel Display
Realizing the Promise of Micro LED Displays
The demand for low power in mobile devices has increased dramatically in the past ten years due to limited battery lifespan. One of the components with the highest percentage of total power consumption, and therefore a suitable candidate for improvement, is the display. Inorganic µLEDs have a number of potential advantages over organic LEDs (OLEDs) for display applications. These include the possibility of high brightness and higher power efficiency. In this talk, the ecosystem components of micro LED displays will be discussed including the potential need for color conversion materials such as quantum dots.
 
Khaled Ahmed | Global Supply Chain & Technology Development, Principal Engineer, Intel
PFS/KSF Phosphor in Display and General Illumination Applications
Starting when GE launched the technology in 2014, PFS/KSF Phosphor filled the void for an efficient, on-chip red luminescent material desired in both display applications seeking wider color gamut performance as well as general illumination applications desiring high-efficiency lighting with truer color rendering of illuminated areas and objects.  With PFS/KSF Phosphors in display devices, LEDs illuminate with a truer saturated red yielding vivid red colors while reducing yellowing of the green pixel emission.  In general illumination, the technology has enabled lighting products with 90CRI and R9>50 at the same/better lumen efficiency as 80CRI products starting with products launched in 2015.  Moreover, the technology is well suited for high-quality, high-efficient lighting as evaluated with evolving color standards (e.g. TM-30).   Significant progress has been made to enable more challenging applications for these fluoride Mn4+  phosphors in terms of both cost and reliability.  Today’s use of this technology as well as areas of development, innovation, and expansion for PFS/KSF Phosphor will be discussed.
 
Dr. Bill Cohen | PFS Business Leader, GE Current
Networking Lunch
Session III: A look at Lighting
Session Description
This session will feature presentations focused on how the use of highly engineered color conversion materials in lighting applications can lead to the design and commercialization of novel LEDs.
 
Novel Color/Spectral Tunable LED Helps to Organize Our Circadian Rhythms
In the general lighting market, the transition from CRI80 to high CRI LED is slower than expected because of existing efficacy gap. To encourage further growth of the market, Nichia believes that additional features will be needed, without decreasing the efficacy. In this forum, we will discuss the original concept and the research used to prove out this new color/spectral tunable LED which can tailor both CCT and melanopic spectral factor to match our circadian rhythms without the efficacy dropping. We believe that this LED will help to control disordered sleep and decrease eye fatigue. Hence, this will be suitable for educational, health care facilities and manufacturing environments.
 
Dr. Sadakazu Wakui | Phosphor Engineer, Nichia
Full Spectrum Artificial Lighting and Virtual Windows for Human Health and Well-Being
Recent research correlating the cognitive psycho-physiological health of human beings and their interactions with nature and natural light conditions are clearly indicating the important role of windows with external views on the productivity and well-being of building occupants. Providing access to outdoor views and natural lighting to every occupant in a building is a daunting task for architectural designers and often cost prohibitive when accounting for energy efficiency of the buildings. This talk will present the design and operation of emerging LED-LCD based virtual window systems. A new approach for designing tunable spectrum phosphors and phosphor based LEDs for virtual windows and full spectrum lighting applications will be discussed.
 
Dr. Partha Dutta | Professor of Electrical, Computer and Systems Engineering, Rensselaer Polytechnic Institute
The Intersection Between Visual Light and Physiological Light
In recent years we’ve discovered several new photoreceptors in both and eye and the skin.  Each one mediates a different physiological effect. This session will cover the physiological effects of light and their importance in our everyday lives as well as the considerations needed when considering visual comfort.
 
Robert Soler | VP of Research, BIOS Lighting
Quantum Dots as QLED Devices for Automotive Lighting Systems
Lighting in the automotive world has undergone a radical change in recent years thanks to LED devices, and the use of halogen lamps is being replaced by these light emitting diodes. One of the main advantages, apart from the consumption and the long useful life, is the style that these devices offer. The current and future trend in the automotive world is to achieve ever greater lighting surfaces with flexible features and shapes in three dimensions.
  • QLED
  • automotive applications
  • lighting systems
  • electroluminescence
  • transport layers
  • nanoparticles

Juan J Santaella | R&D HW Manager, VALEO Lighting Systems
Networking Break
Session IV: The Combination of both Phosphors and Quantum Dots
Session Description
This session will highlight the ever-growing opportunities in industry to uniquely combine highly engineered phosphors and quantum dots to realize new and innovative products and designs.  By leveraging the strengths of both QDs and phosphors never before achieved performance will be discussed and emphasized.
 
Combining Phosphors and Quantum Dots: On-chip Operation and Solution Tailoring
Solid state lighting-based phosphor-converted LEDs have evolved over the last two decades as the driving force in the general illumination market. Improvements in efficacy and product quality have been the main objective. Enhancing these poses a particular challenge as the maturity of conventional LED phosphors has progressed tremendously, and the limits are becoming apparent. Additionally, the quality of light with properties like CRI and FCI is becoming more and more important.By developing red-emitting Quantum Dots (QD), encapsulated to face harsh external influences such as moisture and thus enabling on-chip operation, and combining them with LED phosphors, OSRAM Opto Semiconductors pushes the limits of high-CRI white LEDs. The narrow band emission of QDs together with the high variety of LED phosphors enables flexible engineering to maximize spectral efficiency and thus boost product efficacy. Due to the ability to spectrally tune the QDs e.g. by changing the size, more applications can be envisioned.  This presentation will give insights in the interplay of phosphor and QDs in solution tailoring, procedures that enable on-chip operation and additional applications enabled by this beyond general lighting.
 
Sebastian Stoll | Development Engineer, OSRAM Opto-Semiconductors
Towards Future Display Technologies: On-chip Grade Quantum Dots
Quantum Dots (QDs), the nanocrystals that can downconvert light with high efficiency, are on their way to revolutionize display and lighting applications. However, the widespread use of QDs is limited by two issues. As cadmium is restricted by RoHS, the use of cadmium-based QDs is limited. Second, the Cd-free alternatives deteriorate quickly under high temperatures and light flux conditions. At Ghent University we’ve developed a Cd-free technology that can withstand these harsh conditions and can be used directly on the LED chip. This opens new possibilities for QDs that are being explored by the spinoff company QustomDot.
 
Willem Walravens | CTO & Founder, QustomDot
Evening Networking Reception
Registration & Opening Remarks
Registration Table Open and Hot Breakfast Available
Opening Remarks
TRACK ONE, Session V: Phosphor Track
Session Description
This session will deep-dive into the latest phosphors innovations in academia and industry.
 
Far Red Phosphors for Horticulture LED Systems
The far-red (FR) region (700 nm-740 nm) of the electromagnetic spectrum has significant implication for plant growth and development. Exposure to red light regulates processes ranging from seed germination, height, leaf expansion, branching, plant immunity, circadian rhythm, leaf chlorophyll concentration to freezing tolerance. Additionally, FR light plays a role in photosynthesis. In this talk we will discuss research undertaken to develop phosphor converted far-red LEDs for horticultural lighting. In particular, the FR luminescence from transition metal and rare earth ions in oxide and fluoride lattices that are excitable by the blue light from the LED device is emphasized.
 
William Beers, Ph.D. | Principal Engineer - Phosphors, GE Current
Development of Yellow/Orange Nitride Phosphors for High-Power Excitation
Lights under high power excitation is collecting a lot of attention in solid state lighting fields lately. Applications under blue laser excitation instead of LED are being developed actively. Phosphors which can be used under blue laser excitation are limited due to their saturation and thermal quenching issues. Orange and red phosphors suitable for such an application are needed. We succeeded in widening emission color of La3Si6N11:Ce between yellow and orange with superior saturation and thermal quenching properties. We will report this phosphor and our recent activities.
 
Dr. Shiho Takashina | Senior Manager, Mitsubishi Chemical Corporation
Single Crystal Phosphor Based Components and Applications
Solution with single crystal as an excellent phosphor with internal quantum efficiency over 95% up to 250°C, high thermal conductivity (~10 W/m.K) and luminescence thermal quenching over 200°C provides new opportunities for a components and design of high power lighting applications. But even employing highly efficient monocrystalline phosphor with multiple high power laser diodes can lead to overheating and then thermal management become crucial. We have optimized solutions based on principles of metal contact which assures the most efficient connection of the phosphor to the copper heat sink to deal with the heat. Unique single crystal phosphor based applications and will be introduced.
 
Jan Kubat, Ph.D. | Product Line Manager, CRYTUR
Networking Break
Group VI Metalates as Thermosensitive Phosphors
Group VI metal oxides featuring MoO4–2 and WO4–2 anions are ideal host materials for thermosensitive phosphors activated by Mn4+ or rare-earth metals. A distinct feature of these materials is their structural diversity in terms of metal coordination and connectivity, which makes them an ideal platform to exercise compositional control of their temperature-dependent luminescence response. In this talk, I will highlight the potential of molybdate and tungstate phosphors as luminescent thermometers. I will show that selected Mn4+-activated metalates serve as bandshift thermometers with a temperature sensitivity comparable to that of quantum dots but with a much broader usable temperature range.
 
Prof. Federico Rabuffetti | Assistant Professor of Chemistry, Wayne State University
Broadband Near-Infrared Phosphors with High Radiant Flux as Future Light Sources for LED
The near-infrared (NIR) light source is desirable for real-time non-destructive examination applications, which include the analysis of foodstuffs, health monitoring, iris recognition, and infrared cameras. The light emission spectra of such infrared light sources should also be broad as possible for effective performance, in view of the broad absorption and reflection of light by the organic elements present in foodstuffs and human health in the blue and NIR regions of the electromagnetic spectrum, respectively. In this report, a blue light-emitting diode (LED) excitable broad-band NIR phosphor light source is developed.
 
Professor Ru-Shi Liu | Professor, Department of Chemistry, National Taiwan University
Higher Powers
There is an increasing need for high power density light sources, e.g. for the next generation of car headlights, diode laser pumped white light sources and projection devices. However, saturation and droop at high excitation densities limit the light output in high power devices. Excited state absorption and long excited state lifetimes play a role, but the relation between light output and excitation power is poorly understood and is a complex interplay of a variety of quenching processes including ground state depletion, Auger quenching, reabsorption and color center formation. The development of superior materials is crucial and relies on a better understanding of droop processes and the relation with the nature and processing condition of light conversion materials.  In this presentation a variety of quenching mechanisms will be evaluated and illustrated. Experiments are reported that elucidate the physics of photosaturation in common LED phosphors. By measuring emission intensity and reflectivity of a phosphor material under a variety of (modulated) excitation schemes, we distinguish between the different possible photosaturation mechanisms. Implications of our results and possible ways to mitigate phosphor saturation will be discussed. Finally, new experimental and theoretical capabilities will be outlined that may help to acquire new insights in what limits the light output in current and future high brightness light sources.
 

Prof. Dr. Andries Meijerink | Professor, University of Utrecht
TRACK TWO, Session V: Quantum Dot Track
Session Description
This session will deep-dive into the latest and greatest QD innovations in academia and industry.
 
*Due to current travel restrictions, some of our previously scheduled presenters will not be in attendance at this year's event. In their absence, we have requested recordings of omitted presentations (where possible) to be distributed on site.*
 
Quantum Dots For Color Conversion Applications
Quantum dot color conversion (QDCC) technology, in which traditional color filters are replaced by patterned subpixels containing green or red QDs, will lead to displays with higher brightness, color tunability and viewing angles. QDCC layers can be applied to any display containing a blue light source, including LCDs, OLEDs and micro-LEDs, and fabricated using inkjet printing or photolithography, depending on the feature size requirement. Nanosys has developed specially designed Cd-free QDs with enhanced blue absorption and green/red emission for use in color conversion. We will discuss these design criteria, as well as the strategies used for compatibilizing the QDs with inks or photoresists used for deposition.
 
Dr. Ravi Tangirala | R&D Program Manager, Nanosys Inc.
Networking Lunch
Session VI: Novel Materials and Applications
Session Description
This session will explore and highlight novel and emerging use of phosphors and quantum dots in several different applications.  Presentations from both academia and industry will give a deep look at what other technologies and applications the phosphor and QD communities are exploring and what is potentially going commercial next.
 
Towards the Optimum Single Ion Luminescence Thermometer – An Account for Simple and Quantitative Guidelines
Despite the quickly emerging importance of luminescence nanothermometry for, e.g. catalysis or especially bio-applications to remotely measure temperatures, a general and widely applicable theoretical framework is still lacking. Not only would this save the effort to find new suited nanothermometers by a trial-and-error strategy and lots of optimization, but even clarify what the appropriate conditions relevant for the achievable temperature precision are in order to use a certain nanothermometer. In this contribution, an introduction for a generalized model for luminescence thermometers working with dopant ions such as transition metal or lanthanide ions will be presented. The emphasis will lie on the simple quantitative guidelines following from the fundamental properties of the Boltzmann distribution as the governing temperature calibration law. Moreover, the boundary conditions for the validity and failure of that calibration law will be addressed. Finally, it will also be demonstrated that the predicted thermometry performances of potential candidates are indeed experimentally realized.
 
Dr. Markus Suta | Postdoctoral Researcher, Utrecht University
Interparticle Energy Transfer: A Novel Toolbox for Spectral Design
Line emitters (FWHM <5 meV) have an enormous potential for use in LEDs, because they allow both improvement of color rendering while maintaining high lm/W for white LEDs. However, conventional line emitters (i.e. trivalent lanthanide doped phosphors) lack absorption in the blue spectral region, thus limiting their use as color converters on blue LEDs. This bottleneck can be overcome by our nanoscale engineering approach, based on inter particle energy transfer. Making use of inter particle energy transfer allows tuning of absorption and emission wavelengths over a wide range of the spectrum. When the initial challenge of preparing high quality nanoparticles has been overcome, the nanoscale brings in various additional advantages, such as solution processability and a gamut of material treatment possibilities borrowed from the well developed field of semiconductor quantum dots. This talk will discuss the relevant energy transfer process in more detail and provide experimental evidence for this new sensitization mechanism paving the road towards blue excitable line emitters.

Dr. Anne Berends | Materials Scientist, Seaborough Research
Photovoltaic Form Factors for Quantum Dot Luminescent Solar Concentrators
With over 50 years of research and development, luminescent solar concentrator (LSC) designs for photovoltaic (PV) applications continues to progress toward a commercially realizable technology.  With the advent of the quantum dot (QD) for LSCs in the late 20th century, unprecedented levels of light trapping and harvesting for LSCs at the lab scale have shown promise for sunlight-harvesting applications.  However, despite accomplishments in these small-scale devices, a performance-scalable LSC device for solar energy conversion remains an enormous and unanswered challenge.  Here we examine several form factors for LSCs to enable both high light to electrical power efficiency as well as device-size scalability.
 
David Needell | PhD Researcher in Solar PV, Caltech
Synthesis of YAG- and RE fluoride-based Nanophosphors and Their Incorporation in 3D Composite Structures for Optical Applications by Self-assembly Process
Hybrid materials are intensively investigated for optical applications (bioimaging, sensors, filters, photocatalysis…) [1]. Nanoparticles of oxides or fluorides can be used as prepared or incorporated in 2D/3D materials for the final application, using either self-assembly process or included in transparent matrices. The presentation will first study the synthesis of rare earth element doped YAG nanophosphor by glycothermal approach. Influence of some key synthesis parameters on the resulted morphology differences of nanophosphors will be discussed [2]. Then rare earth fluorides or metal oxides self-assembled to build 2D or 3D structures and heterostructures will be further demonstrated [3,4,5]. Controlled destabilization of stable colloidal suspension was used to prepare oxides (YAG), fluorides (Rare Earth) crystalline xerogels and aerogels and mixed-composite with controlled porosity, mechanical resistance and optical properties [6]. This offers a wide possibility of compositions of materials for applications in energy storage, catalysis, photocatalysis, optics, sensors.
 
Dr. Yige YAN | Postdoctoral Researcher, ENS Lyon
Open Panel Discussion with the 2020 Advisory Board
Take part in an open discussion with representatives from the 2020 Advisory Board surrounding the future outlook and industry perceptions, a collaborative call to action, and a vision for the 2021 Phosphors & Quantum Dots Industry Forum.

Participating Board Members Include:
  • Jonathan S. Steckel, PhD, Director of Advanced Technology Intelligence, STMircoelectronics
  • Dr. Charlie Hotz, Vice President of R&D, Nanosys Inc
  • Dr. Mike Krames, President & Owner, Arkesso LLC
  • Dr. Eric Virey, Senior Market & Technology Analyst, Yole Développement
Closing Remarks for the 2020 Meeting