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Session
44
: Emerging Materials and Components |
Emerging Technologies and Applications
; Emissive, Micro-LED, and Quantum-Dot Displays
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Wednesday, May 15 / 03:30 PM - 5:10 PM / San Jose Convention Center, 220C
Chair:
Abhishek Srivastava, Hong Kong University of Science & Technology, Hong Kong, China
Co-Chair:
Jonathan Steckel, ST Microelectronics, Grenoble, France
44.1 - Top-Emitting Quantum-Dot Light-Emitting Diodes with Rainbow Emission Color and Their Application in Anti-Counterfeiting Recognition (3:30 PM - 3:50 PM)
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Lujun Zhai, Qiliang Li, Shuming Chen
Southern University of Science and Technology Shenzhen China
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The authors have successfully developed an advanced and highly secure anti-counterfeiting device based on quantum-dot light-emitting diodes (QLEDs). This novel device exhibits several key attributes, including affordability, non-replicability, ease of detection, and exceptional security. By incorporating both electroluminescence and photoluminescence modes, the device offers versatility in satisfying different levels of anti-counterfeiting needs. To enhance its security further, the researchers integrated physically unclonable functions (PUFs) and combined them with a pattern recognition system. This integration ensures the device's uniqueness and enables it to meet the most stringent anti-counterfeiting requirements.
44.2 - Toward 10-Watt Radiant Flux — Applications and Challenges of Photoluminescent Quantum Rods in High-Power LEDs (3:50 PM - 4:10 PM)
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Jianxin Song, Maksym Prodanov, Debjyoti Bhadra, Roja Gavara, Zebing Liao, Valerii Vashchenko, Abhishek Srivastava
The Hong Kong University of Science and Technology Hong Kong China
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Kumar Mallem
The Hong Kong University of Science and Technology Hongkong China
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This report examines the thermal stability of luminescent quantum rods under high-optical-flux LED conditions, analyzing degradation mechanisms and key factors. Findings reveal that smaller shell volumes and effective thermal management enhance reliability and practicality in high-power LED applications.
44.3 - High Efficiency and Brightness Green Quantum-Rod Light-Emitting Diode (4:10 PM - 4:30 PM)
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Zebing Liao, Maksym Prodanov, Kumar Mallem, Chengbin Kang, Jianxin Song, Debjyoti Bhadra, Abhishek Srivastava
The Hong Kong University of Science and Technology Hong Kong China
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Colloidal quantum dots have garnered significant interest for display and lighting applications. Despite substantial efforts, the maximum EQE of red, green, and blue quantum dots remains close to 25%, limited by the outcoupling efficiency of multi-layer structures. In this study, the authors employ rod-shaped nanocrystals instead of sphere-like quantum dots as the light-emitting layer. The theoretical device outcoupling efficiency significantly increases to nearly 41% due to the intrinsic horizontal dipole alignment within the quantum-rod film. As a result, the authors achieve record-high EQEs of 14.1%, with maximum brightness exceeding 150,000 cd/m2.
44.4 - MicroLED Arrays as Light Source for Optical Sectioning-SIM and Targeted Illumination Imaging (4:30 PM - 4:50 PM)
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Vikrant Kumar, Oliver Durnan, Ioannis Kymissis
Columbia University New York NY US
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Catherine Saladrigas, Victor Bright, Juliet Gopinath
University of Colorado Boulder Boulder CO US
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Forest Speed, Diego Restrepo, Emily Gibson
University of Colorado Anschutz Medical Campus Aurora CO US
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This work discusses microLED arrays as light sources for implementing optical sectioning structured illumination microscopy (OS-SIM) and targeted illumination (TI) for neural imaging applications. A microstripe array generates patterned light for OS-SIM with an addressable 20 x 20 microLED array light source for implementing TI in a wide-field imaging setup.
44.5 - Investigating Thymine, a DNA Base, as the Hole Transport Layer for Enhanced Performance in Quantum-Dot Light-Emitting Diodes (4:50 PM - 5:10 PM)
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Su-Hyeon Lee, Jae-In Yoo, Hyo-Bin Kim, Jincheol Jang, Jang-Kun Song
Sungkyunkwan University Suwon South Korea
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This study investigates the potential of nucleobase (NB) materials, with a specific focus on thymine as an HTL for QD-LEDs. NB materials offer cost-effectiveness compared to traditional organic optoelectronic materials, as they can be extracted from renewable sources. When thymine is inserted at a thickness of 5 nm, a stepwise structure is implemented, resulting in increased hole injection into the EML and consequently enhancing the overall performance of the device.