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Conference Paper
Light Recycling in Quantum-Dot Organic Light-Emitting Diode Using SideWall Reflector Formed by a Secondary Sputtering Lithographic Technique
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- Authors
- Hyunsu Cho, Jaedong Jang, Sukyung Choi, Chan-mo Kang, Jin-Wook Shin, ByoungHwa Kwon, Gi Heon Kim, Nam Sung Cho, Jin Sun Kim, Jong Ho Jeong, Jeong Ah Kim, Hyoc-Min Youn, Hee-Tae Jung
- Issue Date
- 2025-05
- Citation
- Society for Information Display (SID) International Symposium 2025, pp.1948-1950
- Language
- English
- Type
- Conference Paper
- Abstract
- In quantum dot-organic light-emitting diode (QD-OLED), the emission from the blue OLED is absorbed by QDs and re-emitted to implement green and red subpixels. To prevent optical crosstalk between pixels, black matrices (BMs) are utilized. During the color conversion process, re-emitted light is released in random directions. If a reflective layer is formed on the BMs, the light can either be reabsorbed by the QD layer for reuse oremitted externally without being lost in the BM layer. In this study, a BM structure was directly formed on the blue OLED and a secondary sputtering lithographic technique was used to fabricate reflective side-walls. The process was conducted without damaging the OLED device. By forming the QD layer between the reflective walls, a 20% improvement in color conversion efficiency was observed compared to when reflective walls were not used.
- KSP Keywords
- Blue OLEDs, Conversion efficiency(C.E.), Lithographic technique, Quantum dot(Qdot), Side-wall, color conversion, conversion process, light emitting diodes(LED), optical crosstalk, organic light emitting diode(OLED), secondary sputtering