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- Title
Optoelectronic system and device integration for quantum-dot light-emitting diode white lighting with computational design framework.
- Authors
Samarakoon, Chatura; Choi, Hyung Woo; Lee, Sanghyo; Fan, Xiang-Bing; Shin, Dong-Wook; Bang, Sang Yun; Jo, Jeong-Wan; Ni, Limeng; Yang, Jiajie; Kim, Yoonwoo; Jung, Sung-Min; Occhipinti, Luigi G.; Amaratunga, Gehan A. J.; Kim, Jong Min
- Abstract
We propose a computational design framework to design the architecture of a white lighting system having multiple pixelated patterns of electric-field-driven quantum dot light-emitting diodes. The quantum dot of the white lighting system has been optimised by a system-level combinatorial colour optimisation process with the Nelder-Mead algorithm used for machine learning. The layout of quantum dot patterns is designed precisely using rigorous device-level charge transport simulation with an electric-field dependent charge injection model. A theoretical maximum of 97% colour rendering index has been achieved with red, green, cyan, and blue quantum dot light-emitting diodes as primary colours. The white lighting system has been fabricated using the transfer printing technique to validate the computational design framework. It exhibits excellent lighting performance of 92% colour rendering index and wide colour temperature variation from 1612 K to 8903 K with only the four pixelated quantum dots as primary. Next generation smart lighting requires high colour rendering and wide colour controllability. Here, Jung et al. realise, via a systematic colour optimisation and a computational charge transport simulation, white quantum dot light-emitting diodes with high colour performance.
- Subjects
JUNG, C. G. (Carl Gustav), 1875-1961; OPTOELECTRONIC devices; SYSTEM integration; QUANTUM dots; LIGHT emitting diodes; TRANSFER printing; CHARGE injection; DAYLIGHT; MONOCHROMATIC light
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-31853-9