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Optoelectronic system and device integration for quantum-dot light-emitting diode white lighting with computational design framework.

Chatura SamarakoonHyung Woo ChoiSanghyo LeeXiang-Bing FanDong-Wook ShinSang Yun BangJeong-Wan JoLimeng NiJiajie YangYoonwoo KimSung-Min JungLuigi Giuseppe OcchipintiGehan A J AmaratungaJong Min Kim
Published in: Nature communications (2022)
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.
Keyphrases
  • machine learning
  • light emitting
  • quantum dots
  • big data