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

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. 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.

Automated summary

In this study, white quantum dot light emitting diodes with high color performance are achieved through systematic color optimization and computational charge transport simulation. The white lighting system demonstrates excellent lighting performance with a color rendering index of 92% and a wide color temperature variation range.