Hot Paper - High-performance warm white LED based on thermally stable all inorganic perovskite quantum dots

High-performance warm white LED based on thermally stable all inorganic perovskite quantum dots

基于热稳定全无机钙钛矿量子点的高性能暖白色LED
熱安定化全無機ペロブスカイト量子ドットに基づく高性能暖白色LED
열 안정 전무기 칼슘 티타늄 광량자점을 기반으로 한 고성능 온백색 LED
LED blanco cálido de alto rendimiento basado en puntos cuánticos de Perovskita totalmente inorgánicos termoestables
LED blanche chaude haute performance basée sur des points quantiques Perovskites entièrement inorganiques stabilisés thermiquement
Высокопроизводительные теплые белые светодиоды на основе термостабильных полностью неорганических квантовых точек перовскита

Jr-Hau He 何志浩

Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong 999077, China
中国香港香港城市大学材料科学及工程学系

https://doi.org/10.29026/oea.2023.230022

https://www.oejournal.org/article/doi/10.29026/oea.2023.230022

Opto-Electronic Advances, 25 March 2023

Abstract

All inorganic CsPbBr3 quantum dots (QDs) are regarded as excellent candidates for next-generation emitters due to their high photoluminescence quantum yield (PLQY) and defect tolerance. However, the poor stability and degraded luminescent performance may impede their further commercialization because of the separation of conventional ligands from the QDs surfaces.

Recently, Zang replaced the regular oleic acid with 2-hexyl-decanoic acid (DA), which possesses higher binding energy on the QDs surfaces, to act as ligands of QDs, exhibiting PLQY of 96% and excellent stabilities against ethanol and water. WLEDs with DA-modified CsPbBr3 QDs achieved improved thermal stability, a color rendering index of 93, a power efficiency of 64.8 lm/W and a properly correlated color temperature value of 3018 K, implying their prominent applications in solid-state lighting and displays.

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