In-situ Fabricated Perovskite Quantum Dots for Display Applications
Haizheng Zhong a
a Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Materials Sciences & Engineering, Beijing Institute of Technology, Beijing, 100081, China
nanoGe Perovskite Conferences
Proceedings of International online conference on Hybrid materials and optoelectronic devices (HYBRIDOE)
Online, Spain, 2020 December 15th - 17th
Organizers: Xueqing Xu, Baomin Xu, Hin-Lap (Angus) Yip and Xinhua Zhong
Invited Speaker, Haizheng Zhong, presentation 048
Publication date: 4th December 2020

Perovskite quantum dots (QDs) are now emerging as low-cost alternative emitters for display applications. Very recently, we developed the in-situ fabrication of hybrid perovskite QDs embedded composite films (PQDCF) with high transparency, superior photoluminescence emission and additional processing benefits for down-shifting applications. The potential use of PQDCF as color converters in LCD backlights was successfully demonstrated, showing bright potential in display technology. Very recently, a dual green and red emissive composite film was developed for Mini-LED backlighting applications. Moreover, we further explored the electroluminescence devices based in-situ fabricated perovskite QDs. We illustrated the enhancing role of ligand-assisted reprecipitation (LARP) process and obtained uniform FAPbX3 (X=Br, Cl, I) perovskite QDs films with photoluminescence quantum yield up to 78%. The electroluminescence devices with a maximum external quantum efficiency (EQE) of 16.3%, 15.8% and 8.8% were achieved for green, red and blue devices, showing the promising to achieve high efficiency. In all, the in-situ fabrication strategy provides very convenient route for display technology.

Fig. 1. Schematic illustration of the in-situ fabrication process, the optical images, absorption and PL spectra of the as-fabrication PQDCFs.



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