In-situ Fabricated Perovskite Quantum Dots:From Synthesis to Applications
Haizheng Zhong a
a Beijing Institute of Technology, Zhongguancun South Street, Beijing, 100081, China
Online School
Proceedings of Online school on Fundamentals of Semiconductive Quantum Dots (QDsSCHOOL)
Online, Spain, 2021 May 11th - 13th
Organizers: Quinten Akkerman, Sergio Brovelli and Liberato Manna
Invited Speaker, Haizheng Zhong, presentation 009
DOI: https://doi.org/10.29363/nanoge.qdsschool.2021.009
Publication date: 30th April 2021

Perovskite quantum dots (QDs) are now emerging as low cost functional materials for many photonic applications due to their superior optical properties and easy fabrication. Recently, we developed the in-situ fabrication of hybrid perovskite QDs in polymeric films (PQDF) with high transparency, superior photoluminescence emission and additional processing benefits for down-shifting applications. The potential use of PQDF 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. In this talk, I will introduce the progress on the development of in-situ fabricated perovskite quantum dots toward other photonic and optoelectronic applications.

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