Open AccessTwo‐dimensional halide perovskite quantum‐well emitters: A critical review
Author(s) -
Wang Kang,
Park Jee Yung,
Dou Letian
Publication year - 2021
Publication title -
ecomat
Language(s) - English
Resource type - Journals
ISSN - 2567-3173
DOI - 10.1002/eom2.12104
Subject(s) - light emitting diode , perovskite (structure) , photoluminescence , optoelectronics , materials science , quantum well , diode , exciton , halide , quantum dot , laser , nanotechnology , chemistry , physics , optics , inorganic chemistry , quantum mechanics , crystallography
Abstract Two‐dimensional (2D) halide perovskites can be regarded as natural organic‐inorganic hybrid quantum wells, which exhibit very promising light‐emitting applications due to their high photoluminescence quantum yield, narrow emission bandwidth, and large exciton binding energy. However, it remains a grand challenge to achieve reliable devices for both light‐emitting diodes (LEDs) and lasers utilizing phase‐pure 2D perovskites. Recently, exciting progresses have been made with respect to molecular design, optoelectronic property, and device fabrication for novel 2D perovskite hybrid quantum‐wells. In this article, we critically review the key challenges of exciton losses, charge injections, and triplet issues associated with the light‐emitting applications of such phase‐pure 2D perovskites after examining their recent breakthroughs in LEDs and lasers. Lastly, we provide a new perspective on molecular engineering strategies to address the above‐mentioned fundamental issues, which may open up a new avenue to the development of highly efficient quantum‐well emitters for solid‐state lighting and display.