Premium
Quasi‐2D Inorganic CsPbBr 3 Perovskite for Efficient and Stable Light‐Emitting Diodes
Author(s) -
Shang Yuequn,
Li Gang,
Liu Weimin,
Ning Zhijun
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201801193
Subject(s) - perovskite (structure) , materials science , light emitting diode , optoelectronics , luminescence , diode , nanocomposite , quantum yield , quantum efficiency , halide , quantum dot , nanotechnology , optics , inorganic chemistry , crystallography , fluorescence , chemistry , physics
Metal halide perovskites are rising as a competitive material for next‐generation light‐emitting diodes (LEDs). However, the development of perovskite LEDs is impeded by their fast carriers diffusion and poor stability in bias condition. Herein, quasi‐2D CsPbBr 3 quantum wells homogeneously surrounded by inorganic crystalline Cs 4 PbBr 6 of large bandgap are grown. The centralization of carriers in nanoregion facilitates radiative recombination and brings much enhanced luminescence quantum yield. The external quantum efficiency and luminescence intensity of the LEDs based on this nanocomposite are one order of magnitude higher than the conventional low‐dimensional perovskite. Meanwhile, the use of inorganic nanocomposite materials brings much improved device operation lifetime under constant electrical field.