Open AccessOptical Properties of Perovskite‐Organic Multiple Quantum Wells
Author(s) -
Antrack Tobias,
Kroll Martin,
Sudzius Markas,
Cho Changsoon,
Imbrasas Paulius,
AlbaladejoSiguan Miguel,
Benduhn Johannes,
Merten Lena,
Hinderhofer Alexander,
Schreiber Frank,
Reineke Sebastian,
Vaynzof Yana,
Leo Karl
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202200379
Subject(s) - photoluminescence , perovskite (structure) , materials science , quantum yield , absorption (acoustics) , quantum well , optoelectronics , light emitting diode , quantum efficiency , emission intensity , spectral line , yield (engineering) , quantum dot , laser , amplified spontaneous emission , optics , chemistry , fluorescence , physics , composite material , crystallography , astronomy
A comprehensive study of the optical properties of CsPbBr 3 perovskite multiple quantum wells (MQW) with organic barrier layers is presented. Quantum confinement is observed by a blue‐shift in absorption and emission spectra with decreasing well width and agrees well with simulations of the confinement energies. A large increase of emission intensity with thinner layers is observed, with a photoluminescence quantum yield up to 32 times higher than that of bulk layers. Amplified spontaneous emission (ASE) measurements show very low thresholds down to 7.3 µJ cm −2 for a perovskite thickness of 8.7 nm, significantly lower than previously observed for CsPbBr 3 thin‐films. With their increased photoluminescence efficiency and low ASE thresholds, MQW structures with CsPbBr 3 are excellent candidates for high‐efficiency perovskite‐based LEDs and lasers.