光致发光
钙钛矿(结构)
材料科学
量子产额
吸收(声学)
量子阱
光电子学
发光二极管
量子效率
发射强度
量子点
谱线
激光器
产量(工程)
放大自发辐射
光学
化学
荧光
物理
结晶学
复合材料
天文
作者
Tobias Antrack,Martin Kroll,M. Sūdžius,Changsoon Cho,Paulius Imbrasas,Miguel Albaladejo‐Siguan,Johannes Benduhn,Lena Merten,Alexander Hinderhofer,Frank Schreiber,Sebastian Reineke,Yana Vaynzof,Karl Leo
标识
DOI:10.1002/advs.202200379
摘要
Abstract 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.
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