Affiliation:
1. School of Physics and Electronic Engineering Chongqing Normal University Chongqing 401331 China
2. Chongqing Research Institute Changchun University of Science and Technology Chongqing 401135 China
3. CAS Key Laboratory of Standardization and Measurement for Nano‐technology National Center for Nanoscience and Technology Beijing 100190 China
Abstract
AbstractThe most attractive advantages of all‐inorganic cesium lead halide perovskites are their optical gain over broad spectral ranges through the visible spectrum, so are well suited to use in tunable lasers or broadband amplifiers. Most reported anion exchange reactions face a challenge to achieve the desired halogen‐variable perovskites due to rapid and uncontrollable reactions and difficulty to synthesize directly. In this study, a simple vapor/solid anion exchange strategy is demonstrated for controlling the reaction process and realizing a wide range tuning of band gap and amplified spontaneous emission (ASE) wavelength, which exhibits a temperature‐dependent anion exchange rate. By optimizing the reaction temperature at 90 °C, the ASE wavelength can be linearly manipulated by just controlling the reaction time. A clear quantitative relationship between ASE peak position and reaction time is achieved. Compares with the CsPbClBr2 film obtained via the liquid phase anion exchange method, the fabricated perovskite films obtained by vapor/solid anion exchange technology exhibit superior film quality and enhanced ASE performance. This work may have applications in the future using facile and controllable techniques to develop high‐quality full‐color visible lasers.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
2 articles.
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