Journal
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Volume 12, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201800090
Keywords
amplified spontaneous emission; electrically pumped lasers; lead-free cesium tin halide perovskite; perovskite light-emitting diodes; vapor deposition
Funding
- National Natural Science Foundation of China [11574248, 61505161]
- International Cooperation by Shaanxi [2015KW-008]
- China Postdoctoral Science Foundation [2016M590947]
- Fundamental Research Funds for the Central Universities [xjj2016031]
- Natural Science Basic Research Plan of Shaanxi Province [2017JM6064]
- Scientific Research Plan Projects of Shaanxi Education Department [17JK0700]
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Pursuing novel new materials for fabricating efficient electrically pumped lasers is the emphasis of researchers for decades. Although organic semiconductors with high gain have been reported previously, a significant challenge remains in using them for electrically pumped lasers due to their low carrier mobility. Recently, hybrid halide perovskites have been reported to possess high carrier mobility and optical gain which allows them to be used for various optoelectronic applications. To explore the feasibility of using them as possible candidates for electrically pumped lasers, tin (Sn)-based perovskite light-emitting diodes (PeLEDs) with all-inorganic heterostructure are fabricated by the vapor-deposition process. The all-inorganic hetero-structured PeLEDs exhibited a maximum EQE of approximate to 0.34%, and withstood current density up to 915Acm(-2) with small emission zone of 0.01mm(2). In addition, by vacuum vapor deposition, extremely smooth and uniform cesium tin halide perovskite films with small grain size (approximate to 60nm) are obtained, in which low threshold (approximate to 7 mu Jcm(-2)) of their amplified spontaneous emission was presented. These characteristics demonstrate the great potential of using them as gain media for electrically pumped lasers.
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