期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 5, 期 8, 页码 1300-1306出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz500434p
关键词
-
类别
资金
- Engineering and Physical Sciences Research Council
- Engineering and Physical Sciences Research Council [EP/G049653/1, EP/L024667/1] Funding Source: researchfish
- EPSRC [EP/G049653/1, EP/L024667/1] Funding Source: UKRI
The organic-inorganic hybrid perovskites methylammonium lead iodide (CH3NH3PbI3) and the partially chlorine-substituted mixed halide CH3NH3PbI3-xClx emit strong and broad photoluminescence (PL) around their band gap energy of similar to 1.6 eV. However, the nature of the radiative decay channels behind the observed emission and, in particular, the spectral broadening mechanisms are still unclear. Here we investigate these processes for high-quality vapor-deposited films of CH3NH3PbI3-xClx using time- and excitation-energy dependent photoluminescence spectroscopy. We show that the PL spectrum is homogenously broadened with a line width of 103 meV most likely as a consequence of phonon coupling effects. Further analysis reveals that defects or trap states play a minor role in radiative decay channels. In terms of possible lasing applications, the emission spectrum of the perovskite is sufficiently broad to have potential for amplification of light pulses below 100 fs pulse duration.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据