期刊
CERAMICS INTERNATIONAL
卷 48, 期 12, 页码 16730-16736出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.02.222
关键词
Inorganic perovskite; X-ray activated persistent radioluminescence; Low temperature
资金
- National Natural Science Foundation of China [11705090, 11875166, 11435010]
In this study, undoped Cs4PbBr6 single crystals exhibited ultralong phosphorescence emission at low temperatures. The ultralong phosphorescence emission originates from defect-related emission. This finding opens up potential revolutionary applications.
Recently, all-inorganic cesium lead-halide perovskites have shown their promise for light emission applications, due to the excellent optical performance. Herein, we report that the initially nonphosphorescent undoped lead halide Cs4PbBr6 single crystals (SCs) exhibit an ultralong phosphorescence emission under X-ray excitation at low temperatures. It is shown that the dramatic change has been taken place in radioluminescence spectra and the broad-band emission gradually appeared with the decrease of temperature. Below 210 K, the radioluminescence spectra can be deconvoluted into one narrow peak located at 530 nm and two broad peaks centered at 595 nm and 672 nm respectively. Subsequently, the time-dependent radioluminescence spectra in undoped lead-halide Cs4PbBr6 SCs were investigated. The ultralong phosphorescence emission can persist over 120 min at 70 K. We consider that ultralong phosphorescence originates from defect-related emission. To the best of our knowledge, our finding is the first time that undoped Cs4PbBr6 SCs exhibit the phosphorescence emission, which will offer a paradigm to motivate revolutionary applications on perovskite.
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