| 稀释时间对铯基卤化铅钙钛矿纳米晶母液性能的影响 |
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| 引用本文：李丹,吴益华,谌长松,朱志刚,施惟恒.稀释时间对铯基卤化铅钙钛矿纳米晶母液性能的影响[J].上海第二工业大学(中文版),2019,(2):103-109 |
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| 基金项目:上海第二工业大学研究生项目基金(EGD17YG003) 资助 |
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| 中文摘要:铯基卤化铅(CsPbI3) 钙钛矿纳米晶具有高光致发光效率、窄的半峰宽及高量子产率等光电特性。但是由于
纳米晶的表面缺陷, 导致CsPbI3 钙钛矿纳米晶稳定性较差, 限制了其应用范围。改善表面缺陷, 提高纳米晶的稳定
性成为研究热点。所以在传统热注法制备CsPbI3 纳米晶的基础上, 采用简单的母液稀释法, 160 ℃ 下油浴合成晶格
间距为0.62 nm 对应CsPbI3 标准卡片(100) 晶面的立方相纳米晶。通过表征纳米晶的荧光发射和吸收性能, 并结
合稳定时间的变化, 结果发现其发射峰稳定在680~700 nm 左右。稳定时间由原来的7 d 提高到10 d, 大大提高了
CsPbI3 纳米晶的稳定性, 而且降低了发射波长峰值处强度衰减速率, 延迟了荧光猝灭进程。 |
| 中文关键词:铯基碘化铅 稀释时间 稳定性 |
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| Influence of Dilution Time for Mother Solution on the Properties ofCesium Lead Iodide Perovskite Nanocrystals |
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| Abstract:Cesium-based lead halide (CsPbI3) perovskite nanocrystals have photoelectric properties such as high photoluminescence
efficiency, narrow half-peak width and high quantum yield. However, due to the surface defects of the nanocrystals, the stability of
CsPbI3 perovskite nanocrystals is poor, which limits their application range. Improving the surface defects and improving the stability
of nanocrystalline have become a research hotspot. Therefore, on the basis of the preparation of CsPbI3 nanocrystals by traditional
thermal injection method, a simple mother solution dilution method was adopted to synthesize cubic phase nanocrystals corresponding
to the standard card (100) crystal surface of CsPbI3 with a lattice spacing of 0.62 nm at 160 ℃ oil bath. The fluorescence emission and
absorption properties of nanocrystalline were characterized, and the stability time was changed. The results show that the emission peak
is stable at the range of 680 nm to 700 nm. The stability time increases from 7 d to 10 d, which greatly improves the stability of CsPbI3
nanocrystals, and the intensity attenuation rate at the peak of emission wavelength is reduced, delaying the fluorescence quenching
process. |
| keywords:cesium lead iodide dilution time stability |
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