Graduate School of Science , Chiba University , 1-33 Yayoi , Inage, Chiba 263-8522 , Japan.
Langmuir. 2018 Sep 4;34(35):10250-10253. doi: 10.1021/acs.langmuir.8b01615. Epub 2018 Aug 23.
Perovskites have been attracting attention because of their considerable luminescence properties. A conventional perovskite such as BaTiO has no intrinsic photoluminescence. Doping with rare metals, nanocrystallization, and addition of organometallic halides induce significant photoluminescence and photovoltages. Here, we report anomalous light reflection and photoluminescence of BaTiO on heating. Light absorption shifted from the near-ultraviolet region to the visible region on heating. The small emission peaks at around 400-500 nm disappeared and new peaks appeared above 800 nm; the quantum yields of these peaks were less than 1% and more than 7%, respectively.
钙钛矿因其显著的发光性能而备受关注。传统钙钛矿如 BaTiO 本身没有本征光致发光。掺杂稀有金属、纳米晶化和添加有机卤化物会引起显著的光致发光和光电压。在这里，我们报告了 BaTiO 在加热时异常的光反射和光致发光。随着加热，光吸收从近紫外区域转移到可见光区域。在 400-500nm 左右的小发射峰消失，在 800nm 以上出现新的峰；这些峰的量子产率分别小于 1%和大于 7%。
