posted on 2020-03-11, 18:38authored byYe Cao, Guangyu Qi, Laizhi Sui, Yue Shi, Ting Geng, Dianlong Zhao, Kai Wang, Kaijun Yuan, Guorong Wu, Guanjun Xiao, Siyu Lu, Bo Zou
Metal-halide
perovskites (MHPs) have attracted tremendous attention
because of their excellent performance in photovoltaic devices, such
as solar cells. However, because of the crucial relationship between
emission intensity and performance, pressure-quenching of optical
emission greatly restrict the potential application of MHPs. Here,
we reported the unique pressure-induced emission enhancement (PIEE)
of CsPbxMn1–xCl3 NCs. Different from other PIEE phenomena, the
PIEE of CsPbxMn1–xCl3 NCs was caused by the enhancement of energy
release from 4T1 to 6A1 of the Mn, attributed to the pressure-induced isostructural phase
transition. Meanwhile, the photoluminescence (PL) can exist until
almost 20 GPa, suggesting that CsPbxMn1–xCl3 NCs exhibited better
environmental suitability and worked under high pressure. Our studies
explored the relationship between bandgap microstructure and optical
properties of CsPbxMn1–xCl3 NCs at high pressure and also gave
insights into the optimization of photovoltaic performance, which
promoting the design of functional MHPs.