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 CsPb_xMn_1–xCl₃ NCs. Different from other PIEE phenomena, the PIEE of CsPb_xMn_1–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 CsPb_xMn_1–xCl₃ NCs exhibited better environmental suitability and worked under high pressure. Our studies explored the relationship between bandgap microstructure and optical properties of CsPb_xMn_1–xCl₃ NCs at high pressure and also gave insights into the optimization of photovoltaic performance, which promoting the design of functional MHPs.

中文翻译：

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Mn ²⁺掺杂的氯化铅铅钙钛矿纳米晶体的压力诱导发射增强。

金属卤化物钙钛矿（MHP）由于在光伏设备（例如太阳能电池）中的出色性能而备受关注。但是，由于发射强度和性能之间的关键关系，光发射的压力猝灭极大地限制了MHP的潜在应用。在这里，我们报道了CsPb _x Mn _{1– x} Cl ₃ NCs独特的压力诱导排放增强（PIEE）。与其他PIEE现象不同，CsPb _x Mn _{1- x} Cl ₃ NCs的PIEE是由能量释放从⁴ T ₁增强到⁶ A _1引起的Mn的变化，归因于压力诱导的同构相变。同时，光致发光（PL）可以一直存在到接近20 GPa，这表明CsPb _x Mn _{1– x} Cl ₃ NCs表现出更好的环境适应性并且可以在高压下工作。我们的研究探索了高压下CsPb _x Mn _{1- x} Cl ₃ NC的带隙微观结构与光学性能之间的关系，并为优化光伏性能提供了见识，从而促进了功能MHP的设计。