Abstract In this study, CsPb1–x Mn x Br3–2x Cl2x (x = 0–0.5) nanoparticles were synthesized directly in toluene solvents at high temperature. This approach results in small-size nanoparticles, which can be used in photoelectric components without adding a filtration process to eliminate high-temperature solvents such as octadecene. The high content Mn2+-incorporated CsPb(Cl/Br)3 host is observed by strongly wideband emission at 592 nm of manganese d-states spin and orbital forbidden transition. After infiltration into mesoporous TiO2, the Mn2+ ion receives energy from the CsPb(Cl/Br)3 host (irradiated 405 nm light-emitting diode source) and effectively transfers to the TiO2 scaffold layer. As a result, a metal/semiconductor/metal planar structure photodetector with m-TiO2/CsPb1–x Mn x Br3–2x Cl2x (x = 0–0.5) composite showed several figures of merit compared to bare m-TiO2 and m-TiO2/CsPbBr3 such as on/off ratio of 104 times, responsivity of 1.67 A·W−1, and detectivity of 4.42 × 109 Jones. The key factors contributing to the growth of the on/off ratio include the decreasing dark current and enhancing exciton energy and transportation due to the infiltration of CsPb1–x Mn x Br3–2x Cl2x (x = 0–0.5) perovskite quantum dots into mesopores of the m-TiO2 scaffold layer.

中文翻译：

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CsPb1−x Mn x Br3−2x Cl2x (x = 0–0.5) 量子点的制造，用于近紫外光电探测器应用

摘要 在这项研究中，CsPb1–x Mn x Br3–2x Cl2x (x = 0–0.5) 纳米颗粒在高温下直接在甲苯溶剂中合成。这种方法产生了小尺寸的纳米粒子，可用于光电元件，而无需添加过滤过程以消除高温溶剂，如十八碳烯。通过锰 d 态自旋和轨道禁跃跃迁在 592 nm 处的强宽带发射观察到高含量 Mn2+ 结合的 CsPb(Cl/Br)3 主体。Mn2+ 离子渗入介孔 TiO2 后，从 CsPb(Cl/Br)3 主体（照射的 405 nm 发光二极管源）接收能量并有效转移到 TiO2 支架层。因此，与裸 m-TiO2 和 m-TiO2/CsPbBr3 相比，具有 m-TiO2/CsPb1–x Mn x Br3–2x Cl2x (x = 0–0.5) 复合材料的金属/半导体/金属平面结构光电探测器显示出多个品质因数，例如开/关比为 104 倍，响应率为 1.67 A·W-1，检测率为 4.42 × 109 Jones。促成开/关比增长的关键因素包括由于 CsPb1–x Mn x Br3–2x Cl2x (x = 0–0.5) 钙钛矿量子点渗透到介孔中而导致的暗电流降低和激子能量和传输增强m-TiO2 支架层。