钙钛矿与过渡金属硫族化合物范德华异质结光电探测器的研究进展
Recent Advances in Photodetectors Based on Van Der Waals Heterostructures of Perovskites and Transition Metal Dichalcogenides
DOI: 10.12677/app.2026.166056, PDF,   
作者: 董子衿：天津工业大学物理科学与技术学院，天津
关键词: 光电探测器；过渡金属硫族化合物；钙钛矿；异质结；Photodetector； Transition Metal Dichalcogenides； Perovskite； Heterojunction
摘要: 单层过渡金属硫族化合物(TMDs)与金属卤化物钙钛矿构成的异质结由于其优异性能，在新一代光电器件领域展现出巨大的应用潜力，也引起了研究领域人们的广泛兴趣。一方面，TMDs材料因维度降低带来弱介电屏蔽，具有较高的激子结合能。同时，强自旋–轨道耦合在K点诱导出显著的价带自旋分裂，赋予其较大的自旋轨道分裂能，为光电器件研究提供了重要平台。另一方面，金属卤化物钙钛矿是一种可溶液制备的半导体，具有强光吸收、成分可调、长载流子寿命和长扩散距离等优点。与激子结合能普遍高于250 meV的有机半导体不同，有机–无机卤化物钙钛矿的激子结合能仅约30 meV，表明光激发产生的激子更易解离为自由电子和空穴，有利于激子分离和电荷转移。因此，将具有高光吸收系数的钙钛矿(如纳米线、量子点或薄膜)与单层TMDs结合构建异质结，可实现独特的光电性能调控，为高性能光电探测器的研发开辟新路径。
Abstract: Van der Waals heterostructures formed by monolayer transition metal dichalcogenides (TMDs) and metal halide perovskites have attracted extensive attention and exhibit great potential for next-generation optoelectronic devices. On the one hand, reduced dimensionality in TMDs leads to weak dielectric screening and thus large exciton binding energies. Meanwhile, strong spin-orbit coupling induces pronounced valence band splitting at the K point, endowing these materials with sizable spin-orbit splitting and making them an excellent platform for optoelectronic device research. On the other hand, metal halide perovskites are solution-processable semiconductors featuring strong light absorption, tunable composition, long carrier lifetimes, and extended diffusion lengths. Unlike organic semiconductors with exciton binding energies typically exceeding 250 meV, organic–inorganic halide perovskites exhibit much lower values (~30 meV), indicating that photogenerated excitons can readily dissociate into free carriers, thereby facilitating exciton separation and interfacial charge transfer. Therefore, integrating high-absorption perovskites (e.g., nanowires, quantum dots, or thin films) with monolayer TMDs to construct heterostructures enables unique optoelectronic modulation and opens new avenues for high-performance photodetectors.
文章引用：董子衿. 钙钛矿与过渡金属硫族化合物范德华异质结光电探测器的研究进展[J]. 应用物理, 2026, 16(6): 614-625. https://doi.org/10.12677/app.2026.166056

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