Organolead halide perovskites (OHPs) have attracted great attention as a promising candidate for optoelectronic applications. However, a series of abnormal photoelectric properties such as slow photo response, large hysteresis in current−voltage curves caused by ion migration, deteriorated the reliability of OHPs-based devices. In this paper, we have fabricated CH₃NH₃PbBr₃ (MAPbBr₃) single crystal devices with coplanar and sandwich electrode structure and studied their ion migration phenomenon. Devices with coplanar structure exhibits a more stable temporal response curves, and a much larger ion activation energy (418 meV) than sandwich structure devices (88 meV). The results suggested that compared to sandwich structure devices, ion transport in coplanar structure devices is more diffcult, which indicates that ion migration in perovskites can be adjusted by changing the electron transport channels.

有机光卤化物钙钛矿（OHP）作为光电子应用的有前途的候选物已引起了极大的关注。但是，一系列异常的光电特性，例如缓慢的光响应，由离子迁移引起的电流-电压曲线中的大滞后，使基于OHP的设备的可靠性下降。在本文中，我们制备了CH ₃ NH ₃ PbBr ₃（MAPbBr ₃）具有共面和夹层电极结构的单晶器件，并研究了它们的离子迁移现象。具有共面结构的器件与三明治结构的器件（88 meV）相比，具有更稳定的时间响应曲线和更大的离子活化能（418 meV）。结果表明，与夹层结构器件相比，共面结构器件中的离子迁移更加困难，这表明可以通过改变电子传输通道来调节钙钛矿中的离子迁移。