Organic-inorganic perovskites have arrived at the forefront of solar technology due to their impressive carrier lifetimes and superior optoelectronic properties. By having the cm-sized perovskite single crystal and employing device patterning techniques, and the transfer length method (TLM), we are able to get the insight into the metal contact and carrier transport behaviors, which is necessary for maximizing device performance and efficiency. In addition to the metal work function, we found that the image force and interface charge pinning effects also affect the metal contact, and the studied single crystal CH₃NH₃PbBr₃ features Schottky barriers of 0.17 eV, 0.38 eV, and 0.47 eV for Au, Pt, and Ti electrodes, respectively. Furthermore, the surface charges lead to the thermally activated transport from 207 K to 300 K near the perovskite surface. In contrast, from 120 K to 207 K, the material exhibited three-dimensional (3D) variable range hopping (VRH) carrier transport behavior. Understanding these fundamental contact and transport properties of perovskite will enable future electronic and optoelectronic applications.

有机-无机钙钛矿因其令人印象深刻的载流子寿命和卓越的光电性能而成为太阳能技术的最前沿。通过拥有厘米大小的钙钛矿单晶并采用器件构图技术和转移长度方法（TLM），我们能够洞悉金属接触和载流子传输行为，这对于最大化器件性能和效率是必不可少的。除金属功函数外，我们还发现成像力和界面电荷钉扎效应也影响金属接触，并且研究了单晶CH ₃ NH ₃ PbBr ₃对于Au，Pt和Ti电极，其特征分别为0.17 eV，0.38 eV和0.47 eV的肖特基势垒。此外，表面电荷导致在钙钛矿表面附近从207 K到300 K的热活化传输。相反，从120 K到207 K，该材料表现出三维（3D）可变范围跳跃（VRH）载流子传输行为。了解钙钛矿的这些基本接触和传输特性将使将来的电子和光电应用成为可能。