题目：

CH₃NH₃PbI_3−xCl_x under Different Fabrication Strategies: Electronic Structures and Energy-Level Alignment with an Organic Hole Transport Material

作者：

Rongbin Wang,^†,‡Chen Wu,^†Yun Hu,^†Jitao Li,^†Pengfei Shen,^†Qi Wang,^†Liangsheng Liao,^†Lijia Liu,^*,†and Steffen Duhm^†

单位：

^†Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Institute of Functional Nano & Soft Materials(FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, China

^‡Institut für Physik, Humboldt-Universitätzu Berlin, Brook-Taylor Straße 6, 12489 Berlin, Germany

摘要：

We report a photoelectron spectroscopy study on the electronic structure of CH₃NH₃PbI_3−xCl_x thin films fabricated by physical evaporation from CH₃NH₃I and PbCl₂ precursors, including (1) simultaneously evaporation and (2) sequential evaporation. The results are compared with CH₃NH₃PbI_3−xCl_xmade using conventional solution chemistry (i.e., spin-coating). Depending on the fabrication method, CH₃NH₃PbI_3−xCl_x films show different chemical constituents in the near-surface region, leading to disparities in their energetic levels. The chemical identities of the surface species are revealed by an in situ study on the sequentially evaporated film. Moreover, air-exposure treatment also greatly alters the energetic levels of the film. Using hole transport layer of N;N′-di(1-naphthyl)-N,N′-diphenylbenzidine (NPB) as a model system, we find that the energy-level alignment with the spin-coated film after air exposure is most suitable for efficient hole transport.

影响因子：

7.145

分区情况：

一区

链接：

http://www.sciencedirect.com/science/article/pii/S0169433216324825