Xiong et al., Direct Observation on p- to n-Type Transformation of Perovskite Surface Region during Defect Passivation Driving High Photovoltaic Efficiency, Joule 2021, https://doi.org/10.1016/j.joule.2020.12.009

該文報(bào)道了通過在鈣鈦礦MAPbI3添加天然辣椒素，首次直接觀察到缺陷鈍化過程中MAPbI3表面區(qū)域從p到n型的完全轉(zhuǎn)變過程，這歸因于鈣鈦礦活性層中p-n同質(zhì)結(jié)的自發(fā)形成。在鈣鈦礦中加入辣椒素后，MAPbI3的功函數(shù)降低了470 meV，費(fèi)米能級(jí)與價(jià)帶頂?shù)牟钪狄矎?.55 eV變化為1.03 eV，表明MAPbI3的表面發(fā)生了P-N型的完全轉(zhuǎn)變（圖1C）。

Ju H, Knesting KM, Zhang W et al.. Interplay between Interfacial Structures and Device Performance in Organic Solar Cells: A Case Study with the Low Work Function Metal, Calcium. ACS Appl Mater Interfaces. 2016 Jan 27; 8(3):2125-31. https://doi.org/10.1021/acsami.5b10641.