Berlin 2018 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
HL: Fachverband Halbleiterphysik
HL 13: Poster Session I
HL 13.49: Poster
Monday, March 12, 2018, 17:30–19:30, Poster B
High Performance Planar Perovskite Solar Cells by ZnO Electron Transport Layer Engineering — •qingzhi an1,2, paul fassl1,2, yvonne jasmin hofstetter1,2, david becker koch1,2, alexandra bausch1,2, paul hopkinson1,2, and yana vaynzof1,2 — 1kirchhoff institute for pyhsics,heidelberg,germany — 2centre for advanced materials,heidelberg,germany
Due to the many advantageous properties of ZnO, such as high electron mobility and low processing temperatures, it is commonly used as an electron extraction layer in organic photovoltaic devices. However, it has been reported that ZnO cannot be successfully utilized in perovskite photovoltaics due to surface hydroxide groups induced instabilities in the perovskite layers. In this work, we modify the bulk ZnO layer by incorporating Cs or Li dopants and the surface of ZnO layer by depositing a self-assembled monolayer and demonstrate that this combined approach leads to significant improvements in the performance of planar MAPBI3 perovskite solar cells. A maximum power conversion efficiency of 18% is achieved accompanied by a reduction in hysteresis and a significant enhancement of the device stability.[1] Our work shows that ZnO can serve as a practical alternative to TiO2 in standard perovskite solar cells with low fabrication temperatures.
[1] Q. An, P. Fassl, Y. J. Hofstetter, D. Becker-Koch, A. Bausch, P. E. Hopkinson and Y. Vaynzof, "High Performance Planar Perovskite Solar Cells by ZnO Electron Transport Layer Engineering" Nano Energy 39, 400 (2017).