Despite the considerably improved efficiency of inorganic–organic metal hybrid perovskite solar cells (PSCs), electron transport is still a challenging issue. In this paper, we report the use of ZnO nanorods prepared by hydrothermal self-assembly as the electron transport layer in perovskite solar cells. The efficiency of the perovskite solar cells is significantly enhanced by passivating the interfacial defects via atomic layer deposition of Al2O3 monolayers on the ZnO nanorods. By employing the Al2O3 monolayers, the average power conversion efficiency of methylammonium lead iodide PSCs was increased from 10.33% to 15.06%, and the highest efficiency obtained was 16.08%. We suggest that the passivation of defects using the atomic layer deposition of monolayers might provide a new pathway for the improvement of all types of PSCs. [Figure not available: see fulltext.]
|Number of pages||12|
|State||Published - Mar 1 2017|
Bibliographical noteFunding Information:
This work was supported by National Natural Science Foundation of China (Nos. 61474016, 61405026, 61371046, 61421002, 6157031208, and 61471085), and National Higher-education Institution General Research and Development Fund (No. ZYGX2014J044), Projects of International Cooperation of Sichuan Province (No. 2014HH0041). University of Kentucky also partially supported this work.
© 2016, Tsinghua University Press and Springer-Verlag Berlin Heidelberg.
- AlO monolayer
- ZnO nanorods
- charge recombination
- oxygen vacancy
- perovskite solar cell
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Materials Science (all)
- Condensed Matter Physics
- Electrical and Electronic Engineering