Article Title

Interface engineering of high efficiency perovskite solar cells based on ZnO nanorods using atomic layer deposition

Authors

Shibin Li, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China
Peng Zhang, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China
Yafei Wang, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China
Hojjatollah Sarvari, Department of Electrical & Computer Engineering and Center for Nanoscale Science & Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
Detao Liu, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China
Jiang Wu, Department of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
Yajie Yang, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China
Zhiming Wang, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
Zhi David Chen, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China Department of Electrical & Computer Engineering and Center for Nanoscale Science & Engineering, University of Kentucky, Lexington, Kentucky 40506, USA

Keywords

perovskite solar cell, ZnO nanorods, oxygen vacancy, Al2O3 monolayer, charge recombination

Abstract

ABSTRACT 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 selfassembly 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..

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-016-1407-0

Publisher

Tsinghua University Press

Recommended Citation

Shibin Li,Peng Zhang,Yafei Wang,Hojjatollah Sarvari,Detao Liu,Jiang Wu,Yajie Yang,Zhiming Wang,Zhi David Chen, Interface engineering of high efficiency perovskite solar cells based on ZnO nanorods using atomic layer deposition. NanoRes.2017, 10(3): 1092–1103