A TiO2nanotube network electron transport layer for high efficiency perovskite solar cells.
The electron transport layer (ETL) plays a critical role in high efficiency perovskite solar cells. In this study, an anodic TiO2nanotube film was transformed into a TiO2nanotube network film, which maintained its advantage as an efficient ETL for perovskite solar cells. Compared with the mesoporous TiO2nanoparticle ETL, the TiO2nanotube network ETL can increase the efficiency of perovskite solar cells by 26.6%, which is attributed to its superior charge collection property and light trapping ability. The results confirm the importance of optimizing the electron collecting layer and suggest another way to design and fabricate novel perovskite solid state solar cells, potentially by using a TiO2nanotube network film as an alternative high efficiency electrode.
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Ohio, 44106, USA. chris.yuan@case.edu and Department of Mechanical Engineering, University of Wisconsin Milwaukee, Wisconsin, 53211, USA.
Xianfeng
X
Gao
Department of Mechanical Engineering, University of Wisconsin Milwaukee, Wisconsin, 53211, USA.
Jianyang
J
Li
Department of Mechanical Engineering, University of Wisconsin Milwaukee, Wisconsin, 53211, USA.
Sam
S
Gollon
Department of Mechanical Engineering, University of Wisconsin Milwaukee, Wisconsin, 53211, USA.
Ming
M
Qiu
Department of Mechanical Engineering, University of Wisconsin Milwaukee, Wisconsin, 53211, USA.
Dongsheng
D
Guan
Department of Mechanical Engineering, University of Wisconsin Milwaukee, Wisconsin, 53211, USA.
Xiaoru
http://orcid.org/0000-0002-5636-9312
X
Guo
Department of Mechanical Engineering, University of Wisconsin Milwaukee, Wisconsin, 53211, USA.
Junhong
J
Chen
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Ohio, 44106, USA. chris.yuan@case.edu and Department of Mechanical Engineering, University of Wisconsin Milwaukee, Wisconsin, 53211, USA.
Chris
http://orcid.org/0000-0001-9844-4854
C
Yuan