Improved Device Performance of Polymer Solar Cells by Using a Thin Light-harvesting-Complex Modified ZnO Film as the Cathode Interlayer.
In this study, a high-performance inverted polymer solar cell (PSC) has been fabricated by incorporating a zinc oxide (ZnO)/light-harvesting complex II (LHCII) stacked structure as the cathode interlayer. The LHCII not only smoothens the film surface of ZnO, improves the contact between ZnO and the photoactive layer, but also suppresses the charge carrier recombination at the interface, hence all the device parameters of PTB7-based solar cells are simultaneously improved, yielding higher power conversion efficiency (PCE) up to 9.01% compared with the control one (PCE 8.01%). And the thin LHCII modification layer also presents similar positive effects in the PTB7-Th:PC71BM system (PCE from 8.31% to 9.60%). These results put forward a facile approach to the interfacial modification in high-performance PSCs and provide new insight into developing and utilizing inexpensive and environmentally friendly materials from the fields of biological photosynthesis.
Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences , Beijing 100093, China.|Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, China.
Xiaohui
X
Liu
Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences , Beijing 100093, China.
Cheng
C
Liu
Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences , Beijing 100093, China.
Ruixue
R
Sun
Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences , Beijing 100093, China.
Kun
K
Liu
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, China.
Yajie
Y
Zhang
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, China.
Hai-Qiao
HQ
Wang
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, China.
Junfeng
J
Fang
Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences , Beijing 100093, China.
Chunhong
C
Yang
LHCII; ZnO nanoparticles; cathode; inverted polymer solar cells; modification interlayer