Article Title
CuI-Si heterojunction solar cells with carbon nanotube films as flexible top-contact electrodes
Authors
Peixu Li, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Shanshan Wang, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
College of Engineering, Peking University, Beijing 100871, China
Yi Jia, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Zhen Li, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Chunyan Ji, College of Engineering, Peking University, Beijing 100871, China
Luhui Zhang, College of Engineering, Peking University, Beijing 100871, China
Hongbian Li, College of Engineering, Peking University, Beijing 100871, China
Enzheng Shi, College of Engineering, Peking University, Beijing 100871, China
Zuqiang Bian, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Chunhui Huang, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Jinquan Wei, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Kunlin Wang, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Hongwei Zhu, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China
Dehai Wu, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Anyuan Cao, College of Engineering, Peking University, Beijing 100871, China
Keywords
Carbon nanotubes, flexible electrodes, heterojunction solar cells
Abstract
We report the fabrication of CuI–Si heterojunction solar cells with carbon nanotubes (CNTs) as a transparent electrode. A flexible CNT network was transferred onto the top of a polycrystalline CuI layer, making a conformal coating with good contact with the underlying CuI. The solar cells showed power conversion efficiencies in the range of 6% to 10.5%, while the efficiency degradation was less than 10% after the device was stored in air for 8 days. Compared with conventional rigid electrodes such as indium tin oxide (ITO) glass, the flexibility of the CNT films ensures better contact with the active layers and removes the need for press-contact electrodes. Degraded cells can recover their original performance by acid doping of the CNT electrode. Our results suggest that CNT films are suitable electrical contacts for rough materials and structures with an uneven surface.
Graphical Abstract
Publisher
Tsinghua University Press
Recommended Citation
Peixu Li,Shanshan Wang,Yi Jia,Zhen Li,Chunyan Ji,Luhui Zhang,Hongbian Li,Enzheng Shi,Zuqiang Bian,Chunhui Huang,Jinquan Wei,Kunlin Wang,Hongwei Zhu,Dehai Wu,Anyuan Cao, CuI-Si heterojunction solar cells with carbon nanotube films as flexible top-contact electrodes. NanoRes.2011, 4(10): 979–986
