Double-walled carbon nanotube solar cells.
We directly configured double-walled carbon nanotubes as energy conversion materials to fabricate thin-film solar cells, with nanotubes serving as both photogeneration sites and a charge carriers collecting/transport layer. The solar cells consist of a semitransparent thin film of nanotubes conformally coated on a n-type crystalline silicon substrate to create high-density p-n heterojunctions between nanotubes and n-Si to favor charge separation and extract electrons (through n-Si) and holes (through nanotubes). Initial tests have shown a power conversion efficiency of >1%, proving that DWNTs-on-Si is a potentially suitable configuration for making solar cells. Our devices are distinct from previously reported organic solar cells based on blends of polymers and nanomaterials, where conjugate polymers generate excitons and nanotubes only serve as a transport path.
Wei
Jinquan
J
Key Lab for Advanced Manufacturing by Materials Processing Technology of Education Ministry, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China. jqwei@mail.tsinghua.edu.cn
Jia
Yi
Y
Shu
Qinke
Q
Gu
Zhiyi
Z
Wang
Kunlin
K
Zhuang
Daming
D
Zhang
Gong
G
Wang
Zhicheng
Z
Luo
Jianbin
J
Cao
Anyuan
A
Wu
Dehai
D
D003460:Crystallization / Q000379:methods*; D011211:Electric Power Supplies; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D008839:Microelectrodes; D008968:Molecular Conformation; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D010316:Particle Size; D012993:Solar Energy; D013499:Surface Properties
D037742:Nanotubes, Carbon