Organic solar cells using few-walled carbon nanotubes electrode controlled by the balance between sheet resistance and the transparency

Feng, Yiyu; Ju, Xiaohui; Feng, Wei; Zhang, Hongbo; Cheng, Yingwen; Liu, Jie; Fujii, Akihiko; Ozaki, Masanori; Yoshino, Katsumi
March 2009
Applied Physics Letters;3/23/2009, Vol. 94 Issue 12, p123302
Academic Journal
Organic photovoltaic devices (OPD) using high conductive transparent few-walled carbon nanotubes (FWNT) film prepared by spraying was fabricated as a selective hole collection. Photovoltaic response with different sheet resistance (Rs) and the transparency (T) of FWNT film was investigated. Maximum efficiency of OPD up to 0.61% with the structure of FWNT (T=70%, Rs=86 Ω/□)/poly(3-hexylthiophene): [6-6]phenyl-C61-butyric acid methyl ester/Al demonstrates a promising alternative of ITO (0.68%) with almost identical operation. The performance improvement results from the optimal balance between sheet resistance and transparency with three-dimensional network interface between nanotubes and polymers.


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