Special Section on Organic Photovoltaics

Enhancement of poly(3-hexylthiophene)-based solar cell with thermal-evaporated [6,6]-phenyl-C60 butyric acid methyl ester layers

[+] Author Affiliations
Wei-Hsuan Tseng, Jeng-Yu Wang, Chung-Yen Wang, Hung Lo, Chih-I Wu

National Taiwan University, Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, Taipei 106, Taiwan

Mei-Hsin Chen

National Dong Hwa University, Department of Opto-Electronic Engineering, Hualien 974, Taiwan

J. Photon. Energy. 2(1), 021009 (Apr 27, 2012). doi:10.1117/1.JPE.2.021009
History: Received October 13, 2011; Revised February 20, 2012; Accepted February 28, 2012
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Abstract.  We provide a more compact fabrication process than the prior work using [6,6]-phenyl C61-butyric acid methyl ester (PCBM) buffer layer to enhance the performance of organic solar cells. The device with an extra PCBM layer exhibits an improved power conversion efficiency (PCE) of 20% as compared with the devices with conventional structures. Ultraviolet and x-ray photoemission spectroscopy indicate that thermal annealing treatments result in better mixture structures of PCBM layers with poly(3-hexylthiophene) at the blended surfaces. Therefore, the device with inserted PCBM provides more ideal hetero-structures and vertically graded PCBM distribution to optimize the charge extraction efficiency.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Wei-Hsuan Tseng ; Jeng-Yu Wang ; Mei-Hsin Chen ; Chung-Yen Wang ; Hung Lo, et al.
"Enhancement of poly(3-hexylthiophene)-based solar cell with thermal-evaporated [6,6]-phenyl-C60 butyric acid methyl ester layers", J. Photon. Energy. 2(1), 021009 (Apr 27, 2012). ; http://dx.doi.org/10.1117/1.JPE.2.021009


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