標題: Efficiency Improvement of Organic Solar Cells by Slow Growth and Changing Spin-Coating Parameters for Active Layers
作者: Tsai, Yu-Sheng
Chu, Wei-Ping
Juang, Fuh-Shyung
Tang, Rong-Ming
Chang, Ming-Hua
Hsieh, Tsung-Eong
Liu, Mark O.
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 1-二月-2011
摘要: The derivatives of C60, [6,6]-phenyl C(61)-butyric acid methyl ester (PCBM), and 3-hexylthiophene (P3HT) were dissolved in o-dichlorobenzene (DCB) solvent, and then spin-coated as an active layer for polymer solar cells. The experimental parameters including the spin-coating speed and drying conditions for the active layer, were studied carefully to obtain the optimum power conversion efficiency (PCE). In the active layer drying procedure, the DCB solvent saturated/unsaturated vapor pressure was adjusted by controlling the amount of solvent at a half-open capacity. The DCB solution was used to enhance the self-organization of the active layer of P3HT and to reduce the number of pure PCBM clusters. In the DCB optimum solution, the PCE of a polymer solar cell can be increased from 1.36 to 1.79%. The structure corresponds to a nano-to-micron scale ordering in the unsaturation-treatment films. In the optimum unsaturation procedure, the PCE of a polymer solar cell can be increased from 1.79 to 2.53%. Using two steps with optimum rotation speeds in the active layer spin-coating, the surface uniformity can be improved, with the PCE increased from 2.53 to 3.13%. (C) 2011 The Japan Society of Applied Physics
URI: http://dx.doi.org/10.1143/JJAP.50.022301
http://hdl.handle.net/11536/25797
ISSN: 0021-4922
DOI: 10.1143/JJAP.50.022301
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS
Volume: 50
Issue: 2
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