Efficiency Improvement of Organic Solar Cells by Slow Growth and Changing Spin-Coating Parameters for Active Layers

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概要

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• The derivatives of C60, [6,6]-phenyl C61-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%.

• 2011-02-25

著者

• Tsai Yu-sheng

  Institute Of Electro-optical And Materials Science National Formosa University

• Hsieh Tsung-eong

  Department Of Materials Science And Engineering National Chiao Tung University

• Chang Ming-Hua

  Department of Materials Science and Engineering, National Chiao-Tung University, Hsinchu 30010, Taiwan

• Liu Mark

  Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan

• Chu Wei-Ping

  Institute of Electro-Optical and Materials Science, National Formosa University, Huwei, Yunlin 63208, Taiwan

• Tang Rong-Ming

  Institute of Electro-Optical and Materials Science, National Formosa University, Huwei, Yunlin 63208, Taiwan

• Juang Fuh-Shyung

  Institute of Electro-Optical and Materials Science, National Formosa University, Huwei, Yunlin 63208, Taiwan

• Chang Ming-Hua

  Department of Material Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan

• Hsieh Tsung-Eong

  Department of Material Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan

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