发光学报, 2015, 36 (4): 443, 网络出版: 2015-04-14
不同环境压强下溶剂退火对聚合物太阳能电池性能的影响
Effect of Variation in Environmental Pressure of Solvent Annealing on The Performance of Polymer Solar Cells
聚合物太阳能电池 环境压强 加压溶剂退火 polymer solar cells environmental pressure solvent annealing under high pressure
摘要
通过改变溶剂退火时的环境压强控制溶剂的蒸发速率,在不同压强下进行加压溶剂退火制备了基于聚-3己基噻吩∶富勒烯衍生物(P3HT∶PCBM)的体异质结聚合物太阳能电池.X射线衍射(XRD)、紫外-可见吸收光谱(UV-Vis)以及原子力显微镜(AFM)的测试结果表明,增大溶剂退火的环境气压改善了薄膜的结晶度,增强了有源层的光吸收,提高了P3HT和PCBM的相分离程度,更有利于激子的解离和载流子传输.与在常压下溶剂退火相比,在2.0 MPa压强下对有源层进行溶剂退火的器件的光电转换效率提高了29%,达到了3.69%.
Abstract
Polymer solar cells based on blends of poly(3-hexylthiophene) (P3HT) and ［6,6］-phenyl-C61-butyric acid methyl ester (PCBM) were fabricated by solvent annealing under different environmental pressures.The performance of the solar cells were tested by X-ray diffraction (XRD),atomic force microscopy (AFM) images and absorption spectra.By increasing the environmental pressure of solvent annealing,the optical absorption of the active layer was enhanced,the crystallinity of the active layer and the phase segregation of P3HT and PCBM were improved,which facilitated photogenerated exciton dissociation and charge-carrier transport.The power conversion efficiency of the polymer solar cell fabricated by solvent annealing under 2.0 MPa is 3.69%,which is 29% higher than that of the one fabricated under atmosphere pressure.
郑力华, 张健, 邢聪, 周发, 许文鹏, 李传南. 不同环境压强下溶剂退火对聚合物太阳能电池性能的影响[J]. 发光学报, 2015, 36(4): 443. ZHENG Li-hua, ZHANG Jian, XING Cong, ZHOU Fa, XU Wen-peng, LI Chuan-nan. Effect of Variation in Environmental Pressure of Solvent Annealing on The Performance of Polymer Solar Cells[J]. Chinese Journal of Luminescence, 2015, 36(4): 443.
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