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制备ITO/PEDOT:PSS/PCPDTBT:PC61BM聚合物薄膜,研究了成膜添加剂DMI对ITO/PEDOT:PSS/PCPDTBT:PCBM/A1的聚合物薄膜性能的影响。结果表明,成膜添加剂DMI使PCPDTBT:PCBM光敏层的吸收峰红移,所制备出的太阳能电池的性能得到大幅度提高。DMI使薄膜中产生纳米尺度的两相分离,增大了给体与受体间的界面接触,提高了光生激子的分离效率,增大了电子的迁移率和电极收集载流子的效率,从而提高了器件的性能。在强度为100 mW·cm~(-2)的光照下,太阳能电池的填充因子FF为0.38,能量转换效率η为2.64%,开路电压Voc为0.66 V,短路电流密度Jsc为10.42 mA·cm~(-2)。
The effects of film-forming additive DMI on the properties of ITO / PEDOT: PSS / PCPDTBT: PCBM / A1 polymer films were investigated. The results showed that the DMI of the film forming additive red shifted the absorption peak of the PCPDTBT: PCBM photosensitive layer, and the performance of the prepared solar cell was greatly improved. DMI causes nanoscale two-phase separation in the film, increases the contact between the donor and the acceptor, improves the separation efficiency of the photoexcitation exciton, increases the mobility of the electrons and the efficiency of collecting the carriers by the electrodes, Thus improving the performance of the device. Under the illumination intensity of 100 mW · cm -2, the solar cell filled factor FF is 0.38, the energy conversion efficiency η is 2.64%, the open circuit voltage Voc is 0.66 V, the short circuit current density Jsc is 10.42 mA · cm ~ (-2).