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采用匀胶机旋涂成膜的方法在手套箱中制备了P3HT:PCBM薄膜,详细研究了退火处理对薄膜的吸收、晶体结构以及表面形貌的影响,并全面阐述了它们之间的联系。结果发现退火后薄膜的吸收增强,吸收峰的峰位有所红移,通过XRD测试研究表明是因为薄膜出现了不同程度的晶化,主要是P3HT发生了部分晶化。对表面形貌进一步研究发现退火后薄膜的表面粗糙度有所增加,并形成了一定清晰可见的互穿网络,薄膜发生品化,使薄膜性能得到大大改善。将优化得到的材料用于太阳电池中,电池结构为glass/ITO/PEDOT:PSS/P3HT:PCBM/Al,在AM1.5,100mW/cm~2条件下测试获得电池效率1.41%。
P3HT: PCBM thin films were prepared in a glove box using a spin coater with a spin coater. The effects of annealing treatment on the absorption, crystal structure and surface morphology of the films were investigated in detail. The results show that after annealing, the absorption of the film is enhanced and the peak of the absorption peak is red-shifted. The XRD results indicate that the film is crystallized to some extent, mainly due to the partial crystallization of P3HT. Further study of the surface topography showed that the surface roughness of the annealed film increased, and a certain clearly visible interpenetrating network was formed. The film was melted and the film performance was greatly improved. The optimized material was used in the solar cell, the cell structure was glass / ITO / PEDOT: PSS / P3HT: PCBM / Al, and the cell efficiency was 1.41% under the condition of AM1.5 and 100mW / cm ~