Efficient Poly(3-hexylthiophene)-Based Bulk Heterojunction Solar Cells Fabricated by an Annealing-Free Approach
Efficient Poly(3-hexylthiophene)-Based Bulk Heterojunction Solar Cells Fabricated by an Annealing-Free Approach
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DOI：
10.1021/jp804909a
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发表时间：
2008-10
影响因子：
3.7
通讯作者：
Y. Chang;L. Wang
中科院分区：
文献类型：
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作者：
Y. Chang;L. Wang
A simple method for preparing spin-coated photoactive films with high crystalline poly(3-hexylthiophene) (P3HT) without annealing was developed. It involves the incorporation of a small amount of the P3HT monomer, 3-hexylthiophene (3HT), into the P3HT/[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) solution from which the films were prepared. The UV−visible spectrum of the thus-prepared film includes pronounced crystallization peaks with higher absorbance over the whole range of wavelengths, 450−650 nm, than that of the film prepared from a coating solution without 3HT. X-ray diffraction (XRD) data also reveal a smaller interlayer distance between conjugated backbones in the 3HT-processed film than the conventional film. The TEM image of the as-cast 3HT-processed film demonstrates a nanoscaled phase separation and interpenetrating network morphology like those of a thermally annealed conventional film. Polymer solar cells based on such 3HT-processed bulk heterojunction films exhibit an enhanced photocur...
