Abstract
The efficiency of the poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PC61BM) based organic solar cells was enhanced by using 1,2,4-trichlorobenzene (TCB) as a processing additive to control the blend morphology. The addition of TCB improved the arrangement of P3HT which resulted in good phase separated blend films. Correspondingly, the optimized solar cells showed a power conversion efficiency (PCE) of 4.17% with a fill factor (FF) of 0.69, which were higher than those of common thermal annealing devices (PCE 3.84%, FF 0.67). The efficiency was further improved to 4.74% by thermal annealing at 150 °C for 10 min with a higher FF of 0.74.
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The authors thank beamline BL14B1 (Shanghai Synchrotron Radiation Facility) for providing the beam time.
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This work was financially supported by the National Natural Science Foundation of China (Nos. 61405209 and 51573205).
Invited paper for special issue of “Opto-electronic Functional Polymer”
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Chen, Wc., Xiao, Mj., Yang, Cp. et al. Efficient P3HT:PC61BM solar cells employing 1,2,4-trichlorobenzene as the processing additives. Chin J Polym Sci 35, 302–308 (2017). https://doi.org/10.1007/s10118-017-1892-y
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DOI: https://doi.org/10.1007/s10118-017-1892-y