TY - JOUR
T1 - Precisely control the morphology and crystallization of temperature-dependent aggregation bulk heterojunction by using co-solvent system for optimized light intensity distribution and its effect on thick active layer polymer solar cells
AU - Zhang, Xiaohua
AU - Zheng, Ding
AU - Xing, Shen
AU - Wang, Hanyu
AU - Huang, Jiang
AU - Yu, Junsheng
N1 - Funding Information:
This research was funded by the Foundation for Innovation Research Groups of the National Natural Science Foundation of China (NSFC) (Grant No. 61421002), the NSFC (Grant No. 61675041), and the Project of Science and Technology of Sichuan Province (Grant Nos. 2016HH0027 and 2016ZC1243). Dr. Huang also is thankful for the financial support of the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2010Z004).
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017
Y1 - 2017
N2 - The effects of co-solvent on the morphology, crystallization and light intensity distribution of thick bulk heterojunction (BHJ) polymer solar cells (PSCs) based on polymer of [(5, 6-difluoro-2, 1, 3-benzothiadiazol-4, 7-diyl)-alt-(3, 3000-di(2-octyldodecyl)-2, 20, 50, 200, 500, 2000-quaterthiophen-5, 5000-diyl)](PffBT4T-2OD):[6, 6]-phenyl-C71-butyric acid methyl ester (PC71BM) are studied. By adjusting different co-solvent systems in thick BHJ layer, it is found that the polymer crystallization, fullerene absorption and PffBT4T-2OD:PC71BM BHJ morphology are optimized by using a co-solvent of chlorobenzene (CB):dichlorobenzene (DCB):1, 8-diiodooctanein (DIO). The optimized BHJ thickness of 250 nm is analyzed by using transfer matrix theory, resulting in enhanced FF and PCE of 66.7% and 9.16%, respectively. This phenomenon is due to the active layer can absorb 90% of the incident light with a thickness of 250 nm, which contributes to the light intensity distribution and exciton generation rate.
AB - The effects of co-solvent on the morphology, crystallization and light intensity distribution of thick bulk heterojunction (BHJ) polymer solar cells (PSCs) based on polymer of [(5, 6-difluoro-2, 1, 3-benzothiadiazol-4, 7-diyl)-alt-(3, 3000-di(2-octyldodecyl)-2, 20, 50, 200, 500, 2000-quaterthiophen-5, 5000-diyl)](PffBT4T-2OD):[6, 6]-phenyl-C71-butyric acid methyl ester (PC71BM) are studied. By adjusting different co-solvent systems in thick BHJ layer, it is found that the polymer crystallization, fullerene absorption and PffBT4T-2OD:PC71BM BHJ morphology are optimized by using a co-solvent of chlorobenzene (CB):dichlorobenzene (DCB):1, 8-diiodooctanein (DIO). The optimized BHJ thickness of 250 nm is analyzed by using transfer matrix theory, resulting in enhanced FF and PCE of 66.7% and 9.16%, respectively. This phenomenon is due to the active layer can absorb 90% of the incident light with a thickness of 250 nm, which contributes to the light intensity distribution and exciton generation rate.
KW - Co-solvent
KW - Morphological crystalline control
KW - Optical simulation
KW - Thick BHJ polymer solar cells
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U2 - 10.1016/j.solener.2017.03.034
DO - 10.1016/j.solener.2017.03.034
M3 - Article
AN - SCOPUS:85015744181
SN - 0038-092X
VL - 147
SP - 106
EP - 112
JO - Solar Energy
JF - Solar Energy
ER -
