TY - JOUR
T1 - Effects of different polar solvents for solvent vapor annealing treatment on the performance of polymer solar cells
AU - Zheng, Yifan
AU - Li, Shuguang
AU - Zheng, Ding
AU - Yu, Junsheng
N1 - Funding Information:
This work was supported by the National Science Foundation of China (NSFC) (Grant No. 61177032 ), the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2010Z004 ), Chongqing Science & Technology Commission ( cstc2013jcyjys50001 ).
PY - 2014/11
Y1 - 2014/11
N2 - The effects of different polar solvents on the performance of solvent vapor annealing treated polymer solar cell (PSC) with a structure of ITO/ZnO/PTB7: PC71BM/MoO3/Ag was systematically investigated by applying different polar solvents, including methanol, ethanol, dimethylsulfoxide, acetone and isopropanol. By analyzing the variation of PSC performance and the morphology of active layer, we found that both the solubility parameters (Δ) and viscosity of solvent were playing an important role in controlling the morphology of PTB7: PC71BM blend. Especially, the PSC treated by methanol with high Δ and low viscosity exhibited a remarkable enhancement of power conversion efficiency from 6.55% to 8.13%. The performance improvement was mainly due to the formation of the nanoscale crystallization of PTB7: PC71BM blend and the moderated aggregation of PC71BM, resulting in efficient charge separation, balanced charge transport and suppressed charge recombination.
AB - The effects of different polar solvents on the performance of solvent vapor annealing treated polymer solar cell (PSC) with a structure of ITO/ZnO/PTB7: PC71BM/MoO3/Ag was systematically investigated by applying different polar solvents, including methanol, ethanol, dimethylsulfoxide, acetone and isopropanol. By analyzing the variation of PSC performance and the morphology of active layer, we found that both the solubility parameters (Δ) and viscosity of solvent were playing an important role in controlling the morphology of PTB7: PC71BM blend. Especially, the PSC treated by methanol with high Δ and low viscosity exhibited a remarkable enhancement of power conversion efficiency from 6.55% to 8.13%. The performance improvement was mainly due to the formation of the nanoscale crystallization of PTB7: PC71BM blend and the moderated aggregation of PC71BM, resulting in efficient charge separation, balanced charge transport and suppressed charge recombination.
KW - Polar solvent
KW - Polymer solar cell (PSC)
KW - Solvent polarity
KW - Solvent property
KW - Solvent vapor annealing (SVA)
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U2 - 10.1016/j.orgel.2014.07.026
DO - 10.1016/j.orgel.2014.07.026
M3 - Article
AN - SCOPUS:84906492457
VL - 15
SP - 2647
EP - 2653
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
SN - 1566-1199
IS - 11
ER -