TY - JOUR
T1 - Morphology Regulation by Upside-Down Thermal Annealing Based on Blend Thick-Film Organic Solar Cells
AU - Zhang, Xiaohua
AU - Fan, Pu
AU - Wang, Zijun
AU - Zheng, Ding
AU - Yu, Junsheng
N1 - Funding Information:
This work was financially supported by the Foundation of National Natural Science Foundation of China (NSFC) (Grant Nos. 61421002, 61675041, and 51703019) and the Sichuan Science and Technology Program (Grant Nos. 2019YFG0121, 2019YJ0178, 2020YFG0279, and 2020YFG0281). This work is sponsored by the Sichuan Province Key Laboratory of Display Science and Technology.
Publisher Copyright:
©
PY - 2021/7/22
Y1 - 2021/7/22
N2 - The morphology property of the active layer which is determined by the post-treatment plays a critical role in optimizing the power conversion efficiency (PCE) of organic solar cells (OSCs). Here, we present a novel upside-down thermal annealing (DTA) method to regulate the morphology of PffBT4T-2OD:PC71BM (poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3′′′-di(2-octyldodecyl)-2,2′5′,2′′5′′,2′′′-quaterthiophen-5,5′′′-diyl)]:6,6-phenyl C71 butyric acid methyl ester) and further increase the PCE. Compared with regular thermal annealing treatment, a dramatic 15% enhancement in PCE to 10.4% was obtained after the DTA process, which is attributed to the more orderly packed π-πstacking of the PffBT4T-2OD network and the redistribution of the PC71BM molecules. Besides, the DTA method is beneficial for boosting the dissociation of excitons and transport of charge carriers. This ideal bulk-heterojunction (BHJ) morphology regulation by DTA based on thick-film OSCs is an effective way to achieve high-performance OSCs.
AB - The morphology property of the active layer which is determined by the post-treatment plays a critical role in optimizing the power conversion efficiency (PCE) of organic solar cells (OSCs). Here, we present a novel upside-down thermal annealing (DTA) method to regulate the morphology of PffBT4T-2OD:PC71BM (poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3′′′-di(2-octyldodecyl)-2,2′5′,2′′5′′,2′′′-quaterthiophen-5,5′′′-diyl)]:6,6-phenyl C71 butyric acid methyl ester) and further increase the PCE. Compared with regular thermal annealing treatment, a dramatic 15% enhancement in PCE to 10.4% was obtained after the DTA process, which is attributed to the more orderly packed π-πstacking of the PffBT4T-2OD network and the redistribution of the PC71BM molecules. Besides, the DTA method is beneficial for boosting the dissociation of excitons and transport of charge carriers. This ideal bulk-heterojunction (BHJ) morphology regulation by DTA based on thick-film OSCs is an effective way to achieve high-performance OSCs.
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U2 - 10.1021/acs.jpcc.1c03994
DO - 10.1021/acs.jpcc.1c03994
M3 - Article
AN - SCOPUS:85110494151
VL - 125
SP - 15194
EP - 15199
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 28
ER -