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Nonfullerene Polymer Solar Cell with Large Active Area of 216 cm 2 and High Power Conversion Efficiency of 7.7%
Author(s) -
Huang Kuan-Min,
Lin Chih-Ming,
Chen Szu-Han,
Li Cheng-Sian,
Hu Chen-Hsuan,
Zhang Yu,
Meng Hsin-Fei,
Chang Chih-Yu,
Chao Yu-Chiang,
Zan Hsiao-Wen,
Huo Lijun,
Yu Peichen
Publication year - 2019
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201900071
Subject(s) - active layer , materials science , polymer solar cell , energy conversion efficiency , pedot:pss , acceptor , ternary operation , thiophene , polymer , layer (electronics) , crystallinity , chemical engineering , polymer chemistry , optoelectronics , organic chemistry , thin film transistor , chemistry , nanotechnology , composite material , physics , condensed matter physics , computer science , engineering , programming language
A polymer solar cell involving a nonfullerene acceptor is made by blade coating. In the ternary bulk‐heterojunction layer, the donor is poly[(2,6‐(4,8‐bis(5‐(2‐ethylhexyl)thiophen‐2‐yl)benzo[1,2‐b:4,5‐b’]dithiophene))‐co‐(1,3‐di(5‐thiophene‐2‐yl)‐ 5,7‐bis(2‐ethylhexyl)benzo[1,2‐c:4,5‐c’]dithiophene‐4,8‐dione)] (PBDB‐T) and the acceptor is a mixture of 3,9‐bis(2‐methylene‐(3‐(1,1‐dicyanomethylene)‐indanone))‐5,5,11,11‐tetrakis(4‐hexylphenyl)‐dithieno[2,3‐d:2’,3’‐d’]‐s‐indaceno[1,2‐b:5,6‐b’]dithiophene) (ITIC) and [6,6]‐phenyl C 71 ‐butyric acid methyl ester (PC 71 BM). The device structure is an indium tin oxide (ITO)‐coated glass substrate/PEDOT:PSS/ternary active layer/interfacial layer/Al. For a small active area of 0.04 cm 2 , the best power conversion efficiency is 9.8% with the LiF interfacial layer. For a large active area of 216 cm 2 , the best efficiency is 7.7% with the ZrOx interfacial layer. After annealing at 85 °C for 30 days, the large‐area device keeps 75% of the initial efficiency. The efficiency of 4.9% is achieved for a large‐area semi‐transparent device.