Development of Large Band-Gap Conjugated Copolymers for Efficient Regular Single and Tandem Organic Solar Cells

被引:288
作者
Li, Kai [1 ]
Li, Zuojia [1 ]
Feng, Kui [1 ]
Xu, Xiaopeng [1 ]
Wang, Lingyan [1 ]
Peng, Qiang [1 ]
机构
[1] Sichuan Univ, Key Lab Green Chem & Technol, Minist Educ, Coll Chem, Chengdu 610064, Peoples R China
关键词
OPEN-CIRCUIT VOLTAGE; PHOTOVOLTAIC CELLS; HIGHLY EFFICIENT; SIDE-CHAINS; POLYMER; PERFORMANCE; RECOMBINATION; BENZOTHIADIAZOLE; ENHANCEMENT; DERIVATIVES;
D O I
10.1021/ja406220a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We demonstrated the synthesis and characterization of two conjugated copolymers, PBDTFBZO and PBDTFBZS, consisting of dialkylthiol substituted benzo[1,2-b:4,5-b']dithiophene donor and monofluorinated benzotriazole acceptor blocks. The resulting copolymers show large band gaps, deep HOMO and LUMO energy levels. Improved V-oc, J(sc), and FF were obtained at the same time to increase overall efficiencies of their single and tandem polymer solar cells. The enhanced V-oc can be ascribed to a low-lying HOMO energy level by incorporating dialkylthiol and fluorine substituents on the polymer backbone. The improvement in J(sc) and FF are likely due to high carrier mobility, suppressed charge recombination, and fine nanostructure morphology. A 7.74% PCE was achieved from the regular single device based on PBDTFBZS:PC71BM blend film with 3% 1,8-diiodooctane (DIO) additive. In combination with low band gap diketopyrrolopyrrole (DPP)-based copolymer, tandem devices based on PBDTFBZS exhibited high PCE up to 9.40%. The results indicate that PBDTFBZO and PBDTFBZS are promising polymer donor materials for future application of large-area polymer solar cells.
引用
收藏
页码:13549 / 13557
页数:9
相关论文
共 63 条
[31]   Dual Plasmonic Nanostructures for High Performance Inverted Organic Solar Cells [J].
Li, Xuanhua ;
Choy, Wallace C. H. ;
Huo, Lijun ;
Xie, Fengxian ;
Sha, Wei E. I. ;
Ding, Baofu ;
Guo, Xia ;
Li, Yongfang ;
Hou, Jianhui ;
You, Jingbi ;
Yang, Yang .
ADVANCED MATERIALS, 2012, 24 (22) :3046-3052
[32]   Electrochemical properties of luminescent polymers and polymer light-emitting electrochemical cells [J].
Li, YF ;
Cao, Y ;
Gao, J ;
Wang, DL ;
Yu, G ;
Heeger, AJ .
SYNTHETIC METALS, 1999, 99 (03) :243-248
[33]   For the Bright Future-Bulk Heterojunction Polymer Solar Cells with Power Conversion Efficiency of 7.4% [J].
Liang, Yongye ;
Xu, Zheng ;
Xia, Jiangbin ;
Tsai, Szu-Ting ;
Wu, Yue ;
Li, Gang ;
Ray, Claire ;
Yu, Luping .
ADVANCED MATERIALS, 2010, 22 (20) :E135-+
[34]   New alkylthienyl substituted benzo[1,2-b:4,5-b′] dithiophene-based polymers for high performance solar cells [J].
Liu, Bo ;
Chen, Xuewen ;
He, Yuehui ;
Li, Yongfang ;
Xu, Xinjun ;
Xiao, Lu ;
Li, Lidong ;
Zou, Yingping .
JOURNAL OF MATERIALS CHEMISTRY A, 2013, 1 (03) :570-577
[35]   Space-charge limited photocurrent [J].
Mihailetchi, VD ;
Wildeman, J ;
Blom, PWM .
PHYSICAL REVIEW LETTERS, 2005, 94 (12)
[36]   Conjugated Side-Chain-Isolated D-A Copolymers Based on Benzo[1,2-b:4,5-b′]dithiophene-alt-dithienylbenzotriazole: Synthesis and Photovoltaic Properties [J].
Min, Jie ;
Zhang, Zhi-Guo ;
Zhang, Siyuan ;
Li, Yongfang .
CHEMISTRY OF MATERIALS, 2012, 24 (16) :3247-3254
[37]   Bulk heterojunction solar cells with internal quantum efficiency approaching 100% [J].
Park, Sung Heum ;
Roy, Anshuman ;
Beaupre, Serge ;
Cho, Shinuk ;
Coates, Nelson ;
Moon, Ji Sun ;
Moses, Daniel ;
Leclerc, Mario ;
Lee, Kwanghee ;
Heeger, Alan J. .
NATURE PHOTONICS, 2009, 3 (05) :297-U5
[38]   Efficiency enhancement in low-bandgap polymer solar cells by processing with alkane dithiols [J].
Peet, J. ;
Kim, J. Y. ;
Coates, N. E. ;
Ma, W. L. ;
Moses, D. ;
Heeger, A. J. ;
Bazan, G. C. .
NATURE MATERIALS, 2007, 6 (07) :497-500
[39]   Donor-π-acceptor conjugated copolymers for photovoltaic applications:: Tuning the open-circuit voltage by adjusting the donor/acceptor ratio [J].
Peng, Qiang ;
Park, Kuyson ;
Lin, Tong ;
Durstock, Michael ;
Dai, Liming .
JOURNAL OF PHYSICAL CHEMISTRY B, 2008, 112 (10) :2801-2808
[40]   Enhanced solar cell performance by replacing benzodithiophene with naphthodithiophene in diketopyrrolopyrrole-based copolymers [J].
Peng, Qiang ;
Huang, Qin ;
Hou, Xiaobin ;
Chang, Pingpeng ;
Xu, Jun ;
Deng, Sijun .
CHEMICAL COMMUNICATIONS, 2012, 48 (93) :11452-11454