Toward Efficient Polymer Solar Cells Processed by a Solution-Processed Layer-By-Layer Approach

被引:69
作者
Cui, Yong [1 ,2 ]
Zhang, Shaoqing [3 ]
Liang, Ningning [1 ,2 ]
Kong, Jingyi [3 ]
Yang, Chenyi [3 ]
Yao, Huifeng [1 ]
Ma, Lijiao [1 ]
Hou, Jianhui [1 ,2 ]
机构
[1] Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, State Key Lab Polymer Phys & Chem,Beijing Natl La, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
[3] Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Beijing 100083, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
high performance; layer-by-layer; polymer solar cells; tunable interdiffusion; 25TH ANNIVERSARY ARTICLE; MORPHOLOGY; PERFORMANCE; AGGREGATION; MISCIBILITY; FABRICATION; ENABLES; OXIDE;
D O I
10.1002/adma.201802499
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The solution-processed layer-by-layer (LBL) method has potential to achieve high-performance polymer solar cells (PSCs) due to its advantage of enriching donors near the anode and acceptors near the cathode. However, power conversion efficiencies (PCEs) of the LBL-PSCs are still significantly lower than those of conventional one-step-processed PSCs (OS-PSCs). A method to solve the critical problems in LBL-PSCs is reported here. By employing a specific mixed solvent (o-dichlorobenzene [o-DCB]/tetrahydrofuran) to spin-coat the small-molecular acceptor IT-4F onto a layer of the newly designed polymer donor (PBDB-TFS1), appropriate interdiffusion between the PBDB-TFS1 and the IT-4F can critically be controlled, and then an ideal phase separation of the active layer and large donor/acceptor interface area can be realized with a certain amount of o-DCB. The PSCs based on the LBL method exhibit PCEs as high as 13.0%, higher than that of the counterpart (11.8%) made by the conventional OS solution method. This preliminary work reveals that the LBL method is a promising approach to the promotion of the photovoltaic performance of polymer solar cells.
引用
收藏
页数:7
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