Improvement of photovoltaic performance by ternary blending of amorphous and semi-crystalline polymer analogues with PCBM

被引:48
作者
Kaestner, C. [1 ]
Rathgeber, S. [2 ]
Egbe, D. A. M. [3 ]
Hoppe, H. [1 ]
机构
[1] Ilmenau Univ Technol, Inst Phys, D-98693 Ilmenau, Germany
[2] Univ Koblenz Landau, Inst Nat Sci, D-56070 Koblenz, Germany
[3] Johannes Kepler Univ Linz, Linz Inst Organ Solar Cells, A-4040 Linz, Austria
关键词
HETEROJUNCTION SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; NANOSCALE MORPHOLOGY; CONJUGATED POLYMERS; CHARGE-TRANSPORT; AGGREGATION; P3HT/PCBM; DESIGN; CRYSTALLIZATION; FABRICATION;
D O I
10.1039/c3ta01070h
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ternary blending of amorphous and semi-crystalline anthracene-containing poly(p-phenyleneethynylene)-alt-poly(p-phenylene-vinylene) (PPE-PPV) copolymers (AnE-PVs) with PCBM was investigated in bulk heterojunction solar cells. In general, a strong impact on all photovoltaic parameters was observed by increasing the amount of amorphous AnE-PVba-derivative in relation to its semi-crystalline counterpart AnE-PVab. Interestingly, small additions of the amorphous copolymer were beneficial for overall solar cell performance. The observed performance increase of the ternary blend could be related to an improved open-circuit voltage, despite the fact that the binary blend of the amorphous copolymer and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) did not exhibit a larger photovoltage than the binary blend based on the semi-crystalline copolymer. These results indicate that a certain amorphous fraction of the donor polymer may be required for obtaining optimal bulk heterojunction morphologies, yielding maximum photovoltaic performance.
引用
收藏
页码:3961 / 3969
页数:9
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