Efficient inverted polymer solar cells employing favourable molecular orientation

被引：784

作者：

Vohra, Varun ^{[1
]}

Kawashima, Kazuaki ^{[2
,3
]}

Kakara, Takeshi ^{[3
]}

Koganezawa, Tomoyuki ^{[4
]}

Osaka, Itaru ^{[2
,5
]}

Takimiya, Kazuo ^{[2
]}

Murata, Hideyuki ^{[1
]}

机构：

[1] JAIST, Sch Mat Sci, Nomi, Ishikawa 9231292, Japan

[2] RIKEN, CEMS, Emergent Mol Funct Res Grp, Wako, Saitama 3510198, Japan

[3] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Hiroshima 7398527, Japan

[4] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

[5] Japan Sci & Technol Agcy, Precursory Res Embryon Sci & Technol, Chiyoda Ku, Tokyo 1020075, Japan

来源：

NATURE PHOTONICS | 2015年 / 9卷 / 06期

基金：

日本科学技术振兴机构;

关键词：

POWER CONVERSION EFFICIENCY; LOW-BANDGAP POLYMER; FILL FACTORS; PERFORMANCE; COPOLYMERS; MORPHOLOGY; DESIGN; HETEROJUNCTIONS; TRANSISTOR;

D O I：

10.1038/NPHOTON.2015.84

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Improving the power conversion efficiency of polymer-based bulk-heterojunction solar cells is a critical issue. Here, we show that high efficiencies of similar to 10% can be obtained using the crystalline polymer PNTz4T in single-junction inverted cells with a thick active layer having a thickness of similar to 300 nm. The improved performance is probably due to the large population of polymer crystallites with a face-on orientation and the 'favourable' distribution of edge-on and face-on crystallites along the film thickness (revealed by in-depth studies of the blend films using grazing-incidence wide-angle X-ray diffraction), which results in a reduction in charge recombination and efficient charge transport. These results underscore the great promise of polymer solar cells and raise the hope of achieving even higher efficiencies by means of materials development and control of molecular ordering.

引用

页码：403 / +

页数：7

共 40 条

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