Molecular Orientation in Polymer Films for Organic Solar Cells Studied by NEXAFS

被引：44

作者：

Ayguel, Umut ^{[1
]}

Batchelor, David ^{[2
]}

Dettinger, Ulf ^{[1
]}

Yilmaz, Seyfullah ^{[3
]}

Allard, Sybille ^{[3
]}

Scherf, Ullrich ^{[3
]}

Peisert, Heiko ^{[1
]}

Chasse, Thomas ^{[1
]}

机构：

[1] Univ Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, Germany

[2] Karlsruher Inst Technol, Inst Synchrotron Strahlung, D-76021 Karlsruhe, Germany

[3] Berg Univ Wuppertal, Inst Polymertechnol, D-42119 Wuppertal, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 07期

关键词：

ABSORPTION FINE-STRUCTURE; INNER-SHELL EXCITATION; THIN-FILMS; SEMICONDUCTING POLYMER; CONJUGATED POLYMERS; CHARGE-TRANSPORT; PI-INTERACTION; HIGH-MOBILITY; BAND-GAP; POLY(3-HEXYLTHIOPHENE);

D O I：

10.1021/jp205653n

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：

The application of new polymer materials for organic solar cells requires a detailed understanding of the orientation and the electronic properties of the system because these have a dramatic effect on the device performance and efficiency. The films were prepared by doctor blade casting, a simple preparation route from solution. We study the orientation of the low band gap polymers poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene)-alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT) and poly-[2,6-(4,4-bis(2-ethyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene)-alt-5,8-(2,3-dioctylquinoxaline)] (PCPDTQ) as well as of the state of the art polymer poly(3-hexyl-thiophene) (P3HT) using near-edge X-ray absorption fine structure spectroscopy (NEXAFS). Clear angular dependence in the NEXAFS spectra is observed for P3HT and PCPDTBT pointing to well-orientated films.

引用

页码：4870 / 4874

页数：5

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