Influence of octanedithiol on the nanomorphology of PCPDTBT:PCBM blends studied by solid-state NMR

被引：18

作者：

Chambon, Sylvain ^{[1
]}

Mens, Raoul ^{[1
]}

Vandewal, Koen ^{[1
]}

Clodic, Ewan ^{[2
]}

Scharber, Markus ^{[2
]}

Lutsen, Laurence ^{[3
]}

Gelan, Jan ^{[1
]}

Manca, Jean ^{[1
,3
]}

Vanderzande, Dirk ^{[1
,3
]}

Adriaensens, Peter ^{[1
]}

机构：

[1] Hasselt Univ, Inst Mat Res IMO Div Chem, B-3590 Diepenbeek, Belgium

[2] Konarka Austria, A-4040 Linz, Austria

[3] IMEC, Div IMOMEC, B-3590 Diepenbeek, Belgium

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2012年 / 96卷 / 01期

关键词：

NMR relaxation; Organic solar cells; PCPDTBT; Film morphology; ODT thiols; 3-DIMENSIONAL NANOSCALE ORGANIZATION; HETEROJUNCTION SOLAR-CELLS; PHASE-SEPARATION; THIN-FILMS; POLYMER; MORPHOLOGY; PERFORMANCE; EFFICIENCY; PCBM; MISCIBILITY;

D O I：

10.1016/j.solmat.2011.09.061

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The influence of octanedithiol (ODT) on the film morphology of PCPDTBT:PCBM (1:2) blends processed from solutions in chlorobenzene was studied by chemical shift selective carbon-13 solid-state NMR relaxation experiments. A close contact between PCBM and PCPDTBT is demonstrated for PCPDTBT:PCBM films processed with as well as without ODT, i.e. the dimensions of the substructures in the PCBM rich and polymer rich domains are smaller than 10 nm. The PCBM organization is shown to be reduced towards very small and weakly organized clusters. The main difference of processing the active film in the presence of ODT can be found in the ability of the polymer to improve its chain packing towards a state that closely resembles this of pure PCPDTBT. This difference in physical interaction between the polymer chains can explain the improved power conversion efficiency and the EQE red-shift of solar cells processed with ODT. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：210 / 217

页数：8

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