Nanoparticle concentration profile in polymer-based solar cells

被引：159

作者：

Kiel, Jonathan W. ^{[1
,2
]}

Kirby, Brian J. ^{[3
]}

Majkrzak, Charles F. ^{[3
]}

Maranville, Brian B. ^{[3
]}

Mackay, Michael E. ^{[1
]}

机构：

[1] Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA

[2] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA

[3] Natl Inst Stand & Technol, Ctr Neutron Scattering, Gaithersburg, MD 20899 USA

来源：

SOFT MATTER | 2010年 / 6卷 / 03期

基金：

美国国家科学基金会;

关键词：

FULLERENE DERIVATIVES; ELECTRON-MICROSCOPY; EXCITON DIFFUSION; PHASE; MORPHOLOGY; POLY(3-HEXYLTHIOPHENE); SOLUBILITY; ORGANIZATION; BLENDS;

D O I：

10.1039/b920979d

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：

Polymer-based solar cell performance is dictated by nanoscale structures since the active layer suffers from extremely short exciton diffusion lengths. To understand the structures' effect on cell performance we use neutron reflectivity to investigate the thin film morphology containing a 1 : 1 by weight blend of [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) nanoparticles and poly(3-hexylthiophene) (P3HT). Neutron reflectivity is uniquely suited to this system due to the large scattering length density contrast between the two components, other techniques do not have this contrast. Here we find a higher PCBM concentration at the substrate and near, but not at, the air interface. Annealing the active layer shows a qualitatively similar profile with slightly different interfacial concentrations. Regardless, it is clear the resulting morphology is not optimal for device performance as we show for working solar cells.

引用

页码：641 / 646

页数：6

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