Nanomorphology influence on the light conversion mechanisms in highly efficient diketopyrrolopyrrole based organic solar cells

被引：21

作者：

Ajuria, Jon ^{[1
]}

Chavhan, Sudam ^{[2
]}

Tena-Zaera, Ramon ^{[2
]}

Chen, Jihua ^{[3
]}

Rondinone, Adam J. ^{[3
]}

Sonar, Prashant ^{[4
,5
]}

Dodabalapur, Ananth ^{[4
,5
,6
]}

Pacios, Roberto ^{[1
]}

机构：

[1] IK4 IKERLAN, Dept Microsyst, E-20500 Arrasate Mondragon, Spain

[2] IK4 CIDETEC, Dept Energy, E-20009 Donostia San Sebastian, Spain

[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[4] Inst Mat Res & Engn, Singapore 117602, Singapore

[5] ASTAR, Singapore 117602, Singapore

[6] Univ Texas Austin, Microelect Res Ctr, Austin, TX 78758 USA

来源：

ORGANIC ELECTRONICS | 2013年 / 14卷 / 01期

关键词：

Low bandgap; Diketopyrrolopyrrole; Inverted organic solar cells; Nanomorphology; Charge generation and transport; POLYMER; PERFORMANCE; MORPHOLOGY; HOLE; TRANSISTORS; DEPENDENCE; ELECTRON;

D O I：

10.1016/j.orgel.2012.11.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, diketopyrrolopyrrole-based polymer bulk heterojunction solar cells with inverted and regular architecture have been investigated. The influence of the polymer: fullerene ratio on the photoactive film nanomorphology has been studied in detail. Transmission Electron Microscopy and Atomic Force Microscopy reveal that the resulting film morphology strongly depends on the fullerene ratio. This fact determines the photocurrent generation and governs the transport of free charge carriers. Slight variations on the PCBM ratio respect to the polymer show great differences on the electrical behavior of the solar cell. Once the polymer: fullerene ratio is accurately adjusted, power conversion efficiencies of 4.7% and 4.9% are obtained for inverted and regular architectures respectively. Furthermore, by correlating the optical and morphological characterization of the polymer: fullerene films and the electrical behavior of solar cells, an ad hoc interpretation is proposed to explain the photovoltaic performance as a function of this polymer: blend composition. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：326 / 334

页数：9

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