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

Jon Ajuria; Sudam Chavhan; Ramón Tena-Zaera; Jihua Chen; Adam J. Rondinone; Prashant Sonar; Ananth Dodabalapur; Roberto Pacios

doi:10.1016/j.orgel.2012.11.010

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

Jon Ajuria, Sudam Chavhan, Ramón Tena-Zaera, Jihua Chen, Adam J. Rondinone, Prashant Sonar, Ananth Dodabalapur, Roberto Pacios

Macromolecular Nanomaterials

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	326-334
Number of pages	9
Journal	Organic Electronics
Volume	14
Issue number	1
DOIs	https://doi.org/10.1016/j.orgel.2012.11.010
State	Published - Jan 2013

Funding

JA and RP thank the European Community’s Seventh Framework Programme (FP7/2007-2013) under Grant No. 287818 of the X10D project for partial financial support of this work. R. T-Z. acknowledges the support from the “Ramón y Cajal” Program of the Spanish MICINN. Partial financial support from Ministerio de Educación y Ciencia under the project HOPE CSD2007-00007 (Consolider-Ingenio 2010) is acknowledged. PS and Prof. AD acknowledge the Visiting Investigatorship Programme (VIP) of the Agency for Science, Technology and Research (A * STAR), Republic of Singapore for financial support. Transmission electron micrographs (TEM) images of the blend film were conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Division of Scientific User Facilities, Office of Basic Energy Sciences, US Department of Energy.

Keywords

Charge generation and transport
Diketopyrrolopyrrole
Inverted organic solar cells
Low bandgap
Nanomorphology

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title = "Nanomorphology influence on the light conversion mechanisms in highly efficient diketopyrrolopyrrole based organic solar cells",

abstract = "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.",

keywords = "Charge generation and transport, Diketopyrrolopyrrole, Inverted organic solar cells, Low bandgap, Nanomorphology",

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year = "2013",

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doi = "10.1016/j.orgel.2012.11.010",

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AU - Rondinone, Adam J.

AU - Sonar, Prashant

AU - Dodabalapur, Ananth

AU - Pacios, Roberto

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

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