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

Ajuria, Jon, Chavhan, Sudam, Tena-Zaera, Ramon, Chen, Jihua, Rondinone, Adam J., Sonar, Prashant, Dodabalapur, Ananth , & Pacios, Roberto (2013) Nanomorphology influence on the light conversion mechanisms in highly efficient diketopyrrolopyrrole based organic solar cells. Organic Electronics, 14(1), pp. 326-334.

View at publisher

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.

Impact and interest:

15 citations in Scopus
Search Google Scholar™
15 citations in Web of Science®

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 75203
Item Type: Journal Article
Refereed: Yes
Keywords: Charge generation and transport, Diketopyrrolopyrrole, Inverted organic solar cells, Low bandgap, Nanomorphology, Charge generation, Diketopyrrolopyrroles, Nanomorphologies, Atomic force microscopy, Conversion efficiency, Fullerenes, Heterojunctions, Photovoltaic effects, Polymer films, Polymers, Transmission electron microscopy, Solar cells
DOI: 10.1016/j.orgel.2012.11.010
ISSN: 1566-1199
Divisions: Current > QUT Faculties and Divisions > Chancellery
Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Copyright Owner: Copyright 2012 Elsevier B.V.
Deposited On: 02 Oct 2014 22:50
Last Modified: 06 Oct 2014 21:47

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page