Optimized multilayer indium-free electrodes for organic photovoltaics

Gentle, A. R., Yambem, S. D., Smith, G. B., Burn, P. L., & Meredith, P. (2015) Optimized multilayer indium-free electrodes for organic photovoltaics. Physica Status Solidi (A) Applications and Materials Science, 212(2), pp. 348-355.

View at publisher

Abstract

Flexible multilayer electrodes that combine high transparency, high conductivity, and efficient charge extraction have been deposited, characterised and used as the anode in organic solar cells. The anode consists of an AZO/Ag/AZO stack plus a very thin oxide interlayer whose ionization potential is fine-tuned by manipulating its gap state density to optimise charge transfer with the bulk heterojunction active layer consisting of poly(n-3- hexylthiophene-2,5-diyl) and phenyl-C61-butyric acid methyl ester (P3HT:BC61BM). The deposition method for the stack was compatible with the low temperatures required for polymer substrates. Optimisation of the electrode stack was achieved by modelling the optical and electrical properties of the device and a power conversion efficiency of 2.9% under AM1.5 illumination compared to 3.0% with an ITO-only anode and 3.5% for an ITO:PEDOT electrode. Dark I-V reverse bias characteristics indicate very low densities of occupied buffer states close to the HOMO level of the hole conductor, despite observed ionization potential being high enough. Their elimination should raise efficiency to that with ITO:PEDOT.

Impact and interest:

3 citations in Scopus
Search Google Scholar™
4 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: 86729
Item Type: Journal Article
Refereed: Yes
Keywords: Flexible electrodes, Indium tin oxide, Multilayer electrodes, Organic solar cells, Silver, ZnO, Butyric acid, Charge transfer, Electrodes, Heterojunctions, Indium, Ionization, Multilayers, Solar cells, Tin oxides, Organic solar cell, Ionization potential
DOI: 10.1002/pssa.201431469
ISSN: 18626300 (ISSN)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Deposited On: 20 Aug 2015 03:58
Last Modified: 21 Aug 2015 00:13

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page