Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

Examining charge transport networks in organic bulk heterojunction photovoltaic diodes using 1/f noise spectroscopy.

Kaku, K. and Williams, A.T. and Mendis, B.G. and Groves, C. (2015) 'Examining charge transport networks in organic bulk heterojunction photovoltaic diodes using 1/f noise spectroscopy.', Journal of materials chemistry C., 3 (23). pp. 6077-6085.

Abstract

In this article we present 1/f noise spectroscopy measurements relating to charge transport networks in poly(3-hexylthiophene) (P3HT):phenyl-C61-butyric acid methyl ester (PCBM) space-charge limited diode (SCLD) and organic photovoltaic (OPV) devices. The P3HT:PCBM active layer was varied to give a range of compositions and heterogeneities. The noise data obtained suggest that un-annealed P3HT:PCBM OPVs are limited by poor hole transport through the mixed phase, and that annealing promotes a more heterogeneous network, resulting in efficient charge transport through an increased population of P3HT crystallites, and better OPV performance. These findings are in agreement with literature studies for similar devices using other measurement techniques, demonstrating that 1/f noise is sensitive to the nature of the charge transport network in bipolar devices. Previous data only confirmed the sensitivity of 1/f noise spectroscopy to the charge transport network in unipolar devices, hence the current data suggest the technique can be used more generally to investigate charge transport networks in bulk heterojunction organic electronic devices such as OPVs and organic light-emitting diodes.

Item Type:Article
Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution.
Download PDF (Final published version)
(2566Kb)
Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution.
Download PDF (Advance online version)
(2561Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1039/C5TC00348B
Publisher statement:This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Date accepted:11 May 2015
Date deposited:26 May 2015
Date of first online publication:June 2015
Date first made open access:No date available

Save or Share this output

Export:
Export
Look up in GoogleScholar