Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/16365
Title: | Effect of light induced degradation on electrical transport and charge extraction in polythiophene:Fullerene (P3HT:PCBM) solar cells | Authors: | Khelifi, S. Voroshazi, E. SPOLTORE, Donato PIERSIMONI, Fortunato BERTHO, Sabine AERNOUTS, Tom MANCA, Jean Lauwaert, J. Vrielinck, H. Burgelman, M. |
Issue Date: | 2014 | Source: | SOLAR ENERGY MATERIALS AND SOLAR CELLS, 120, p. 244-252 | Abstract: | We investigate the photodegradation in inert atmosphere of (poly 3-hexylthiophene:[6,6]-phenyl-C61-butyric acid methyl ester) (P3HT:PCBM) heterojunction solar cells under continuous illumination using advanced electrical characterization and a device modeling tool. Our results indicate that different failure mechanisms contribute to the performance loss. The first 250 h of illumination induced p-type doping and recombination related to traps in the blend which mainly decreases the short-circuit current and the efficiency of the cells. Device modeling and simulation allowed us to prove that increased p-type doping of the blend provoke the loss in the short-circuit current and the quantum efficiency by simultaneous reduction of charge carrier mobility and the electric field together with a shrink of the space charge region. Transmission electron microscopy (TEM) measurements reveal a change in the blend morphology upon long illumination times manifested by phase segregation in the blend. The reduction in the open-circuit voltage is reported to be related to a slight reduction of the charge transfer energy (CT) upon 700 h of illumination aging. The final failure mechanism was a rapid drop in the fill factor which occurs upon 1000 h of illumination and manifested by the appearance of an S-shape J-V characteristic. This failure mechanism is linked to the reduction of charge extraction caused by a reduced surface recombination velocity at the contacts. (C) 2013 Elsevier B.V. All rights reserved. | Notes: | Khelifi, S (reprint author), Univ Ghent, Dept Elect & Informat Syst ELIS, Sint Pietersnieuwstr 41, B-9000 Ghent, Belgium, samira.khelifi@elis.ugent.be | Keywords: | Organic photovoltaics; P3HT:PCBM; Traps; Illumination aging; Characterization; Modeling | Document URI: | http://hdl.handle.net/1942/16365 | ISSN: | 0927-0248 | e-ISSN: | 1879-3398 | DOI: | 10.1016/j.solmat.2013.09.010 | ISI #: | 000329595400032 | Rights: | © 2013 Elsevier B.V. All rights reserved. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2015 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
khelifi 1.pdf Restricted Access | Published version | 1.64 MB | Adobe PDF | View/Open Request a copy |
SCOPUSTM
Citations
30
checked on Sep 7, 2020
WEB OF SCIENCETM
Citations
40
checked on Oct 13, 2024
Page view(s)
74
checked on Jul 14, 2022
Download(s)
44
checked on Jul 14, 2022
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.