Influence of the polymer architecture on morphology and device properties of polymer bulk heterojunction photovoltaic cells

M.M. Koetse, J. Sweelssen, T. Franse, S.C. Veenstra, J.M. Kroon, X.N. Yang, A.A. Alexeev, J. Loos, U.S. Schubert, H.F.M. Schoo

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

7 Citations (Scopus)

Abstract

Polymer bulk hetero junction solar cells were made from poly(2-methoxy-5-(3,7-dimethyloctyloxy)-1,4-phenylene-vinylene) (MDMO-PPV) as donor and poly(cyanoetherphenylenevinylene) (PCNEPV) derivatives as acceptor material. In this paper we start out with discussing the synthesis of the materials. Subsequently, the main issues concerning the devices are treated. Annealing the devices yielded devices with encouraging efficiencies of 0.5% (1 sun, 100mW/cm2), as calculated from the maximum power points (MPP). AFM studies revealed that this anneal step improves especially the interface of the active layer with the under laying PEDOT:PSS, although mobility and morphology changes can not be ruled out. Lowering the molecular weight (Mw) of the MDMO-PPV gave a slight improvement of the device performance. Decreasing the Mw of the acceptor material, MDMO-PCNEPV (PCNEPV derivative with the same side chains as MDMO-PPV) and optimizing the layer thickness led to a device with an efficiency of 0.65%. Finally we looked into the influence of the nature of the side chains on the acceptor polymer. The results suggest that the closer the resemblance between donor and acceptor is the better the device performance.
Original languageEnglish
Title of host publicationProceedings of the International Society for Optical Engineering (SPIE): Organic Photovoltaics IV, 7-8 August 2003, San Diego, California, USA
EditorsZ.H. Kafafi, P.A. Lane
Place of PublicationBellingham, Wash.
PublisherSPIE
Pages119-128
ISBN (Print)0-8194-5088-X
DOIs
Publication statusPublished - 2004
Eventconference; Organic photovoltaics IV : 7 - 8 August 2003, San Diego, California, USA -
Duration: 1 Jan 2004 → …

Publication series

NameProceedings of SPIE
Volume5215
ISSN (Print)0277-786X

Conference

Conferenceconference; Organic photovoltaics IV : 7 - 8 August 2003, San Diego, California, USA
Period1/01/04 → …
OtherOrganic photovoltaics IV : 7 - 8 August 2003, San Diego, California, USA

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