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A New Figure of Merit for Organic Solar Cells with Transport-limited Photocurrents

  • Compared to their inorganic counterparts, organic semiconductors suffer from relatively low charge carrier mobilities. Therefore, expressions derived for inorganic solar cells to correlate characteristic performance parameters to material properties are prone to fail when applied to organic devices. This is especially true for the classical Shockley-equation commonly used to describe current-voltage (JV)-curves, as it assumes a high electrical conductivity of the charge transporting material. Here, an analytical expression for the JV-curves of organic solar cells is derived based on a previously published analytical model. This expression, bearing a similar functional dependence as the Shockley-equation, delivers a new figure of merit α to express the balance between free charge recombination and extraction in low mobility photoactive materials. This figure of merit is shown to determine critical device parameters such as the apparent series resistance and the fill factor.

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Metadaten
Author details:Dieter NeherORCiDGND, Juliane Kniepert, Arik Elimelech, L. Jan Anton Koster
URN:urn:nbn:de:kobv:517-opus4-91414
Publication series (Volume number):Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (225)
Publication type:Postprint
Language:English
Publication year:2016
Publishing institution:Universität Potsdam
Release date:2016/06/09
Tag:Electronic and spintronic devices; Semiconductors
Number of pages:9
Funding institution:Universität Potsdam, Publikationsfonds
Funding number:PA 2016_16
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
DDC classification:0 Informatik, Informationswissenschaft, allgemeine Werke / 00 Informatik, Wissen, Systeme / 004 Datenverarbeitung; Informatik
Peer review:Referiert
Publishing method:Open Access
License (German):License LogoCC-BY - Namensnennung 4.0 International
External remark:Bibliographieeintrag der Originalveröffentlichung/Quelle
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