Journal Article

FZJ-2020-03007

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Understanding the Light‐Intensity Dependence of the Short‐Circuit Current of Organic Solar Cells

Hartnagel, P.FZJ* ; Kirchartz, T. (Corresponding author)FZJ*

2020
Wiley-VCH Verlag Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/25830  doi:10.1002/adts.202000116

Abstract: In organic solar cells, bimolecular recombination is a key factor limiting the device performance and creating the need for characterization. Light‐intensity‐dependent short‐circuit current density measurements are a frequently used tool to qualitatively analyze bimolecular recombination in a device. When applying a 0D model, bimolecular recombination is expected to reduce the otherwise linear correlation of the short‐circuit current density Jsc and the light intensity Φ to a sublinear trend. It is shown by numerical simulations that the slope of the Jsc–Φ curve is affected by the recombination mechanism (direct or via traps), the spatial distribution of charge carriers and—in thick solar cells—by space charge effects. Only the combination of these effects allows proper explanation of the different cases, some of which cannot be explained in a simple 0D device model.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 121 - Solar cells of the next generation (POF3-121) (POF3-121)

Appears in the scientific report 2020

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Database coverage:
; ; Clarivate Analytics Master Journal List ; DEAL Wiley ; Emerging Sources Citation Index ; Web of Science Core Collection

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