S-shaped current-voltage characteristics of organic solar devices
By A. Wagenpfahl, D. Rauh, M. Binder, Carsten Deibel, V. Dyakonov. 2010
327 citations recorded by the source corpus.
Measuring the current-voltage characteristic of organic bulk heterojunction solar devices sometimes reveals an S-shaped deformation. We qualitatively produce this behavior by a numerical device simulation assuming a reduced surface recombination. Furthermore we show how to experimentally create these double diodes by applying an oxygen plasma etch on the indium-tin-oxide anode. Restricted charge transport over material interfaces accumulates space charges and therefore creates S-shaped deformations. Finally we discuss the consequences of our findings for the open-circuit voltage Voc.
Subfields: Electrical and Electronic Engineering, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/bfd21c858f19c8b73c8a94bacd5aa1c530edd256
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In Electrical and Electronic Engineering
In Polymers and Plastics
Citations in the corpus
- Polymer–fullerene bulk heterojunction solar cells (2010, background): “instance due to imbalanced electron and hole mobilities [162]. Another issue is the occurence of so-called double diodes, which corresponds to an inflexion point in the current–voltage characteristics [163, 164, 165]. The explanations for these s-shaped solar cell characteristics vary. For instance, ”