Influence of charge carrier mobility on the performance of organic solar cells

By Carsten Deibel, A. Wagenpfahl, V. Dyakonov. 2008

152 citations recorded by the source corpus.

The power conversion efficiency of organic solar cells based on donor–acceptor blends is governed by an interplay of polaron pair dissociation and bimolecular polaron recombination. Both processes are strongly dependent on the charge carrier mobility, the dissociation increasing with faster charge transport, with raised recombination losses at the same time. Using a macroscopic effective medium simulation, we calculate the optimum charge carrier mobility for the highest power conversion efficiency, for the first time accounting for injection barriers and a reduced Langevin‐type recombination. An enhancement of the charge carrier mobility from 10–8 m2/V s for state of the art polymer–fullerene solar cells to about 10–6 m2/V s, which yields the maximum efficiency, corresponds to an improvement of only about 20% for the given parameter set. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Organic Chemistry

View Paper: https://www.semanticscholar.org/paper/8b2eba61707096ced9bfcf7499d6955d3b45e6d2

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In Electrical and Electronic Engineering

1. V. Dyakonov
2. Carsten Deibel
3. Andreas Baumann
4. Julia Schafferhans
5. A. Wagenpfahl

In Materials Chemistry

1. V. Dyakonov
2. Carsten Deibel

In Organic Chemistry

1. V. Dyakonov
2. Carsten Deibel

Citations in the corpus

• Polymer–fullerene bulk heterojunction solar cells (2010, unknown): “unrealistically considered to be infinite [78, 80, 168, 169].”
• Oxygen doping of P3HT:PCBM blends: Influence on trap states, charge carrier mobility and solar cell performance (2010, methodology): “In order to understand the influence of a decreased mobility as well as charge carrier doping on the solar cell parameters, we performed macroscopic simulations based on solving the differential equation system of the Poisson, the continuity and the drift–diffusion equations in one dimension [19, 20”
• Charge carrier mobility of the organic photovoltaic materials PTB7 and PC71BM and its influence on device performance (2015, background): “Drift–diffusion modeling has revealed optimum electron and hole mobilities of about 10 –10 cm/Vs with a relatively flat maximum [8–10].”