Oxygen doping of P3HT:PCBM blends: Influence on trap states, charge carrier mobility and solar cell performance

Abstract

We investigated the influence of oxygen on the performance of P3HT:PCBM (poly(3-hexylthiophene):[6,6]-phenyl C61 butyric acid methyl ester) solar cells by current--voltage, thermally stimulated current (TSC) and charge extraction by linearly increasing voltage (CELIV) measurement techniques. The exposure to oxygen leads to an enhanced charge carrier concentration and a decreased charge carrier mobility. Further, an enhanced formation of deeper traps was observed, although the overall density of traps was found to be unaffected upon oxygen exposure. With the aid of macroscopic simulations, based on solving the differential equation system of Poisson, continuity and drift-diffusion equations in one dimension, we demonstrate the influence of a reduced charge carrier mobility and an increased charge carrier density on the main solar cell parameters, consistent with experimental findings.

References in corpus (4)

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• Origin of Reduced Polaron Recombination in Organic Semiconductor Devices
• Influence of Charge Carrier Mobility on the Performance of Organic Solar Cells
• Trap Distribution and the Impact of Oxygen-induced Traps on the Charge Transport in Poly(3-Hexylthiophene)

Cited by in corpus (16)

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• Reversible and Irreversible Interactions of Poly(3-hexylthiophene) with Oxygen Studied by Spin-Sensitive Methods
• Nongeminate recombination in neat P3HT and P3HT:PCBM blend films
• Electronic Trap States in Methanofullerenes
• Watching Space Charge Build up in an Organic Solar Cell
• Impact of a doping-induced space-charge region on the collection of photo-generated charge carriers in thin-film solar cells based on low-mobility semiconductors
• Visualising the Vertical Energetic Landscape in Organic Photovoltaics
• Investigation of electronic trap states in organic photovoltaic materials by current-based deep level transient spectroscopy
• Transport resistance dominates the fill factor losses in record organic solar cells
• Order of Decay of Mobile Charge Carriers in P3HT:PCBM Solar Cells
• Temperature dependent charge transfer state absorption and emission reveal dominant role of dynamic disorder in organic solar cells
• Influence of Environmentally Affected Hole Transport Layers on Spatial Homogeneity and Charge Transport Dynamics of Organic Solar Cells
• Impact of Unintentional Oxygen Doping on Organic Photodetectors
• Charge Transfer in Ternary Solar Cells Employing Two Fullerene Derivatives: Where do Electrons Go?
• Short-Term Environmental Effects and Their Influence on Spatial Homogeneity of Organic Solar Cell Functionality