Multiple State Representation Scheme for Organic Bulk Heterojunction Solar Cells: A Novel Analysis Perspective

Abstract

The physics of organic bulk heterojunction solar cells is studied within a six state model, which is used to analyze the factors that affect current-voltage characteristics, power-voltage properties and efficiency, and their dependence on nonradiative losses, reorganization of the nuclear environment, and environmental polarization. Both environmental reorganization and polarity is explicitly taken into account by incorporating Marcus heterogeneous and homogeneous electron transfer rates. The environmental polarity is found to have a nonnegligible influence both on the stationary current and on the overall solar cell performance. For our organic bulk heterojunction solar cell operating under steady-state open circuit condition, we also find that the open circuit voltage logarithmically decreases with increasing nonradiative electron-hole recombination processes.

6 pages, 4 figures

References in corpus (9)

• Polymer-Fullerene Bulk Heterojunction Solar Cells
• Reaching optimal efficiencies using nano-sized photo-electric devices
• Relation of open circuit voltage to charge carrier density in organic bulk heterojunction solar cells
• Classical Driven Transport in Open Systems with Particle Interactions and General Couplings to Reservoirs
• One-dimensional transport of interacting particles: Currents, density profiles, phase diagrams and symmetries
• Time-Dependent Density Functional Theory for Driven Lattice Gas Systems with Interactions
• Nonlinear hopping transport in ring systems and open channels
• Unidirectional hopping transport of interacting particles on a finite chain
• Impact of nongeminate recombination on the performance of pristine and annealed P3HT:PCBM solar cells

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