Modeling and simulation of energetically disordered organic solar cells

Abstract

The aim of this work is to present a consistent model for simulation of organic solar cells (OPV) with a correct description of mobility, density of state, organic-metal contacts, and exciton. We simulate the photoconversion by means of an integration of the optical and electrical part: light absorption is calculated with a Transfer Matrix Model and the charge transport is computed using Drift Diffusion approach including the effect of energetically disorder materials. Most model parameters are directly taken from experiment. The model is used to study the effect of energetic disordered materials and cell thickness on the performance of the cell in terms of short circuit current, open circuit voltage, and fill factor. Based on the results of this model, it will be possible to design and predict the optimal thickness of OPV toward higher efficiencies. (C) 2014 AIP Publishing LLC

Sensitivity of the Drift-Diffusion Approach in Estimating the Power Conversion Efficiency of Bulk Heterojunction Polymer Solar Cells

“…Here, we simplify the picture by stating the physical processes investigated in our modeling approach. A detailed description of the developed model can be found in [12].…”

Symmetry-Based Tight Binding Modeling of Halide Perovskite Semiconductors

“…31 Besides, stateof-the-art simulations of semiconductor devices, including atomistic effects at the TB level, have also been developed for both inorganic [32][33][34] and organic semiconductors. 35 For HOP, Kim and co-workers already proposed a local TB Hamiltonian, developed on an eight functions basis with spin-orbit coupling (SOC). 36 It was designed to model the Rashba effect close to the R-point of the perovskite reciprocal lattice and provides clear evidence of sizeable Rashba effect, thus confirming the initial DFT results addressing the importance of spatial and time reversal symmetries in this new family of semiconductors.…”

Effect of non-uniform absorption and unbalanced charge carrier mobilities on dynamic response of semitransparent organic photodetector

“…The transfer matrix method (TMM) is applied here to approximate the light absorption density. Since TMM vastly investigated for the optical simulation of organic thin film devices [18][19][20][21][22] , we carry out simply its basis here. Within this formalism the optical electric field resolved for the system and the energy dissipated locally ( Q ) at each point will determined.…”