Numerical modeling and simulation for augmenting the photovoltaic response of HTL free perovskite solar cells

Organo-metal halide perovskites have drawn a lot of appeal from the research community in recent years because of its application as an absorber in thin-film solar cells. However, the fabrication of multi-layered defect-free planar perovskite solar cell (PSC) structures is a very challenging task. This is because the interface between charge transport layer/perovskite materials promotes hysteresis and recombination leading to poor long term stability. Along with the mechanism of charge transport, the dependence of performance on the material parameters in hole transport layer (HTL)-free PSCs is unclear. Removal of the HTL layer from the standard configuration in PSC degrades the device performance. In this paper, a novel HTL-free PSC employing glass/FTO/TiO2/CH3NH3Pb(I1-xBrx)3/Au contact structure has been investigated using a one-dimensional modeling program AMPS-1D. It was demonstrated that to achieve better photovoltaic performance, the thickness of the absorber should be increased; the acceptor doping concentration should be of the order of ti 1017 and the bandgap should be modified to 1.7 eV. Under moderate simulation conditions, if the above factors are satisfied, efficiencies over 17% can be attained. (c) 2019 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of the scientific committee of the Third International Conference on Materials Science (ICMS2020).