Numerical Simulation of Cs2AgBiBr6-based Perovskite Solar Cell with ZnO Nanorod and P3HT as the Charge Transport Layers

TL;DR

This study uses simulations to optimize a lead-free, environmentally friendly Cs2AgBiBr6-based perovskite solar cell with ZnO nanorods and P3HT, achieving a maximum efficiency of 4.48% and providing design insights.

Contribution

It introduces a detailed simulation analysis of a non-toxic perovskite solar cell with specific charge transport layers, highlighting optimal parameters for improved performance.

Findings

Maximum efficiency of 4.48% at 600 nm absorber thickness

Optimal electron affinities for P3HT and ZnO nanorod are 3.3 eV and 4.6 eV

Back contact work function of 5.2 eV and defect density of 1E15 cm-3 are optimal

Abstract

We carried out simulative investigations on a non-toxic, lead-free perovskite solar cell (PSC), where Cs2AgBiBr6, P3HT, ZnO nanorod, and C were utilized as the absorber layer, hole transport layer, electron transport layer, and back contact, respectively. At 600 nm optimum absorber thickness, the device achieved a maximum power conversion efficiency of 4.48%. The PSC operated optimally when the electron affinities were set at 3.3 eV and 4.6 eV for P3HT and ZnO nanorod, respectively. Moreover, the hole mobility and acceptor concentration of P3HT should be weighed during the choosing of appropriate doping additives and doping levels. Besides, the optimum back contact work function and absorber defect density were found to be 5.2 eV and 1E15 cm-3, respectively. We also observed the effect of radiative recombination rates and different charge transport layers on the device's performance. Overall, this study's simulation results will provide insightful guidance towards fabricating an environmentally benign PSC.