A Numerical Simulation for Efficiency Enhancement of CZTS Based Thin Film Solar Cell Using SCAPS-1D

Abstract

In this paper we proposed a solar cell having model “Back Contact/CZTS/ZnCdS/ZnO/Front Contact”. CZTS is working as an absorber layer, ZnCdS as a buffer layer and ZnO as a window layer with back and front contacts. The Zn content was varied from 0% to 10% and bad gap was changed from 2.42 to 2.90 eV as described in the literature. The impact of this band gap variation has been observed on the performance of solar cell by using SCAPS-1D software. The efficiency was varied due to variation in bandgap of ZnCdS thin film layer. The simulation was carried out at 300K under A.M 1.5 G 1 Sun illumination. The energy bandgap diagram has been taken from SCAPS to explain the different parameters of solar cell. The effect of ZnCdS having different bandgap values was observed. Then the thickness of CZTS layer was varied to check its effect and hence at 3.0 um gave the imporved efficiency of 13.83% roundabout. After optimization of CZTS layer thickness, the effect of working temperature was examined on the performance of solar cell. The absorption coefficient variation from 1E+4 to 1E+9 cm-1 caused major effects on the characteristics parameters of solar cell along with on J-V characteristics and Quantum Efficiency curve. At 1E+9 cm-1 absorption coefficient the efficiency of solar cell boost up to 16.24%. This is the remarkable improvement in the efficiency of solar cell from 13.82% to 16.24%. After optimization of all parameters, simulation was run at 280K, having CZTS thickness of 3.5 um, with 10% content Zn in ZnCdS (2.90 eV), and absoption coefficient of 1E+9, the model efficiency reached up to 17.6% with Voc of 0.994 V, Jsc 26.1 mA/cm2 and Fill factor was 71.4%.

Design and Optimization of Electrical Parameters of Perovskites-based Thin Film Solar Cell

“…For the analysis of electrons and holes generations and recombination, as well as the drift and diffusion, the continuity equations can be utilized which is given by 2.20x10 18 2.80x10 19 1.00x10 18 8.00x10 17 2.22x10 18 2.00x10 20 1.80x10 19 N V (cm −3 )…”

“…Various physical properties of RbGeI 3 -based perovskites in a three-dimensional cubic structure with Pm − 3m space groups, along with other optoelectronic, thermodynamic, and mechanical properties, were explored in [17]. Different electronic properties and characteristics, notably their structure and magnetic properties, of cubic RbGeI 3 and RbDyO 3 perovskites were investigated in [18][19][20]. Optical analysis, first principles, structural, and electrical characteristics of RbGeI 3 PSCs were conducted by Jong et al The PBEsol functional was used to compute various parameters, including dielectric constants at static and high frequencies, and other mass calculations of electrons and holes, along with band gap length, lattice constant, and tolerance factor [21,22].…”

“…Spiro-OMeTAD fabrication demands less temperature like (195.15K) at the extremely difficult condition of reagent. Sublimation processes, which are quite expensive, are necessary to create highpurity spiro-OMeTAD [20,28]. In ambient temperature and pressure conditions and under normal illumination conditions organic-based charge transport materials (CTMs) become unstable [15,29].…”

Performance analysis of PVSyst based grid connected photovoltaic systems in Pakistan compared to SAARC countries

“…Using PVSyst software, this simulation's architecture employs a fixed inclined plane without varying the tilt angle over the course of the summer or winter [15][16][17][18]. Up to 2023, a variety of solar modules will be available, however each solar cell will have a varied efficiency owing to its open circuit voltage, cell efficiency, and short circuit current, all of which will affect the overall efficiency of the PV system [19]. Solar cells may be constructed using a number of software tools, including SCAPS-1D or LTSPICE-IV, and their I-V characteristic curves can be measured, resulting in a PV system with a higher efficiency [20,21].…”