太陽電池応用に向けた半導体ナノ構造体配列の形成と評価に関する研究

関西大

STUDIES ON SYNTHESES AND ANALYSIS OF SEMICONDUCTOR NANOSTRUCTURE ARRAYS FOR PHOTOVOLTAIC APPLICATION [論文要旨及び審査の要旨]

関西大

Modeling of a New Solar Cell Model with ZnO/CdS Core-Shell Nanowire Arrays Embedded in a CZTS Absorber

Copper-zinc-tin-sulfide (CZTS) solar cells are increasingly attracting researchers due to their low cost, non-radioactive behavior, and environmental friendliness. A SCAPS simulation study of these solar cells with zinc oxide (ZnO)/cadmium sulfide (CdS) core-shell nanowires and different thicknesses of absorber, buffer, and window is described in this study. The study resulted in an optimized model with a CZTS absorber, a CdS buffer, and a ZnO window with respective thicknesses of 830 nm, 90 nm, and 140 nm, efficiency (EFF) of 16.62%, a factor of fill (FF) of 81.75%, open circuit voltage (Voc) of 0.61 V and short circuit current density (Jsc) of 6.3 cmA/cm2. These results are very close to those reported in the literature. Keywords: CZTS; Efficiency; shell thickness; ZnO/CdS core-shell nanowires; SCAPS. DOI: 10.7176/JETP/13-1-01 Publication date: January 31st 202

Optimization of the Diameter of CdS Nanowires Embedded in a CZTS Buffer Layer under Different Solar Incidence Angles

Copper-zinc-tin-sulfide (CZTS) solar cells hold great promise in the production of solar energy. A COMSOL Multiphysics simulation study of solar cells with cadmium sulfide (CdS) nanowires at different light angles is described in this study. The optimum diameter of CdS nanowires is 40 nm with a maximum absorption efficiency of 16.6%, a short circuit current density of 6.69 mA/cm2, an open circuit voltage of 0.69 V, is obtained at an angle of incidence of light of 0°. Keywords: CZTS; CdS Nanowires; Absorption; Efficiency; Short-circuit current density; Open circuit voltage. DOI: 10.7176/JETP/14-2-03 Publication date: February 28th 2024

Simulation of a New CZTS Solar Cell Model with ZnO/CdS Core-Shell Nanowires for High Efficiency

The numerical modeling of Cu2ZnSnS4 solar cells with ZnO/CdS core-shell nanowires of optimal dimensions with and without graphene is described in detail in this study. The COMSOL Simulation was used to determine the optimal values of core diameter and shell thickness by comparing their optical performance and to evaluate the optical and electrical properties of the different models. The deposition of a nanolayer of graphene on the layer of MoS2 made it possible to obtain a maximum absorption of 97.8% against 96.5% without the deposition of graphene.The difference between generation rates and between recombination rates of electron–hole pairs of models with and without graphene is explored.The electrical parameters obtained, such as the filling factor (FF), the short-circuit current density (Jsc), the open-circuit voltage (Voc), and the efficiency (EFF) are, respectively, 81.7%, 6.2 mA/cm2, 0.63 V, and 16.6% in the presence of graphene against 79.2%, 6.1 mA/cm2, 0.6 V, and 15.07% in the absence of graphene. The suggested results will be useful for future research work in the field of CZTS-based solar cells with ZnO/CdS core-shell nanowires with broadband light absorption rates

Simulation of a New CZTS Solar Cell Model with ZnO/CdS Core-Shell Nanowires for High Efficiency

The numerical modeling of Cu2ZnSnS4 solar cells with ZnO/CdS core-shell nanowires of optimal dimensions with and without graphene is described in detail in this study. The COMSOL Simulation was used to determine the optimal values of core diameter and shell thickness by comparing their optical performance and to evaluate the optical and electrical properties of the different models. The deposition of a nanolayer of graphene on the layer of MoS2 made it possible to obtain a maximum absorption of 97.8% against 96.5% without the deposition of graphene.The difference between generation rates and between recombination rates of electron–hole pairs of models with and without graphene is explored.The electrical parameters obtained, such as the filling factor (FF), the short-circuit current density (Jsc), the open-circuit voltage (Voc), and the efficiency (EFF) are, respectively, 81.7%, 6.2 mA/cm2, 0.63 V, and 16.6% in the presence of graphene against 79.2%, 6.1 mA/cm2, 0.6 V, and 15.07% in the absence of graphene. The suggested results will be useful for future research work in the field of CZTS-based solar cells with ZnO/CdS core-shell nanowires with broadband light absorption rates