Efficiency performance of Ag-CdSe quantum dots nanocomposite sensitized solar cells

Abstract

An in-depth analysis of a solar cell with a photoanode made of glass/FTO/TiO2, and Ag- CdSe quantum dots (QD) nanocomposite, an electrolyte of iodide and triiodide, and a Pt electrode is presented in this work. We looked at how CdSe QD filling factors and Ag nanoparticles affect the solar cell's ability to absorb light. Additionally, the effects of nanocomposite layer thicknesses, Iodide/triiodide layer thicknesses, and TiO2 layer thicknesses on the absorption are investigated. It has been discovered that the Ag nanoparticles have an effect on the absorbance around 700 nm, dropping around 800 nm while keeping the range from 400 nm to 600 nm constant as the fraction of silver increases. With the switch to CdSe, the solar cell's performance was only marginally altered. When the composite thickness is increased to 200 nm, the value of A has the highest values and is expanded to include longer wavelengths. While altering the thickness of the iodide/triiodide layer (di) causes the highest values of A to expand at di = 200 nm. However, the performance of the solar cell is unaffected by the TiO2 layer's thickness (dt). As a result, we gave a solar cell the variables that impacted its performance.