Improvement The Efficiency Of Thin Film CIGS Solar Cells By Changing The ZnO Layers using Silvaco Software

Abstract

In this study the function of solar cells with the structure of CuIn1-xGaxSe2 is examined. CIGS solar cell consists of layers of ZnO (Layer TCO), Cd_S (buffer layer), CIGS (absorbent layer), and Layer MO (substrate), which Cd_S and CIGS layers form a PN Junction. Later using SILVACO software CIGS solar cell is simulated. Then, CIGS solar cell is simulated using Silvaco software. Later by changing the ZnO layer thickness, its effect on cell function is discussed and examined. Important parameters of a solar cell that will be discussed here, include open circuit voltage (VOC), short circuit current (ISC), maximum power (Pmax), filling factor (FF) and efficiency (η). After it was that conducted simulations, ZnO layer has significant impact on cell function and it leads to change in efficiency, open circuit voltage, and short circuit current and cell power