Effect of 1-D silver grated electrode on wafer‐based TOPCon c-Si solar cell

Abstract

A modified structure of Anti reflection coating (ARC) less wafer based 200 μm thick c-Si Solar cell with tunnel oxide passivated contact (TOPCon) solar cell is proposed with 1-Dimensional silver grated rear electrode. The light diffraction mechanism increases the light path length, which improves the absorption of photons in the absorber layer. An effective investigation mechanism using numerical simulator is used to study the absorption and reflection with perfectly matched boundary conditions for higher accuracy of result. The performance enhancement of TOPCon solar cell with the variation in oxide thickness is observed and effect of 1-D silver grating in designed cell is examined. Maximum absorption is achieved using optimum rear electrode grated structure. The performance of the modified rear electrode SCs are compared with similar Si solar cell design methodology to show the effectiveness of modifications. The modified Si SC shows 160 % and TOPCon solar cell exhibits 190 % enhancement in the current density with optimized silver grated rear electrode. Similarly, an improved efficiency of 9.26 % for modified silver grated Si solar cell and maximum efficiency of 20.8 % is achieved for TOPCon solar cell with 1-D grated rear electrode.