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Journal of Applied Science & Engineering

Dhaka University Journal of Applied Science & Engineering

Issue: Vol. 5, No. 1 & 2, January & July 2020
Title: Performance Study of an Interdigitated Back Contact Si Solar Cell using TCAD

Keywords: IBC solar cell, TCAD, modeling

In this study, a functional interdigitated back contact heterojunction silicon solar cell (IBC-SHJ) was designed and its electrical characteristics were analyzed using technology computer aided (TCAD) device simulation tool. Having rear contacts exposes the entire front surface of an IBC-SHJ solar cell to the solar spectrum, thereby, enabling it to attain higher efficiency compared to traditional solar cells with front contacts. Performance of the IBC-SHJ cell was rigorously studied with respect to the thickness and material of the antireflective coating (ARC) as well changing doping concentration of amorphous silicon (a-Si) layer. The efficiency (ƞ) of the proposed design is extracted from the characteristic I-V curves under various conditions. Optimizing the design parameters, a maximum efficiency of ~25% was achieved for 200nm thick Si3N4 ARC and with a doping concentration of 1020cm-3 in the a-Si layer. The results obtained from this simulation study were found to be consistent with experimental data available in the literature.

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