TCAD Modeling of Interdigitated Back Contact Solar Cells with Hybrid Diffusion and Tunnel Oxide Passivated Contacts

Chien Chi Huang, Ting Yun Yang, Ling Yu Wang, Han Chen Chang, Ming Tsun Kuo, Ya Ping Wen, Chorng Jye Huang, Peichen Yu*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The interdigitated back contact (IBC) silicon solar cells such as heterojunction with an intrinsic thin-film (HIT) and polycrystalline silicon on oxide (POLO) have both achieved a record power conversion efficiency (PCE) exceeding 26%. However, the complicated fabrication procedures and high cost currently hinder the deployment of these novel IBC solar cells in the photovoltaic market. Here, we investigate an n-type IBC solar cell architecture incorporating hybrid diffusion and tunnel oxide passivated contacts (TOPCon) to mitigate the fabrication complexity. A Sentaurus TCAD model which takes into account the tunneling mechanism of silicon oxides is developed and validated with a fabricated device. Subsequently, we investigate the impact of design parameters such as the anode/cathode ratio, the anode width with a fixed gap size, and the deviation of the laser contact openings. Based on the correlations between the design parameters and device characteristics, we can choose a practical device design. Finally, we demonstrate an IBC solar cell with a PCE of 20.3% fabricated with an improved metal contact process that lowers the contact resistivity.

Original languageEnglish
Title of host publication2021 IEEE 48th Photovoltaic Specialists Conference, PVSC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages502-506
Number of pages5
ISBN (Electronic)9781665419222
DOIs
StatePublished - 20 Jun 2021
Event48th IEEE Photovoltaic Specialists Conference, PVSC 2021 - Fort Lauderdale, United States
Duration: 20 Jun 202125 Jun 2021

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Conference

Conference48th IEEE Photovoltaic Specialists Conference, PVSC 2021
Country/TerritoryUnited States
CityFort Lauderdale
Period20/06/2125/06/21

Keywords

  • Heterojunction with interdigitated Back Contacts
  • Interdigitated Back Contacts
  • TCAD

Fingerprint

Dive into the research topics of 'TCAD Modeling of Interdigitated Back Contact Solar Cells with Hybrid Diffusion and Tunnel Oxide Passivated Contacts'. Together they form a unique fingerprint.

Cite this