Evaluating the Impact of and Solutions to Light-induced Degradation in Silicon Heterojunction Solar Cells

Daniel Chen, William Weigand, Matthew Wright, Moonyong Kim, Jianwei Shi, Zhengshan Jason Yu, Bruno Vicari Stefani, Anastasia Soeriyadi, Zachary Holman, Brett Hallam

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Silicon heterojunction (SHJ) solar cells have recently seen a boost in popularity sparked from their high efficiency capabilities. In order to reduce cost, some studies have demonstrated the potential of p-type wafers as an alternative base material. However, very few studies have investigated the existence and influence of light-induced degradation (LID) on SHJ solar cells, a problem which has been a significant hurdle for conventional p-type devices. In this work, we first identify the presence of and severity of LID in SHJ devices. A modified UNSW advanced hydrogenation process suitable for low-temperature SHJ fabrication is used to passivate any defects responsible for LID. We demonstrate efficiency enhancements of up to 2.2%abs resulting in stable p-type Cz SHJ solar cell efficiencies of 20.6%.

Original languageEnglish (US)
Title of host publication2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1099-1103
Number of pages5
ISBN (Electronic)9781728104942
DOIs
StatePublished - Jun 2019
Event46th IEEE Photovoltaic Specialists Conference, PVSC 2019 - Chicago, United States
Duration: Jun 16 2019Jun 21 2019

Publication series

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

Conference

Conference46th IEEE Photovoltaic Specialists Conference, PVSC 2019
CountryUnited States
CityChicago
Period6/16/196/21/19

Keywords

  • boron-oxygen defect
  • hydrogenation
  • passivation
  • silicon heterojunction

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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