Stability of Silicon Heterojunction Solar Cells Having Hydrogen Plasma Treated Intrinsic Layer

Anishkumar Soman, Gbenga Obikoya, Steve Johnston, Steven Harvey, Ujjwal Das, Steven Hegedus

Research output: Contribution to conferencePaperpeer-review

1 Scopus Citations

Abstract

The open-circuit voltage of Silicon Heterojunction (HJ) cells can be improved by using extrinsic hydrogen plasma treatment (HPT) to reduce the trap states (NT) which we have verified using Deep Level Transient Spectroscopy (DLTS). However, hydrogen has been associated with long-term degradation. We have investigated the stability of HJ cells with and without HPT using accelerated degradation (1-sun illumination, boldsymbol{90 { circ}} mathbf{C} temperature, argon ambient for 1000 hours). The stability has been studied using DLTS, current-voltage, and Suns-Voc. Our results show HPT cells are stable and maintain their higher Voc and lower NT after accelerated degradation.

Original languageAmerican English
Pages643-645
Number of pages3
DOIs
StatePublished - 2022
Event49th IEEE Photovoltaics Specialists Conference, PVSC 2022 - Philadelphia, United States
Duration: 5 Jun 202210 Jun 2022

Conference

Conference49th IEEE Photovoltaics Specialists Conference, PVSC 2022
Country/TerritoryUnited States
CityPhiladelphia
Period5/06/2210/06/22

Bibliographical note

Publisher Copyright:
© 2022 IEEE.

NREL Publication Number

  • NREL/CP-5K00-85067

Keywords

  • degradation
  • heterojunction
  • hydrogen passivation
  • light soaking
  • reliability
  • silicon solar cells

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