Stable low-recombination n-Si/TiO2 hole-blocking interface and its effect on silicon heterojunction photovoltaics

Janam Jhaveri, Sushobhan Avasthi, Ken Nagamatsu, James Christopher Sturm

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

18 Scopus citations

Abstract

TiO2 deposited on (100) crystalline silicon at near room temperature results in a hole-blocking, electron-transparent heterojunction. In this paper, we show that this interface can have a minority carrier recombination velocity on the order of 100 cm/s, which is stable for over 5 months in air. Second, we model the effect of such interfaces to replace the diffused n+/n (back surface field) layer at the cathode of p+/n and double heterojunction crystalline silicon solar cells. Simulations show that using TiO2/n-Si with the measured values of interface recombination velocity as a replacement for the n+/n diffusion at the cathode contact would yield power conversion efficiencies greater than 23%.

Original languageEnglish (US)
Title of host publication2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1525-1528
Number of pages4
ISBN (Electronic)9781479943982
DOIs
StatePublished - Oct 15 2014
Event40th IEEE Photovoltaic Specialist Conference, PVSC 2014 - Denver, United States
Duration: Jun 8 2014Jun 13 2014

Publication series

Name2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014

Other

Other40th IEEE Photovoltaic Specialist Conference, PVSC 2014
CountryUnited States
CityDenver
Period6/8/146/13/14

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Keywords

  • heterojunction
  • photovoltaic cells
  • silicon
  • titanium oxide

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    Jhaveri, J., Avasthi, S., Nagamatsu, K., & Sturm, J. C. (2014). Stable low-recombination n-Si/TiO2 hole-blocking interface and its effect on silicon heterojunction photovoltaics. In 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014 (pp. 1525-1528). [6925206] (2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2014.6925206