Double-heterojunction crystalline silicon solar cell with electron-selective TiO2 cathode contact fabricated at 100°C with open-circuit voltage of 640 mV

Janam Jhaveri, Ken A. Nagamatsu, Alexander H. Berg, Gabriel Man, Girija Sahasrabudhe, Sigurd Wagner, Jeffrey Schwartz, Antoine Kahn, James Christopher Sturm

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

5 Scopus citations

Abstract

A double-heterojunction c-Si solar cell was fabricated at maximum process temperature of 100°C. We demonstrate an electron-selective passivated contact to Si using TiO2, which increased the open-circuit voltage by 45 mV compared to a device with a direct metal to n-type substrate contact. In the fabricated structure, PEDOT/Si replaced the front-side p-n junction of conventional Si-based solar cells while the Si/TiO2 interface is formed on the back-side. Compared to previous work [1], the VOC has increased from 620 to 640 mV while maintaining a maximum process temperature of 100°C. Critical to the improved performance is better passivation of the Si/TiO2 interface. The increase in VOC can be attributed to an interface recombination velocity of ∼ 75 cm/s, which is consistent with photoconductance decay measurements.

Original languageEnglish (US)
Title of host publication2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479979448
DOIs
StatePublished - Dec 14 2015
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: Jun 14 2015Jun 19 2015

Publication series

Name2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015

Other

Other42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
CountryUnited States
CityNew Orleans
Period6/14/156/19/15

All Science Journal Classification (ASJC) codes

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

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    Jhaveri, J., Nagamatsu, K. A., Berg, A. H., Man, G., Sahasrabudhe, G., Wagner, S., Schwartz, J., Kahn, A., & Sturm, J. C. (2015). Double-heterojunction crystalline silicon solar cell with electron-selective TiO2 cathode contact fabricated at 100°C with open-circuit voltage of 640 mV. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 [7356054] (2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2015.7356054