Photolithography-free interdigitated back-contacted silicon heterojunction solar cells with efficiency >21%

Andrea Tomasi, Bertrand Paviet-Salomon, Damien Lachenal, Silvia Martin De Nicolas, Martin Ledinsky, Antoine Descoeudres, Sylvain Nicolay, Stefaan De Wolf, Christophe Ballif

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

8 Scopus citations

Abstract

We report on the development of interdigitated back-contacted silicon heterojunction solar cells with conversion efficiencies well above 21%. Doped hydrogenated amorphous silicon layers, needed for electron and hole collection, are patterned via in-situ shadow masking whereas transparent conductive oxide and metal layers, of the back electrodes, are defined via hot melt inkjet printing of an etch resist and subsequent wet etching. Our technology is therefore photolithography-free and avoids any high-temperature step. The best fabricated solar cell presents a high short-circuit current density of 39.9 mA/cm2, an open-circuit voltage of 724 mV and a fill factor of 74.5% resulting in a conversion efficiency of 21.5%, with a strong upside potential. We report also on a silver-free IBC-SHJ solar cell with conversion efficiency >20%.

Original languageEnglish (US)
Title of host publication2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3644-3648
Number of pages5
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
Period06/8/1406/13/14

Keywords

  • Amorphous silicon
  • crystalline silicon
  • heterojunctions
  • photovoltaic cells
  • solar cells

ASJC Scopus subject areas

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

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