Microcrystalline silicon carrier collectors for silicon heterojunction solar cells and impact on low-temperature device characteristics

Gizem Nogay, Johannes Peter Seif, Yannick Riesen, Andrea Tomasi, Loris Barraud, Nicolas Wyrsch, Franz Josef Haug, Stefaan De Wolf, Christophe Ballif

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

2 Scopus citations

Abstract

Silicon heterojunction solar cells usually employ doped amorphous silicon layers as carrier selective contacts. However, these layers may cause parasitic optical absorption losses and moderate fill factor values due to high contact resistivity with the transparent electrodes. In this study, we show that the replacement of the amorphous doped layers with microcrystalline one is beneficial for both optical and electrical aspects which include a better Jsc when they are applied to the front, lower contact resistivity compared to amorphous layers and better FF thanks to the crystalline phase and the higher doping efficiency. Strikingly, hole collecting microcrystalline layer suppresses the transport barrier effect occurs at valance band offset, allowing a FF in the range of 70% at -100 °C while it is dropping to 40% for standard amorphous doped layers.

Original languageEnglish (US)
Title of host publication2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-3
Number of pages3
ISBN (Electronic)9781509056057
DOIs
StatePublished - May 25 2018
Event44th IEEE Photovoltaic Specialist Conference, PVSC 2017 - Washington, United States
Duration: Jun 25 2017Jun 30 2017

Publication series

Name2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017

Conference

Conference44th IEEE Photovoltaic Specialist Conference, PVSC 2017
CountryUnited States
CityWashington
Period06/25/1706/30/17

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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