High efficiency n-type silicon solar cells with local back surface fields formed by Laser Chemical Processing

Xinbo Yang, Andreas Fell, Evan Franklin, Lujia Xu, Daniel Macdonald, Klaus Weber

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

2 Scopus citations

Abstract

In this work, n-type silicon solar cells with local back surface field (LBSF) formed by Laser Chemical Processing (LCP) is presented. The effect of rear passivation layer and LBSF pitch on the efficiency is investigated. The SiO2/a-Si: H passivated contact is implemented into the n-type solar cells with LCP-LBSF. With the optimal pitch, an average efficiency of 20.4% and 19.8% is achieved on the LCP processed n-type solar cells with SiO2/SiNx stack and single SiNx rear passivation, respectively. Those cells' efficiency is mainly limited by the high surface recombination at the LCP doped regions. With the implementation of the SiO2/a-Si:H passivated contact to the LCP regions, an absolute efficiency gain of up to 1.5% is achieved for the n-type solar cells with SiNx rear passivation. The results show the potential to fabricate high efficiency n-type solar cells with simplified processing by using LCP and the passivated contact concept.

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
Externally publishedYes
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: Jun 14 2015Jun 19 2015

Other

Other42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
CountryUnited States
CityNew Orleans
Period06/14/1506/19/15

Keywords

  • laser chemical processing
  • local back surface field
  • n-type solar cell
  • passivated contact

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'High efficiency n-type silicon solar cells with local back surface fields formed by Laser Chemical Processing'. Together they form a unique fingerprint.

Cite this