Overcoming phosphorus emitter limitations in PERC Si solar cells by using a gallium-phosphide heteroemitter

Hannes Wagner, Tobias Ohrdes, Amir Dastgheib-Shirazi, Binesh Puthen-Veettil, Dirk König, Pietro P. Altermatt

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

Abstract

The performance of PERC Si solar cells is often limited by recombination in the emitter. We use numerical device simulations to evaluate efficiency limits of different types of phosphorus emitters in an example of a realistic PERC cell. The resulting maximum efficiencies are between 20.5% and 21.2%. The same cell simulated with an emitter made of an n-doped crystalline gallium phosphide layer shows an efficiency limit of 21.6%. This hetero-emitter causes much lower recombination losses than a nearly ideal phosphorus emitter, resulting in a higher Voc. In addition a lower base doping is necessary which, in turn, reduces the impact of the boron-oxygen complex.

Original languageEnglish
Title of host publication2013 IEEE 39th Photovoltaic Specialists Conference (PVSC)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages896-899
Number of pages4
ISBN (Electronic)9781479932993, 9781479932986
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event39th IEEE Photovoltaic Specialists Conference, PVSC 2013 - Tampa, FL, United States
Duration: 16 Jun 201321 Jun 2013

Publication series

Name
ISSN (Print)0160-8371

Conference

Conference39th IEEE Photovoltaic Specialists Conference, PVSC 2013
CountryUnited States
CityTampa, FL
Period16/06/1321/06/13

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