The fundamental operation mechanisms determing the performance of tunnel recombination junctions revealed by a structural study using four different multijunction pv device architectures

Thierry De Vrijer, David Van Nijen, Harsh Parasramka, Arno H.M. Smets

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Tandem photovoltaic (PV) devices are receiving a lot of attention as the next step in PV for further increasing performance in combination with reducing the cost price per Watt peak. The integration of an effective tunnel recombination junction (TRJ) is crucial for efficient multijunction performance. In this work a rigorous and extensive study is presented that reveals the fundamental operating mechanisms that govern the TRJ performance. This is achieved by performing a structural study on the TRJ design in multiple tandem architectures based on different photovoltaic absorber layers. Experimental results are presented of a large number of tandem devices, including SHJ/nc-Si:H, nc-Si:H/a-Si:H, nc-Si:H/a-SiGe:H and a-SiGe:H/a-Si:H, in which the same p-layer design variations are applied. Across these device architectures the influence of the p-layer material properties, p-layer thickness, bilayer configurations and p-doped contact layer properties are investigated, to yield a unique insight into TRJ behavior.

Original languageEnglish
Title of host publication2021 IEEE 48th Photovoltaic Specialists Conference, PVSC 2021
PublisherIEEE
Pages283-286
Number of pages4
ISBN (Electronic)9781665419222
DOIs
Publication statusPublished - 2021
Event48th IEEE Photovoltaic Specialists Conference, PVSC 2021 - Fort Lauderdale, United States
Duration: 20 Jun 202125 Jun 2021

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Conference

Conference48th IEEE Photovoltaic Specialists Conference, PVSC 2021
Country/TerritoryUnited States
CityFort Lauderdale
Period20/06/2125/06/21

Keywords

  • multijunction
  • Silicon Heterojunction
  • tandem PV
  • thin film silicon
  • Tunnel recombination junction

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