Sputter-instigated plasmon-enhanced optical backscattering layer in ultrathin solar cells: Application of GZO in CIGSe material system

Vivek Garg, Brajendra S. Sengar, Pankaj Sharma, Amitesh Kumar, Aaryashree, Shailendra Kumar, Shaibal Mukherjee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Recently, realization of ultrathin solar cells is the area of interest of researchers in the domain of cost-effective photovoltaics. This study demonstrates a novel way of generation of plasmonic features in transparent conducting oxide material in the form of Ga-doped ZnO (GZO) thin films to compensate for the loss of optical absorption due to reduced absorber thickness. Through an extensive analysis of photoelectron spectroscopy, spectroscopic ellipsometry, and field emission scanning electron microscope measurements the evaluation of plasmonic features and correlation of them with various metallic and metal-oxide nanoclusters inside GZO thin film and GZO/CIGSe heterojunction interface are carried out. Moreover, we have thoroughly analyzed the applicability of GZO plasmon enhanced thin film as a backscattering layer based on (a) verification of plasmonic behavior in GZO film (∼150 nm), (b) checking on the sustainability of such plasmonic behavior in ultrathin GZO (∼5 nm) layer, (c) investigation of plasmonic feature at the heterojunction, (d) band offset studies at the plasmon-enhanced-GZO/CIGSe heterojunction, and (e) investigating the electrical performance of the junction to verify the linear behavior and resistivity calculation of the heterojunction.

Original languageEnglish
Pages (from-to)35-44
Number of pages10
JournalSolar Energy
Volume174
DOIs
Publication statusPublished - 2018 Nov 1
Externally publishedYes

Keywords

  • Band offset
  • CIGSe
  • DIBS
  • Plasmonics
  • TCO
  • UPS
  • Ultrathin solar cells
  • XPS

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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