Efficiency enhancement in Cu2ZnSnS4 solar cells with silica nanoparticles embedded in absorber layer

Balakrishna Ananthoju, Sundara Murthy Mopurisetty, Himanshu Tyagi, D. Bahadur, N. V. Medhekar, Swaroop Ganguly, M. Aslam

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

Abstract

Light trapping is essential to lower transmission losses in thin-film solar cells, particularly for wavelengths where the absorption is inefficient. We have embedded silica nanoparticles into a CZTS absorber layer resulting in localized as well as scattering field enhancement. UV-Vis absorption measurements show position (depth in the absorber layer) dependent improvement in the optical absorption with incorporation of silica nanoparticles; this has been explained using finite-difference-time-domain (FDTD) calculations of Mie scattering. The optical enhancement in turn leads to efficiency improvement as seen from electrical measurements; this has a slightly different position dependence that can also be understood theoretically. We observe maximal efficiency improvement, of about 21% compared to devices without nanoparticles (reference cell efficiency ∼ 4.13% and for particles at middle ∼ 5%), when nanoparticles are placed at the middle of the absorber layer.

Original languageEnglish
Title of host publication2015 IEEE 42nd Photovoltaic Specialists Conference, PVSC 2015
Subtitle of host publicationNew Orleans, Louisiana, USA; 14-19 June 2015
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages907-911
Number of pages5
ISBN (Electronic)9781479979448
DOIs
Publication statusPublished - 14 Dec 2015
EventIEEE Photovoltaic Specialists Conference 2015 - New Orleans, United States of America
Duration: 14 Jun 201519 Jun 2015
Conference number: 42nd
https://ieeexplore.ieee.org/xpl/conhome/7337615/proceeding (Proceedings)

Conference

ConferenceIEEE Photovoltaic Specialists Conference 2015
Abbreviated titlePVSC 2015
CountryUnited States of America
CityNew Orleans
Period14/06/1519/06/15
Internet address

Keywords

  • CZTS solar cell
  • Light trapping
  • Mie scattering
  • Power conversion efficiency (PCE)
  • Silica nanoparticles
  • UV-Vis absorption

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