Ultra-thin GaAs single-junction solar cells integrated with lattice-matched ZnSe as a reflective back scattering layer

Weiquan Yang, Charles Allen, Jing Jing Li, Hector Cotal, Christopher Fetzer, Shi Liu, Ding Ding, Stuart Farrell, Zhaoyu He, Hua Li, Hank Dettlaff, Nasser Karam, Yong-Hang Zhang

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

4 Citations (Scopus)

Abstract

This paper proposes the use of a monolithically integrated back scattering layer to improve the efficiency of ultra-thin GaAs single-junction solar cells. The device consists of a double-heterostructure GaAs/InGaP single-junction solar cell integrated with a lattice-matched ZnSe layer etched as the back scattering layer coated with a highly reflective Au film and flip-chip bonded on a carrier substrate. ZnSe surface was roughened to form different textures by wet etching. Without anti-reflective coating, 300×300 μm2 devices with a 300 nm GaAs active region and a reflective ZnSe/Au back scattering layer, demonstrate a short-circuit current density of 17.2 mA/cm 2, an open-circuit voltage of 0.915 V, and a power conversion efficiency of 11.8% under 1 sun solar radiation (AM 1.5G, 0.1 W/cm2). External quantum efficiency (EQE) measurements show EQE over 65% at 400 nm and 30% at 850 nm.

Original languageEnglish (US)
Title of host publicationConference Record of the IEEE Photovoltaic Specialists Conference
Pages978-981
Number of pages4
DOIs
StatePublished - 2012
Event38th IEEE Photovoltaic Specialists Conference, PVSC 2012 - Austin, TX, United States
Duration: Jun 3 2012Jun 8 2012

Other

Other38th IEEE Photovoltaic Specialists Conference, PVSC 2012
CountryUnited States
CityAustin, TX
Period6/3/126/8/12

Fingerprint

Solar cells
Scattering
Quantum efficiency
Reflective coatings
Wet etching
Open circuit voltage
Solar radiation
Short circuit currents
Sun
Conversion efficiency
Heterojunctions
Current density
Textures
Substrates

Keywords

  • GaAs
  • light scattering
  • photovoltaic cells
  • Single-junction solar cells
  • ZeSe

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering

Cite this

Yang, W., Allen, C., Li, J. J., Cotal, H., Fetzer, C., Liu, S., ... Zhang, Y-H. (2012). Ultra-thin GaAs single-junction solar cells integrated with lattice-matched ZnSe as a reflective back scattering layer. In Conference Record of the IEEE Photovoltaic Specialists Conference (pp. 978-981). [6317766] https://doi.org/10.1109/PVSC.2012.6317766

Ultra-thin GaAs single-junction solar cells integrated with lattice-matched ZnSe as a reflective back scattering layer. / Yang, Weiquan; Allen, Charles; Li, Jing Jing; Cotal, Hector; Fetzer, Christopher; Liu, Shi; Ding, Ding; Farrell, Stuart; He, Zhaoyu; Li, Hua; Dettlaff, Hank; Karam, Nasser; Zhang, Yong-Hang.

Conference Record of the IEEE Photovoltaic Specialists Conference. 2012. p. 978-981 6317766.

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

Yang, W, Allen, C, Li, JJ, Cotal, H, Fetzer, C, Liu, S, Ding, D, Farrell, S, He, Z, Li, H, Dettlaff, H, Karam, N & Zhang, Y-H 2012, Ultra-thin GaAs single-junction solar cells integrated with lattice-matched ZnSe as a reflective back scattering layer. in Conference Record of the IEEE Photovoltaic Specialists Conference., 6317766, pp. 978-981, 38th IEEE Photovoltaic Specialists Conference, PVSC 2012, Austin, TX, United States, 6/3/12. https://doi.org/10.1109/PVSC.2012.6317766
Yang W, Allen C, Li JJ, Cotal H, Fetzer C, Liu S et al. Ultra-thin GaAs single-junction solar cells integrated with lattice-matched ZnSe as a reflective back scattering layer. In Conference Record of the IEEE Photovoltaic Specialists Conference. 2012. p. 978-981. 6317766 https://doi.org/10.1109/PVSC.2012.6317766
Yang, Weiquan ; Allen, Charles ; Li, Jing Jing ; Cotal, Hector ; Fetzer, Christopher ; Liu, Shi ; Ding, Ding ; Farrell, Stuart ; He, Zhaoyu ; Li, Hua ; Dettlaff, Hank ; Karam, Nasser ; Zhang, Yong-Hang. / Ultra-thin GaAs single-junction solar cells integrated with lattice-matched ZnSe as a reflective back scattering layer. Conference Record of the IEEE Photovoltaic Specialists Conference. 2012. pp. 978-981
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