The Influence of Spectral Albedo on Bifacial Solar Cells: A Theoretical and Experimental Study

Thomas C.R. Russell, Rebecca Saive, Andre Augusto, Stuart Bowden, Harry A. Atwater

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

We have investigated the influence of the spectral albedo on the power output of bifacial solar cells. We adapted the Shockley–Queisser radiative flux balance framework to account for a variation of the spectrum and intensity of the incoming light. We find that the ideal band gap and the maximum efficiency depend on the spectral albedo of the surroundings and that optimal cell performance cannot be assessed when only accounting for a spectrally independent albedo. With a spectral albedo model, we predict that the power output for a bifacial silicon solar cell surrounded by green grass is 3.1% higher than for a wavelength-independent albedo, and even 5.2% higher for white sand. We experimentally verify this trend for silicon heterojunction solar cells and we derive the ideal spectral albedo.

Original languageEnglish (US)
JournalIEEE Journal of Photovoltaics
DOIs
StateAccepted/In press - Oct 7 2017

Keywords

  • Bifacial solar cells
  • Shockley–Queisser limit
  • spectral albedo
  • thermodynamic efficiency limit

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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