Assessing possibilities and limits for solar cells

Pabitra K. Nayak, Juan Bisquert, David Cahen

Research output: Contribution to journalArticlepeer-review

125 Scopus citations

Abstract

What are the solar cell efficiencies that we can strive towards? We show here that several simple criteria, based on cell and module performance data, serve to evaluate and compare all types of today's solar cells. Analyzing these data allows to gauge in how far significant progress can be expected for the various cell types and, most importantly from both the science and technology points of view, if basic bounds, beyond those known today, may exist, that can limit such progress. This is important, because half a century after Shockley and Queisser (SQ) presented limits, based on detailed balance calculations for single absorber solar cells, those are still held to be the only ones, we need to consider; most efforts to go beyond SQ are directed towards attempts to circumvent them, primarily via smart optics, or optoelectronics. After formulating the criteria and analyzing known loss mechanisms, use of such criteria suggests-additional limits for newer types of cells, Organic and Dye-Sensitized ones, and their siblings,-prospects for progress and-further characterization needs, all of which should help focusing research and predictions for the future. Several simple criteria, based on cell and module performance data, are used to evaluate and compare all types of today's solar cells. Analyzing these data allows to gauge in how far significant progress can be expected for the various cell types and if basic bounds, beyond those known today, may exist, that can limit such progress.

Original languageEnglish
Pages (from-to)2870-2876
Number of pages7
JournalAdvanced Materials
Volume23
Issue number25
DOIs
StatePublished - 5 Jul 2011
Externally publishedYes

Keywords

  • Shockley and Queisser limit
  • over-potential
  • solar cells
  • tail states

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