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Title: Approaching the Shockley-Queisser limit: General assessment of the main limiting mechanisms in photovoltaic cells

In principle, the upper efficiency limit of any solar cell technology can be determined using the detailed-balance limit formalism. However, “real” solar cells show efficiencies which are always below this theoretical value due to several limiting mechanisms. We study the ability of a solar cell architecture to approach its own theoretical limit, using a novel index introduced in this work, and the amplitude with which the different limiting mechanisms affect the cell efficiency is scrutinized as a function of the electronic gap and the illumination level to which the cell is submitted. The implications for future generations of solar cells aiming at an improved conversion of the solar spectrum are also addressed.
Authors:
; ;  [1] ; ;  [2]
  1. CNRS-PROMES, 7 Rue du Four Solaire, 66120 Odeillo (France)
  2. Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, 3000 boul. de l'Université, Sherbrooke, Quebec J1K 0A5 (Canada)
Publication Date:
OSTI Identifier:
22399228
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRONIC STRUCTURE; EMISSION SPECTRA; ENERGY EFFICIENCY; ENERGY GAP; ILLUMINANCE; INDEXES; QUANTUM EFFICIENCY; SOLAR CELLS; SOLAR ENERGY CONVERSION