Chalcopyrite-based Materials for intermediate band solar cells: Feasibility assessments based on thermodynamic calculations

Conesa Cegarra, José Carlos and Lucena García, Raquel and Wahnón Benarroch, Perla and Palacios Clemente, Pablo and Aguilera Bonet, Irene (2007). Chalcopyrite-based Materials for intermediate band solar cells: Feasibility assessments based on thermodynamic calculations. In: "22nd European Photovoltaic Solar Energyc Conference", 3-7 Sept 2007, Milán, Italia. ISBN 3936338221. pp. 2323-2326.

Description

Title: Chalcopyrite-based Materials for intermediate band solar cells: Feasibility assessments based on thermodynamic calculations
Author/s:
  • Conesa Cegarra, José Carlos
  • Lucena García, Raquel
  • Wahnón Benarroch, Perla
  • Palacios Clemente, Pablo
  • Aguilera Bonet, Irene
Item Type: Presentation at Congress or Conference (Article)
Event Title: 22nd European Photovoltaic Solar Energyc Conference
Event Dates: 3-7 Sept 2007
Event Location: Milán, Italia
Title of Book: Proceedings of the 22nd European Photovoltaic Solar Energyc Conference
Date: 2007
ISBN: 3936338221
Subjects:
Freetext Keywords: Intermediate band, High-Efficiency, Chalcopyrite, Modelling, Doping, Fundamentals, Spectroscopy
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

According to previous electronic structure calculations, substituting in CuGaS2 chalcopyrite some Ga atoms by Ti or Cr gives an intermediate band material that could lead to new photovoltaic cells of higher efficiency. New DFT calculations are now carried out to check the thermodynamic viability of such substituted structures. Total energy, disorder entropy and vibration (phonon) contributions are combined to obtain the free energy of formation of those materials from the closest known stable compounds. Except for low substitution levels and high temperatures, the substituted structures appear to be less stable than the simpler compounds, but to a extent smaller than Mn-doped GaAs, which can however be experimentally obtained. The solubility is computed to be lower for Ti than for Cr; the latter shows also some tendency to clustering. Hydrothermal synthesis of Cu(Ga,Cr)S2 has been undertaken, and characterization results suggest that the desired intermediate band electronic structure has been obtained.

Funding Projects

TypeCodeAcronymLeaderTitle
FP6SES-CT-2003-502620FULLSPECTRUMUnspecifiedA new PV wave making more efficient use of the solar spectrum
Government of SpainCSD-2006-0004GENESIS-FVUnspecifiedInvestigación en materia de una nueva generación de materiales, células y sistemas para la conversión fotovoltaica
Government of SpainMAT2006-10618CALIBANDUnspecifiedNuevos materiales fotovoltaicos de banda intermedia basados en calcogenuro

More information

Item ID: 62828
DC Identifier: http://oa.upm.es/62828/
OAI Identifier: oai:oa.upm.es:62828
Deposited by: Biblioteca ETSI Telecomunicación
Deposited on: 30 Jun 2020 10:20
Last Modified: 30 Jun 2020 10:20
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