Optical properties of ZnO/ZnS and ZnO/ZnTe heterostructures forphotovoltaic applications

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Although ZnO and ZnS are abundant, stable, environmentallybenign, their band gap energies (3.44 eV, 3.72 eV) are too large foroptimal photovoltaic efficiency. By using band-corrected pseudopotentialdensity-functional theory calculations, we study how the band gap,opticalabsorption, and carrier localization canbe controlled by formingquantum-well like and nanowire-based heterostructures ofZnO/ZnS andZnO/ZnTe. In the case of ZnO/ZnS core/shell nanowires, which can besynthesized using existing methods, we obtain a band gap of 2.07 eV,which corresponds to a Shockley-Quiesser efficiency limitof 23 percent.Based on these nanowire results, we propose that ZnO/ZnScore/shellnanowires can be used as photovoltaic devices with organic polymersemiconductors as p-channel contacts.

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Schrier, Joshua; Demchenko, Denis O.; Wang, Lin-Wang & Alivisatos,A. Paul May 1, 2007.

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Although ZnO and ZnS are abundant, stable, environmentallybenign, their band gap energies (3.44 eV, 3.72 eV) are too large foroptimal photovoltaic efficiency. By using band-corrected pseudopotentialdensity-functional theory calculations, we study how the band gap,opticalabsorption, and carrier localization canbe controlled by formingquantum-well like and nanowire-based heterostructures ofZnO/ZnS andZnO/ZnTe. In the case of ZnO/ZnS core/shell nanowires, which can besynthesized using existing methods, we obtain a band gap of 2.07 eV,which corresponds to a Shockley-Quiesser efficiency limitof 23 percent.Based on these nanowire results, we propose that ZnO/ZnScore/shellnanowires can be used as photovoltaic devices with organic polymersemiconductors as p-channel contacts.

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  • Journal Name: Nano Letters; Journal Volume: 7; Journal Issue: 8; Related Information: Journal Publication Date: 2007

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  • Report No.: LBNL--62616
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1021/nl071027k | External Link
  • Office of Scientific & Technical Information Report Number: 928786
  • Archival Resource Key: ark:/67531/metadc895510

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  • May 1, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 31, 2016, 3:55 p.m.

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Schrier, Joshua; Demchenko, Denis O.; Wang, Lin-Wang & Alivisatos,A. Paul. Optical properties of ZnO/ZnS and ZnO/ZnTe heterostructures forphotovoltaic applications, article, May 1, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc895510/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.