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Title: High-efficiency photovoltaics based on semiconductor nanostructures

Abstract

The objective of this project was to exploit a variety of semiconductor nanostructures, specifically semiconductor quantum wells, quantum dots, and nanowires, to achieve high power conversion efficiency in photovoltaic devices. In a thin-film device geometry, the objectives were to design, fabricate, and characterize quantum-well and quantum-dot solar cells in which scattering from metallic and/or dielectric nanostructures was employed to direct incident photons into lateral, optically confined paths within a thin (~1-3um or less) device structure. Fundamental issues concerning nonequilibrium carrier escape from quantum-confined structures, removal of thin-film devices from an epitaxial growth substrate, and coherent light trapping in thin-film photovoltaic devices were investigated. In a nanowire device geometry, the initial objectives were to engineer vertical nanowire arrays to optimize optical confinement within the nanowires, and to extend this approach to core-shell heterostructures to achieve broadspectrum absorption while maintaining high opencircuit voltages. Subsequent work extended this approach to include fabrication of nanowire photovoltaic structures on low-cost substrates.

Authors:
 [1];  [2];  [1]
  1. University of California, San Diego
  2. University of Texas at Austin
Publication Date:
Research Org.:
Univ. of California, Oakland, CA (United States); Univ. of California, San Diego, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
University of California, San Diego, University of Texas at Austin, NASA Jet Propulsion Laboratory and the University of Karlsruhe
OSTI Identifier:
1083988
Report Number(s):
DOE08GO180163
2007-4314
DOE Contract Number:  
FG36-08GO18016
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Yu, Paul K.L., Yu, Edward T., and Wang, Deli. High-efficiency photovoltaics based on semiconductor nanostructures. United States: N. p., 2011. Web. doi:10.2172/1083988.
Yu, Paul K.L., Yu, Edward T., & Wang, Deli. High-efficiency photovoltaics based on semiconductor nanostructures. United States. doi:10.2172/1083988.
Yu, Paul K.L., Yu, Edward T., and Wang, Deli. Mon . "High-efficiency photovoltaics based on semiconductor nanostructures". United States. doi:10.2172/1083988. https://www.osti.gov/servlets/purl/1083988.
@article{osti_1083988,
title = {High-efficiency photovoltaics based on semiconductor nanostructures},
author = {Yu, Paul K.L. and Yu, Edward T. and Wang, Deli},
abstractNote = {The objective of this project was to exploit a variety of semiconductor nanostructures, specifically semiconductor quantum wells, quantum dots, and nanowires, to achieve high power conversion efficiency in photovoltaic devices. In a thin-film device geometry, the objectives were to design, fabricate, and characterize quantum-well and quantum-dot solar cells in which scattering from metallic and/or dielectric nanostructures was employed to direct incident photons into lateral, optically confined paths within a thin (~1-3um or less) device structure. Fundamental issues concerning nonequilibrium carrier escape from quantum-confined structures, removal of thin-film devices from an epitaxial growth substrate, and coherent light trapping in thin-film photovoltaic devices were investigated. In a nanowire device geometry, the initial objectives were to engineer vertical nanowire arrays to optimize optical confinement within the nanowires, and to extend this approach to core-shell heterostructures to achieve broadspectrum absorption while maintaining high opencircuit voltages. Subsequent work extended this approach to include fabrication of nanowire photovoltaic structures on low-cost substrates.},
doi = {10.2172/1083988},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {10}
}