"High Quantum Efficiency of Band-Edge Emission from ZnO Nanowires"

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External quantum efficiency (EQE) of photoluminescence as high as 20 percent from isolated ZnO nanowires were measured at room temperature. The EQE was found to be highly dependent on photoexcitation density, which underscores the importance of uniform optical excitation during the EQE measurement. An integrating sphere coupled to a microscopic imaging system was used in this work, which enabled the EQE measurement on isolated ZnO nanowires. The EQE values obtained here are significantly higher than those reported for ZnO materials in forms of bulk, thin films or powders. Additional insight on the radiative extraction factor of one-dimensional nanostructures was gained ... continued below

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GARGAS, DANIEL; GAO, HANWEI; WANG, HUNGTA & PEIDONG, YANG December 1, 2010.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 12 times . More information about this article can be viewed below.

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External quantum efficiency (EQE) of photoluminescence as high as 20 percent from isolated ZnO nanowires were measured at room temperature. The EQE was found to be highly dependent on photoexcitation density, which underscores the importance of uniform optical excitation during the EQE measurement. An integrating sphere coupled to a microscopic imaging system was used in this work, which enabled the EQE measurement on isolated ZnO nanowires. The EQE values obtained here are significantly higher than those reported for ZnO materials in forms of bulk, thin films or powders. Additional insight on the radiative extraction factor of one-dimensional nanostructures was gained by measuring the internal quantum efficiency of individual nanowires. Such quantitative EQE measurements provide a sensitive, noninvasive method to characterize the optical properties of low-dimensional nanostructures and allow tuning of synthesis parameters for optimization of nanoscale materials.

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  • Journal Name: Nano Letters; Journal Volume: 10.1021/nl201850k; Journal Issue: August 2011; Related Information: Journal Publication Date: 08/22/2011

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  • Report No.: LBNL-5412E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1082194
  • Archival Resource Key: ark:/67531/metadc845311

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  • December 1, 2010

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  • May 19, 2016, 9:45 a.m.

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  • June 16, 2016, 12:54 p.m.

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GARGAS, DANIEL; GAO, HANWEI; WANG, HUNGTA & PEIDONG, YANG. "High Quantum Efficiency of Band-Edge Emission from ZnO Nanowires", article, December 1, 2010; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc845311/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.