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Photoluminescence-based measurements of the energy gap and diffusion length of Zn_3P_2

Kimball, Gregory M. and Müller, Astrid M. and Lewis, Nathan S. and Atwater, Harry A. (2009) Photoluminescence-based measurements of the energy gap and diffusion length of Zn_3P_2. Applied Physics Letters, 95 (11). Art. No. 112103. ISSN 0003-6951. doi:10.1063/1.3225151.

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The steady-state photoluminescence spectra of zinc phosphide (Zn_3P_2) wafers have revealed a fundamental indirect band gap at 1.38 eV, in close proximity to the direct band gap at 1.50 eV. These values are consistent with the values for the indirect and direct band gaps obtained from analysis of the complex dielectric function deduced from spectroscopic ellipsometric measurements. Bulk minority carrier lifetimes of 20 ns were observed by time-resolved photoluminescence decay measurements, implying minority-carrier diffusion lengths of ≥ 7 µm.

Item Type:Article
Related URLs:
URLURL TypeDescription
Müller, Astrid M.0000-0002-2785-6808
Lewis, Nathan S.0000-0001-5245-0538
Atwater, Harry A.0000-0001-9435-0201
Additional Information:©2009 American Institute of Physics. Received 29 June 2009; accepted 20 August 2009; published 14 September 2009. This work was supported by the Office of Energy Efficiency and Renewable Energy, U.S. Department of Energy under Grant No. DE-FG36-08GO18006, as well as Caltech Center for Sustainable Energy Research (CCSER). We acknowledge use of facilities supported by the Beckman Institute Laser Resource Center (BILRC). One of us (G.M.K.) acknowledges support under an NDSEG graduate fellowship.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG36-08GO18006
Caltech Center for Sustainable Energy ResearchUNSPECIFIED
Caltech Beckman InstituteUNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Subject Keywords:carrier lifetime, dielectric function, energy gap, photoluminescence, time resolved spectra, zinc compounds
Issue or Number:11
Classification Code:PACS 78.55.Hx; 78.20.Ci; 71.45.Gm; 72.20.Jv; 78.47.Cd; 72.80.Jc
Record Number:CaltechAUTHORS:20091013-093453282
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16318
Deposited By: George Porter
Deposited On:13 Oct 2009 18:39
Last Modified:08 Nov 2021 23:26

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