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Title: Optical absorption and disorder in delafossites

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4991388· OSTI ID:1415466
 [1];  [1];  [2];  [2];  [1];  [1];  [1];  [1]
  1. West Virginia Univ., Morgantown, WV (United States)
  2. The National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
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Here, we present compelling experimental results of the optical characteristics of transparent oxide CuGaO2 and related CuGa1-xFexO2 (with 0.00 ≤ x ≤ 0.05) alloys, whereby the forbidden electronic transitions for CuGaO2 become permissible in the presence of B-site (Ga sites) alloying with Fe. Our computational structural results imply a correlation between the global strain on the system and a decreased optical absorption edge. However, herein, we show that the relatively ordered CuGa1-xFexO2 (for 0.00 ≤ x ≤ 0.04) structures exhibit much weaker vis-absorption compared to the relatively disordered CuGa0.95Fe0.05O2.

Research Organization:
National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
HEPC.dsr.12.29; FE0004000
OSTI ID:
1415466
Alternate ID(s):
OSTI ID: 1368416
Report Number(s):
UNIV-PUB-393; TRN: US1800828
Journal Information:
Applied Physics Letters, Vol. 111, Issue 1; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

References (31)

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Charge Transport in ${\hbox{TiO}}_{2}$ Films With Complex Percolation Pathways Investigated by Time-Resolved Terahertz Spectroscopy journal May 2013
Symmetry-breaking-induced enhancement of visible light absorption in delafossite alloys journal June 2009
n-type electrical conduction in transparent thin films of delafossite-type AgInO2 journal March 1998
Optical and electronic properties of delafossite CuBO 2 p -type transparent conducting oxide journal September 2013
Titelbild: CuCrO 2 Delafossite: A Stable Copper Catalyst for Chlorine Production (Angew. Chem. 37/2013) journal August 2013
Electronic structure and optoelectronic properties of transparent p-type conducting CuAlO[sub 2] journal January 2000
Size-dependent optical properties of sputter-deposited nanocrystalline p-type transparent CuAlO2 thin films journal April 2005
Structural, electronic and optical properties of silver delafossite oxides: A first-principles study with hybrid functional journal August 2013
Terahertz conductivity in nanoscaled systems: effective medium theory aspects journal August 2014
Electrical and optical properties of Sn doped CuInO2 thin films: Conducting atomic force microscopy and spectroscopic ellipsometry studies journal September 2009
Electrical and optical properties of p-type CuFe 1-x Sn x O 2 (x = 0.03, 0.05) delafossite-oxide journal January 2013
Optoelectronic properties of Cu1−xPtxFeO2 (0 ≤ x ≤ 0.05) delafossite for p-type transparent conducting oxide journal January 2012
Structure and optoelectronic properties of spray deposited Mg doped p-CuCrO2 semiconductor oxide thin films journal July 2008
On the diffuse reflectance spectra of crystalline powders and amorphous thin oxide films journal February 1985
Synthesis and characterization of oxygen-rich delafossite CuYO2+x—Application to H2-photo production journal July 2007
Electrical characterization of transparent p–i–n heterojunction diodes journal December 2001
p-type electrical conduction in α-AgGaO2 delafossite thin films journal May 2006
On the band gap of CuAlO2 delafossite journal May 2006
The effect of electronic structure changes in NaInO 2 and NaIn 0.9 Fe 0.1 O 2 on the photoreduction of methylene blue journal January 2014
The effects of Bi alloying in Cu delafossites: A density functional theory study journal June 2011
Excitonic characteristics in direct wide-band-gap CuScO2 epitaxial thin films journal November 2009
Bipolar Doping and Band-Gap Anomalies in Delafossite Transparent Conductive Oxides journal January 2002
Synthesis, Characterization, Electronic Structure, and Photocatalytic Behavior of CuGaO 2 and CuGa 1– x Fe x O 2 ( x = 0.05, 0.10, 0.15, 0.20) Delafossites journal January 2012
CuBO2: A p-type transparent oxide journal August 2007
Nanocrystalline p -type transparent Cu–Al–O semiconductor prepared by chemical-vapor deposition with Cu(acac)2 and Al(acac)3 precursors journal June 2000
Broadband terahertz pulse emission from ZnGeP_2 journal January 2012
Group-IIIA versus IIIB delafossites: Electronic structure study journal July 2009
High-throughput calculations of alloyed delafossite materials: Application to CuGa1−xFexO2 journal April 2014
Synthesis and optoelectrical properties of AB O 2 ( A = Li, Na; B = Y, Yb) journal September 2011
Bipolarity in electrical conduction of transparent oxide semiconductor CuInO2 with delafossite structure journal March 2001

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