skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fourier transform infrared spectroscopy measurements of multi-phonon and free-carrier absorption in ZnO

Journal Article · · Journal of Electronic Materials
 [1];  [2];  [2];  [2];  [3]; ORCiD logo [1]
  1. Bowling Green State Univ., Bowling Green, OH (United States)
  2. Wright-Patterson Air Force Base, Dayton, OH (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Fourier transform infrared (FTIR) measurements were carried out on thin films and bulk single crystals of ZnO over a wide temperature range to study the free-carrier and multi-phonon infrared absorptions and the effects of hydrogen incorporation on these properties. Aluminum-doped ZnO thin films were deposited on quartz substrates using atomic-layer deposition (ALD) and sol–gel methods. Hall-effect measurements showed that the ALD films have a resistivity of ρ = 1.11 × 10–3 Ω cm, three orders of magnitude lower than sol–gel films (ρ = 1.25 Ω cm). This result is consistent with the significant difference in their free-carrier absorption as revealed by FTIR spectra obtained at room temperature. By reducing the temperature to 80 K, the free carriers were frozen out, and their absorption spectrum was suppressed. From the FTIR measurements on ZnO single crystals that were grown by the chemical vapor transport method, we identified a shoulder around 3350 cm–1 and associated it with the presence of two or more hydrogen ions in a Zn vacancy. After reducing the hydrogen level in the crystal, the measurements revealed the multi-phonon absorption of ZnO in the range of 700–1200 cm–1. Furthermore, this study shows that the multi-phonon absorption bands can be completely masked by the presence of a large concentration of hydrogen in the crystals.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1334469
Journal Information:
Journal of Electronic Materials, Vol. 45, Issue 12; ISSN 0361-5235
Publisher:
Springer
Country of Publication:
United States
Language:
English

References (55)

Hydrogen multicentre bonds journal December 2006
Magnetic resonance identification of hydrogen at a zinc vacancy in ZnO journal July 2013
Raman study of the influence of hydrogen on defects in ZnO journal June 2007
Residual Native Shallow Donor in ZnO journal March 1999
Photoconductive Detection of Tetrahedrally Coordinated Hydrogen in ZnO journal April 2012
Hydrogen Incorporation in Undoped ZnO Nanoparticles journal January 2011
Green Synthesis, Characterization And Optical Properties Of Zinc Oxide Nanosheets Using Olea Europea Leaf Extract journal September 2014
Efficient field emission from ZnO nanoneedle arrays journal July 2003
New developments in interference spectroscopy journal January 1960
Enhanced light output power of GaN-based light-emitting diodes by nano-rough indium tin oxide film using ZnO nanoparticles journal May 2011
Infrared electroabsorption of zinc oxide in the multi-phonon region journal April 1969
Multiphonon infrared absorption in zinc oxide journal March 1967
Infrared absorption spectroscopy of hydrogen-related defects in ZnO journal December 2003
Hydrogen in bulk and nanoscale ZnO journal April 2006
Induced conductivity in sol-gel ZnO films by passivation or elimination of Zn vacancies journal September 2016
ZnO Luminescence and scintillation studied via photoexcitation, X-ray excitation and gamma-induced positron spectroscopy journal August 2016
Effects of Substrate and Post-Growth Treatments on the Microstructure and Properties of ZnO Thin Films Prepared by Atomic Layer Deposition journal October 2016
Hydrogen as a Cause of Doping in Zinc Oxide journal July 2000
I. — les principes généraux des méthodes nouvelles en spectroscopie interférentielle - A propos de la théorie du spectromètre interférentiel multiplex journal January 1958
Structure and stability of O H donors in ZnO from high-pressure and infrared spectroscopy journal September 2005
Nature of Native Defects in ZnO journal August 2007
Nitrogen is a deep acceptor in ZnO journal April 2011
Hydrogen incorporation and diffusivity in plasma-exposed bulk ZnO journal January 2003
Optical and luminescence properties of zinc oxide (Review) journal November 2011
Infrared absorption on a complex comprising three equivalent hydrogen atoms in ZnO journal October 2015
Compensation mechanism for N acceptors in ZnO journal August 2001
Charge states of a hydrogen defect with a local vibrational mode at 3326 cm 1 in ZnO journal September 2010
Thermal diffusion of lithium acceptors into ZnO crystals journal July 2003
Donor characterization in ZnO by thermally stimulated luminescence journal July 2014
Über die Absorption von ZnO-Kristallen im Ultraroten journal October 1959
Transparent Conducting Oxides—An Up-To-Date Overview journal April 2012
Why nitrogen cannot lead to p-type conductivity in ZnO journal December 2009
Photon absorption in the Restrahlen band of thin films of GaN and AlN: Two phonon effects journal August 2005
Hydrogen local modes and shallow donors in ZnO journal November 2005
Oxygen Vacancy-Induced Structural, Optical, and Enhanced Supercapacitive Performance of Zinc Oxide Anchored Graphitic Carbon Nanofiber Hybrid Electrodes journal February 2016
Investigation of interstitial hydrogen and related defects in ZnO journal January 2012
Bistability of Hydrogen in ZnO: Origin of Doping Limit and Persistent Photoconductivity journal February 2014
Ionization Energies of Shallow Donor States in ZnO Created by Reversible Formation and Depletion of H Interstitials journal December 2008
Free carrier absorption and lattice vibrational modes in bulk ZnO journal April 2006
Electrical properties of bulk ZnO journal February 1998
Theory of Fe, Co, Ni, Cu, and their complexes with hydrogen in ZnO journal October 2005
ZnO growth by chemical vapour transport journal November 1999
Laboratory Measurements of Infrared Absorption Spectra of Hydrogen-Ordered ice: a step to the Exploration of ice xi in Space journal September 2009
Fabrication of semiconducting ZnO nanobelts using a halide source and their photoluminescence properties journal July 2002
Cu-doping of ZnO by nuclear transmutation journal November 2011
Infrared spectroscopy of hydrogen in ZnO journal November 2002
Infrared spectroscopy of hydrogen in annealed zinc oxide journal December 2003
A comprehensive review of ZnO materials and devices journal August 2005
Dominant hydrogen-oxygen complex in hydrothermally grown ZnO journal January 2005
Universal alignment of hydrogen levels in semiconductors, insulators and solutions journal June 2003
Defects in ZnO journal October 2009
Infrared absorption in zinc oxide crystals journal April 1959
Hydrogen-related defects in ZnO studied by infrared absorption spectroscopy journal October 2002
Hydrogen motion in ZnO journal December 2007
Synthesis and characterization of biocompatible ZnO nanoparticles journal January 2012