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Title: Iron as a source of efficient Shockley-Read-Hall recombination in GaN

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4964831· OSTI ID:1465786
 [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5];  [6];  [1]
  1. Univ. of California, Santa Barbara, CA (United States). Materials Dept.
  2. Univ. of California, Santa Barbara, CA (United States). Dept. of Physics
  3. Univ. of California, Santa Barbara, CA (United States). Materials Dept.; Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy
  4. Univ. of Vienna (Austria). Faculty of Physics, Computational Materials Physics
  5. KTH Royal Inst. of Technology, Stockholm (Sweden). Dept. of Materials and Nano Physics
  6. Center for Physical Sciences and Technology, Vilnius (Lithuania)

Transition metal impurities are known to adversely affect the efficiency of electronic and optoelectronic devices by introducing midgap defect levels that can act as efficient Shockley-Read-Hall centers. Iron impurities in GaN do not follow this pattern: their defect level is close to the conduction band and hence far from midgap. Here, using hybrid functional first-principles calculations, we uncover the electronic properties of Fe and we demonstrate that its high efficiency as a nonradiative center is due to a recombination cycle involving excited states. Unintentional incorporation of iron impurities at modest concentrations (1015 cm–3) leads to nanosecond nonradiative recombination lifetimes, which can be detrimental for the efficiency of electronic and optoelectronic devices.

Research Organization:
Univ. of California, Santa Barbara, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); European Union (EU)
Grant/Contract Number:
SC0010689; AC02-05CH11231; 657054
OSTI ID:
1465786
Alternate ID(s):
OSTI ID: 1329497
Journal Information:
Applied Physics Letters, Vol. 109, Issue 16; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (11)

Deep‐Level Defects and Impurities in InGaN Alloys journal April 2020
Field-assisted Shockley-Read-Hall recombinations in III-nitride quantum wells journal December 2017
Iron and intrinsic deep level states in Ga 2 O 3 journal January 2018
Compensation and persistent photocapacitance in homoepitaxial Sn-doped β-Ga 2 O 3 journal March 2018
GaN surface as the source of non-radiative defects in InGaN/GaN quantum wells journal September 2018
Photo-EPR study of compensated defects in Be-doped GaN substrates journal February 2019
Ultrafast bulk carrier dynamics in various GaN crystals at near-infrared wavelengths under one- and two-photon absorption journal March 2019
Recombination dynamics in GaInN/GaN quantum wells journal June 2019
Lifetime Degradation by Oxygen Precipitation Combined with Metal Contamination in Czochralski Silicon for Solar Cells journal January 2019
Electrical Properties, Deep Levels and Luminescence Related to Fe in Bulk Semi-Insulating β-Ga 2 O 3 Doped with Fe journal January 2019
Field-assisted Shockley-Read-Hall recombinations in III-Nitride quantum wells text January 2017