Calcium as a nonradiative recombination center in InGaN

Jimmy-Xuan Shen; Darshana Wickramaratne; Cyrus E. Dreyer; Audrius Alkauskas; Erin Young; James S. Speck; Chris G. Van de Walle

doi:10.7567/apex.10.021001

Calcium as a nonradiative recombination center in InGaN

Jimmy-Xuan Shen, Darshana Wickramaratne, Cyrus E. Dreyer, Audrius Alkauskas, Erin Young, James S. Speck, Chris G. Van de Walle

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Calcium can be unintentionally incorporated during the growth of semiconductor devices. Using hybrid functional first-principles calculations, we assess the role of Ca impurities in GaN. Ca substituted on the cation site acts as a deep acceptor with a level ~1 eV above the GaN valence-band maximum. We find that for Ca concentrations of 1017 cm−3, the Shockley–Read–Hall recombination coefficient, A, of InGaN exceeds 106 s−1 for band gaps less than 2.5 eV. A values of this magnitude can lead to significant reductions in the efficiency of light-emitting diodes.

Original language	English (US)
Pages (from-to)	021001
Journal	Applied Physics Express
Volume	10
Issue number	2
DOIs	https://doi.org/10.7567/apex.10.021001
State	Published - Jan 13 2017
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: J.S., D.W., and C.V.d.W were supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) under Award No. DE-SC0010689. A.A. was supported by the Marie Sklodowska-Curie Action of the European Union (Project Nitride-SRH, Grant No. 657054). E.Y. and J.S.S. were supported by the KACST-KAUST-UCSB Solid State Lighting Program. Additional support was provided by the National Science Foundation IMI Program (Grant No. DMR08-43934). Computational resources were provided by the National Energy Research Scientific Computing Center, which is supported by the DOE Office of Science under Contract No. DE-AC02-05CH11231.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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title = "Calcium as a nonradiative recombination center in InGaN",

abstract = "Calcium can be unintentionally incorporated during the growth of semiconductor devices. Using hybrid functional first-principles calculations, we assess the role of Ca impurities in GaN. Ca substituted on the cation site acts as a deep acceptor with a level ~1 eV above the GaN valence-band maximum. We find that for Ca concentrations of 1017 cm−3, the Shockley–Read–Hall recombination coefficient, A, of InGaN exceeds 106 s−1 for band gaps less than 2.5 eV. A values of this magnitude can lead to significant reductions in the efficiency of light-emitting diodes.",

author = "Jimmy-Xuan Shen and Darshana Wickramaratne and Dreyer, {Cyrus E.} and Audrius Alkauskas and Erin Young and Speck, {James S.} and {Van de Walle}, {Chris G.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: J.S., D.W., and C.V.d.W were supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) under Award No. DE-SC0010689. A.A. was supported by the Marie Sklodowska-Curie Action of the European Union (Project Nitride-SRH, Grant No. 657054). E.Y. and J.S.S. were supported by the KACST-KAUST-UCSB Solid State Lighting Program. Additional support was provided by the National Science Foundation IMI Program (Grant No. DMR08-43934). Computational resources were provided by the National Energy Research Scientific Computing Center, which is supported by the DOE Office of Science under Contract No. DE-AC02-05CH11231. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

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AU - Shen, Jimmy-Xuan

AU - Wickramaratne, Darshana

AU - Dreyer, Cyrus E.

AU - Alkauskas, Audrius

AU - Young, Erin

AU - Speck, James S.

AU - Van de Walle, Chris G.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: J.S., D.W., and C.V.d.W were supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) under Award No. DE-SC0010689. A.A. was supported by the Marie Sklodowska-Curie Action of the European Union (Project Nitride-SRH, Grant No. 657054). E.Y. and J.S.S. were supported by the KACST-KAUST-UCSB Solid State Lighting Program. Additional support was provided by the National Science Foundation IMI Program (Grant No. DMR08-43934). Computational resources were provided by the National Energy Research Scientific Computing Center, which is supported by the DOE Office of Science under Contract No. DE-AC02-05CH11231. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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N2 - Calcium can be unintentionally incorporated during the growth of semiconductor devices. Using hybrid functional first-principles calculations, we assess the role of Ca impurities in GaN. Ca substituted on the cation site acts as a deep acceptor with a level ~1 eV above the GaN valence-band maximum. We find that for Ca concentrations of 1017 cm−3, the Shockley–Read–Hall recombination coefficient, A, of InGaN exceeds 106 s−1 for band gaps less than 2.5 eV. A values of this magnitude can lead to significant reductions in the efficiency of light-emitting diodes.

AB - Calcium can be unintentionally incorporated during the growth of semiconductor devices. Using hybrid functional first-principles calculations, we assess the role of Ca impurities in GaN. Ca substituted on the cation site acts as a deep acceptor with a level ~1 eV above the GaN valence-band maximum. We find that for Ca concentrations of 1017 cm−3, the Shockley–Read–Hall recombination coefficient, A, of InGaN exceeds 106 s−1 for band gaps less than 2.5 eV. A values of this magnitude can lead to significant reductions in the efficiency of light-emitting diodes.

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JF - Applied Physics Express

IS - 2

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Calcium as a nonradiative recombination center in InGaN

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