Intermixing studies in GaN1−xSbx highly mismatched alloys

Wendy L. Sarney, Stefan P. Svensson, Min Ting, Natalie Segercrantz, Wladek Walukiewicz, Kin Man Yu, Robert W. Martin, Sergei V. Novikov, C.T. Thomas Foxon

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

GaN1−xSbx with x~ 5-7% is a highly mismatched alloy predicted to have favorable properties for application as an electrode in a photo-electrochemical cell for solar water splitting. In this study, we grew GaN1−xSbx under conditions intended to induce phase segregation. Prior experiments with the similar alloy GaN1−xAsx, the tendency of Sb to surfact, and the low growth temperatures needed to incorporate Sb, all suggested that GaN1−xSbx alloys would likely exhibit phase segregation. We found that, except for very high Sb compositions, this was not the case, and that instead interdiffusion dominated. Characteristics measured by optical absorption were similar to intentionally grown bulk alloys for the same composition. Furthermore, the alloys produced by this method maintained crystallinity for very high Sb compositions, and allowed higher overall Sb compositions. This method may allow higher temperature growth while still achieving needed Sb compositions for solar water splitting applications.
LanguageEnglish
PagesB64-B69
Number of pages6
JournalApplied Optics
Volume56
Issue number3
DOIs
Publication statusPublished - 20 Jan 2017

Fingerprint

water splitting
electrochemical cells
crystallinity
tendencies
optical absorption
electrodes
temperature

Keywords

  • semiconductor materials
  • optoelectronics
  • thin films

Cite this

Sarney, W. L., Svensson, S. P., Ting, M., Segercrantz, N., Walukiewicz, W., Yu, K. M., ... Foxon, C. T. T. (2017). Intermixing studies in GaN1−xSbx highly mismatched alloys. Applied Optics, 56(3), B64-B69. https://doi.org/10.1364/AO.56.000B64
Sarney, Wendy L. ; Svensson, Stefan P. ; Ting, Min ; Segercrantz, Natalie ; Walukiewicz, Wladek ; Yu, Kin Man ; Martin, Robert W. ; Novikov, Sergei V. ; Foxon, C.T. Thomas. / Intermixing studies in GaN1−xSbx highly mismatched alloys. In: Applied Optics. 2017 ; Vol. 56, No. 3. pp. B64-B69.
@article{c51a05aa94784de4abb4693ef60241aa,
title = "Intermixing studies in GaN1−xSbx highly mismatched alloys",
abstract = "GaN1−xSbx with x~ 5-7{\%} is a highly mismatched alloy predicted to have favorable properties for application as an electrode in a photo-electrochemical cell for solar water splitting. In this study, we grew GaN1−xSbx under conditions intended to induce phase segregation. Prior experiments with the similar alloy GaN1−xAsx, the tendency of Sb to surfact, and the low growth temperatures needed to incorporate Sb, all suggested that GaN1−xSbx alloys would likely exhibit phase segregation. We found that, except for very high Sb compositions, this was not the case, and that instead interdiffusion dominated. Characteristics measured by optical absorption were similar to intentionally grown bulk alloys for the same composition. Furthermore, the alloys produced by this method maintained crystallinity for very high Sb compositions, and allowed higher overall Sb compositions. This method may allow higher temperature growth while still achieving needed Sb compositions for solar water splitting applications.",
keywords = "semiconductor materials, optoelectronics, thin films",
author = "Sarney, {Wendy L.} and Svensson, {Stefan P.} and Min Ting and Natalie Segercrantz and Wladek Walukiewicz and Yu, {Kin Man} and Martin, {Robert W.} and Novikov, {Sergei V.} and Foxon, {C.T. Thomas}",
note = "{\circledC} 2016 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.",
year = "2017",
month = "1",
day = "20",
doi = "10.1364/AO.56.000B64",
language = "English",
volume = "56",
pages = "B64--B69",
journal = "Applied Optics",
issn = "1559-128X",
publisher = "Optical Society of America",
number = "3",

}

Sarney, WL, Svensson, SP, Ting, M, Segercrantz, N, Walukiewicz, W, Yu, KM, Martin, RW, Novikov, SV & Foxon, CTT 2017, 'Intermixing studies in GaN1−xSbx highly mismatched alloys' Applied Optics, vol. 56, no. 3, pp. B64-B69. https://doi.org/10.1364/AO.56.000B64

Intermixing studies in GaN1−xSbx highly mismatched alloys. / Sarney, Wendy L.; Svensson, Stefan P.; Ting, Min; Segercrantz, Natalie; Walukiewicz, Wladek; Yu, Kin Man; Martin, Robert W.; Novikov, Sergei V.; Foxon, C.T. Thomas.

In: Applied Optics, Vol. 56, No. 3, 20.01.2017, p. B64-B69.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Intermixing studies in GaN1−xSbx highly mismatched alloys

AU - Sarney, Wendy L.

AU - Svensson, Stefan P.

AU - Ting, Min

AU - Segercrantz, Natalie

AU - Walukiewicz, Wladek

AU - Yu, Kin Man

AU - Martin, Robert W.

AU - Novikov, Sergei V.

AU - Foxon, C.T. Thomas

N1 - © 2016 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.

PY - 2017/1/20

Y1 - 2017/1/20

N2 - GaN1−xSbx with x~ 5-7% is a highly mismatched alloy predicted to have favorable properties for application as an electrode in a photo-electrochemical cell for solar water splitting. In this study, we grew GaN1−xSbx under conditions intended to induce phase segregation. Prior experiments with the similar alloy GaN1−xAsx, the tendency of Sb to surfact, and the low growth temperatures needed to incorporate Sb, all suggested that GaN1−xSbx alloys would likely exhibit phase segregation. We found that, except for very high Sb compositions, this was not the case, and that instead interdiffusion dominated. Characteristics measured by optical absorption were similar to intentionally grown bulk alloys for the same composition. Furthermore, the alloys produced by this method maintained crystallinity for very high Sb compositions, and allowed higher overall Sb compositions. This method may allow higher temperature growth while still achieving needed Sb compositions for solar water splitting applications.

AB - GaN1−xSbx with x~ 5-7% is a highly mismatched alloy predicted to have favorable properties for application as an electrode in a photo-electrochemical cell for solar water splitting. In this study, we grew GaN1−xSbx under conditions intended to induce phase segregation. Prior experiments with the similar alloy GaN1−xAsx, the tendency of Sb to surfact, and the low growth temperatures needed to incorporate Sb, all suggested that GaN1−xSbx alloys would likely exhibit phase segregation. We found that, except for very high Sb compositions, this was not the case, and that instead interdiffusion dominated. Characteristics measured by optical absorption were similar to intentionally grown bulk alloys for the same composition. Furthermore, the alloys produced by this method maintained crystallinity for very high Sb compositions, and allowed higher overall Sb compositions. This method may allow higher temperature growth while still achieving needed Sb compositions for solar water splitting applications.

KW - semiconductor materials

KW - optoelectronics

KW - thin films

UR - https://www.osapublishing.org/ao/home.cfm

U2 - 10.1364/AO.56.000B64

DO - 10.1364/AO.56.000B64

M3 - Article

VL - 56

SP - B64-B69

JO - Applied Optics

T2 - Applied Optics

JF - Applied Optics

SN - 1559-128X

IS - 3

ER -

Sarney WL, Svensson SP, Ting M, Segercrantz N, Walukiewicz W, Yu KM et al. Intermixing studies in GaN1−xSbx highly mismatched alloys. Applied Optics. 2017 Jan 20;56(3):B64-B69. https://doi.org/10.1364/AO.56.000B64