Low temperature cathodoluminescence study of Fe-doped β-Ga2O3

Ibrahim Hany; Ge Yang; Chuanzhen Elaine Zhou; Cheng Sun; Kenan Gundogdu; Dovletgeldi Seyitliyev; Evgeny O. Danilov; Felix N. Castellano; Dali Sun; Eric Vetter

doi:10.1016/j.matlet.2019.126744

Low temperature cathodoluminescence study of Fe-doped β-Ga₂O₃

Ibrahim Hany
, Ge Yang
, Chuanzhen Elaine Zhou
, Cheng Sun
, Kenan Gundogdu
, Dovletgeldi Seyitliyev
, Evgeny O. Danilov
, Felix N. Castellano
, Dali Sun
, Eric Vetter

Materials and Fuels Complex

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

22 Scopus citations

Abstract

Optical and electrical properties along the b-axis of Fe-doped β-Ga₂O₃ were studied using low temperature cathodoluminescence (CL) spectroscopy, optical absorption spectroscopy and current-voltage (IV) measurements. The optical absorption spectroscopy showed an absorption edge without near edge shoulder and the corresponding optical bandgap was calculated to be 4.45 eV using direct band gap treatment. The temperature dependent CL measurements exhibited a strong blue to ultraviolet (UV) band composed of multiple low intensity peaks in the blue range, a main blue peak, a main UV peak, and a weak UV band from the as-grown Fe-doped β-Ga₂O₃. After a controlled annealing in air, the emissions changed to a red to near infrared (R-NIR) band with two sharp peaks and an UV band that is resolved at room temperature to three UV broad peaks. The R-NIR sharp peaks from the air-annealed sample were ascribed to incorporation of nitrogen during air annealing.

Original language	English
Article number	126744
Journal	Materials Letters
Volume	257
Early online date	Sep 26 2019
DOIs	https://doi.org/10.1016/j.matlet.2019.126744
State	Published - Dec 15 2019

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@article{fc0a9935cae146c5bf5d8fd1774b0445,

title = "Low temperature cathodoluminescence study of Fe-doped β-Ga2O3",

abstract = "Optical and electrical properties along the b-axis of Fe-doped β-Ga2O3 were studied using low temperature cathodoluminescence (CL) spectroscopy, optical absorption spectroscopy and current-voltage (IV) measurements. The optical absorption spectroscopy showed an absorption edge without near edge shoulder and the corresponding optical bandgap was calculated to be 4.45 eV using direct band gap treatment. The temperature dependent CL measurements exhibited a strong blue to ultraviolet (UV) band composed of multiple low intensity peaks in the blue range, a main blue peak, a main UV peak, and a weak UV band from the as-grown Fe-doped β-Ga2O3. After a controlled annealing in air, the emissions changed to a red to near infrared (R-NIR) band with two sharp peaks and an UV band that is resolved at room temperature to three UV broad peaks. The R-NIR sharp peaks from the air-annealed sample were ascribed to incorporation of nitrogen during air annealing.",

author = "Ibrahim Hany and Ge Yang and Zhou, \{Chuanzhen Elaine\} and Cheng Sun and Kenan Gundogdu and Dovletgeldi Seyitliyev and Danilov, \{Evgeny O.\} and Castellano, \{Felix N.\} and Dali Sun and Eric Vetter",

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year = "2019",

month = dec,

day = "15",

doi = "10.1016/j.matlet.2019.126744",

language = "English",

volume = "257",

journal = "Materials Letters",

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TY - JOUR

T1 - Low temperature cathodoluminescence study of Fe-doped β-Ga2O3

AU - Hany, Ibrahim

AU - Yang, Ge

AU - Zhou, Chuanzhen Elaine

AU - Sun, Cheng

AU - Gundogdu, Kenan

AU - Seyitliyev, Dovletgeldi

AU - Danilov, Evgeny O.

AU - Castellano, Felix N.

AU - Sun, Dali

AU - Vetter, Eric

PY - 2019/12/15

Y1 - 2019/12/15

N2 - Optical and electrical properties along the b-axis of Fe-doped β-Ga2O3 were studied using low temperature cathodoluminescence (CL) spectroscopy, optical absorption spectroscopy and current-voltage (IV) measurements. The optical absorption spectroscopy showed an absorption edge without near edge shoulder and the corresponding optical bandgap was calculated to be 4.45 eV using direct band gap treatment. The temperature dependent CL measurements exhibited a strong blue to ultraviolet (UV) band composed of multiple low intensity peaks in the blue range, a main blue peak, a main UV peak, and a weak UV band from the as-grown Fe-doped β-Ga2O3. After a controlled annealing in air, the emissions changed to a red to near infrared (R-NIR) band with two sharp peaks and an UV band that is resolved at room temperature to three UV broad peaks. The R-NIR sharp peaks from the air-annealed sample were ascribed to incorporation of nitrogen during air annealing.

AB - Optical and electrical properties along the b-axis of Fe-doped β-Ga2O3 were studied using low temperature cathodoluminescence (CL) spectroscopy, optical absorption spectroscopy and current-voltage (IV) measurements. The optical absorption spectroscopy showed an absorption edge without near edge shoulder and the corresponding optical bandgap was calculated to be 4.45 eV using direct band gap treatment. The temperature dependent CL measurements exhibited a strong blue to ultraviolet (UV) band composed of multiple low intensity peaks in the blue range, a main blue peak, a main UV peak, and a weak UV band from the as-grown Fe-doped β-Ga2O3. After a controlled annealing in air, the emissions changed to a red to near infrared (R-NIR) band with two sharp peaks and an UV band that is resolved at room temperature to three UV broad peaks. The R-NIR sharp peaks from the air-annealed sample were ascribed to incorporation of nitrogen during air annealing.

UR - https://www.scopus.com/pages/publications/85072796965

UR - https://www.mendeley.com/catalogue/f7846cde-7f6c-3b04-a310-d94fdb3d7926/

U2 - 10.1016/j.matlet.2019.126744

DO - 10.1016/j.matlet.2019.126744

M3 - Article

AN - SCOPUS:85072796965

SN - 0167-577X

VL - 257

JO - Materials Letters

JF - Materials Letters

M1 - 126744

ER -

Low temperature cathodoluminescence study of Fe-doped β-Ga₂O₃

Abstract

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