Near white light and near-infrared luminescence in perovskite Ga:LaCrO3

T. R. Rajalekshmi; Vikash Mishra; Tejendra Dixit; Muralidhar Miryala; M. S.Ramachandra Rao; K. Sethupathi

doi:10.1016/j.scriptamat.2021.114449

Near white light and near-infrared luminescence in perovskite Ga:LaCrO₃

T. R. Rajalekshmi
, Vikash Mishra
, Tejendra Dixit
, Muralidhar Miryala
, M. S.Ramachandra Rao^*
, K. Sethupathi

^*Corresponding author for this work

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

11 Citations (Scopus)

Abstract

We report the realization of near-white light emission (near-WLE) and the selective tuning to the near-infrared (NIR) luminescence from Ga substituted lanthanum chromite perovskite with electron-beam excitation for the first time. The near-WLE in Cathodoluminescence (CL), arises from the combination of ⁴T₁(F)→⁴A₂(blue), ⁴T₁(P)→⁴A₂(green) and ⁴T₂→⁴A₂(red) spin allowed transitions and ²E→⁴A₂ spin forbidden transitions from the Cr³⁺ ion. The spin allowed transitions from the Cr³⁺ ions is rare, however can be accomplished by adjusting the Cr³⁺/Ga³⁺ ion concentration in the host lattice. The NIR emission originates from the selective ²E→⁴A₂ transition, which increases with the increasing concentration of Ga³⁺ions. Moreover, the Density Functional Theory (DFT) calculations point out the presence of extra electronic states in the NIR region with Ga substitution, which elucidates the observation of NIR emission in Ga substituted samples.

Original language	English
Article number	114449
Journal	Scripta Materialia
Volume	210
DOIs	https://doi.org/10.1016/j.scriptamat.2021.114449
Publication status	Published - 15-03-2022

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2021.114449

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title = "Near white light and near-infrared luminescence in perovskite Ga:LaCrO3",

abstract = "We report the realization of near-white light emission (near-WLE) and the selective tuning to the near-infrared (NIR) luminescence from Ga substituted lanthanum chromite perovskite with electron-beam excitation for the first time. The near-WLE in Cathodoluminescence (CL), arises from the combination of 4T1(F)→4A2(blue), 4T1(P)→4A2(green) and 4T2→4A2(red) spin allowed transitions and 2E→4A2 spin forbidden transitions from the Cr3+ ion. The spin allowed transitions from the Cr3+ ions is rare, however can be accomplished by adjusting the Cr3+/Ga3+ ion concentration in the host lattice. The NIR emission originates from the selective 2E→4A2 transition, which increases with the increasing concentration of Ga3+ions. Moreover, the Density Functional Theory (DFT) calculations point out the presence of extra electronic states in the NIR region with Ga substitution, which elucidates the observation of NIR emission in Ga substituted samples.",

author = "Rajalekshmi, \{T. R.\} and Vikash Mishra and Tejendra Dixit and Muralidhar Miryala and Rao, \{M. S.Ramachandra\} and K. Sethupathi",

note = "Publisher Copyright: {\textcopyright} 2021 Acta Materialia Inc.",

year = "2022",

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doi = "10.1016/j.scriptamat.2021.114449",

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T1 - Near white light and near-infrared luminescence in perovskite Ga:LaCrO3

AU - Rajalekshmi, T. R.

AU - Mishra, Vikash

AU - Dixit, Tejendra

AU - Miryala, Muralidhar

AU - Rao, M. S.Ramachandra

AU - Sethupathi, K.

PY - 2022/3/15

Y1 - 2022/3/15

N2 - We report the realization of near-white light emission (near-WLE) and the selective tuning to the near-infrared (NIR) luminescence from Ga substituted lanthanum chromite perovskite with electron-beam excitation for the first time. The near-WLE in Cathodoluminescence (CL), arises from the combination of 4T1(F)→4A2(blue), 4T1(P)→4A2(green) and 4T2→4A2(red) spin allowed transitions and 2E→4A2 spin forbidden transitions from the Cr3+ ion. The spin allowed transitions from the Cr3+ ions is rare, however can be accomplished by adjusting the Cr3+/Ga3+ ion concentration in the host lattice. The NIR emission originates from the selective 2E→4A2 transition, which increases with the increasing concentration of Ga3+ions. Moreover, the Density Functional Theory (DFT) calculations point out the presence of extra electronic states in the NIR region with Ga substitution, which elucidates the observation of NIR emission in Ga substituted samples.

AB - We report the realization of near-white light emission (near-WLE) and the selective tuning to the near-infrared (NIR) luminescence from Ga substituted lanthanum chromite perovskite with electron-beam excitation for the first time. The near-WLE in Cathodoluminescence (CL), arises from the combination of 4T1(F)→4A2(blue), 4T1(P)→4A2(green) and 4T2→4A2(red) spin allowed transitions and 2E→4A2 spin forbidden transitions from the Cr3+ ion. The spin allowed transitions from the Cr3+ ions is rare, however can be accomplished by adjusting the Cr3+/Ga3+ ion concentration in the host lattice. The NIR emission originates from the selective 2E→4A2 transition, which increases with the increasing concentration of Ga3+ions. Moreover, the Density Functional Theory (DFT) calculations point out the presence of extra electronic states in the NIR region with Ga substitution, which elucidates the observation of NIR emission in Ga substituted samples.

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DO - 10.1016/j.scriptamat.2021.114449

M3 - Article

AN - SCOPUS:85121143271

SN - 1359-6462

VL - 210

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 114449

ER -

Near white light and near-infrared luminescence in perovskite Ga:LaCrO₃

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