Details der Publikation - Enhancement of red emission assigned to inversion defects in $ ZnAl_{2} $$ O

Enhancement of red emission assigned to inversion defects in $ ZnAl_{2} $$ O_{4} $:$ Cr^{3+} $ hollow spheres

Abstract $ ZnAl_{2} $$ O_{4} $:$ Cr^{3+} $ hollow spheres composed of secondary nanoparticles with single spinel phase were fabricated using carbon templets. Monitoring the emission of 687 nm, two wide excitation bands attributed to the electrons of $ Cr^{3+} $ transiting from 4$ A_{2g} $ (4F) → 4$ T_{1g} $ (4F) and 4$ A_{2g} $ (4F) → 4$ T_{2g} $ (4F) were observed. The broad excitation band at about 397 nm was asymmetric and consisted of two peaks, indicating that there was a trigonal distortion existing in the lattices. The intensity of all emitting peaks revealed sharp increasing trend with the sintering temperature increase, and the intensity of emission at 698 nm assigned to inversion defects was more intense than that of emission at 687 nm assigned to octahedral $ Cr^{3+} $ ions in the undistorted spinel lattice. The samples with higher synthesized temperature revealed longer decay time, and the relative weightage of shorter decay time component decreased with the increase of sintering temperature, indicating that the surface defects decreased..

Medienart:	E-Artikel

Erscheinungsjahr:	2019
Erschienen:	2019

Enthalten in:	Zur Gesamtaufnahme - volume:14
Enthalten in:	Frontiers of materials science - 14(2019), 1 vom: 27. Dez., Seite 73-80

Sprache:	Englisch

Beteiligte Personen:	Zhang, Dong [VerfasserIn] Chen, Jingxin [VerfasserIn] Du, Chunyu [VerfasserIn] Zhu, Bingjun [VerfasserIn] Wang, Qingru [VerfasserIn] Shi, Qiang [VerfasserIn] Cui, Shouxin [VerfasserIn] Wang, Wenjun [VerfasserIn]

Links:	Volltext [lizenzpflichtig]

Themen:	Hollow sphere Inversion defects Photoluminescence Semiconductors

Anmerkungen:	© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020

doi:	10.1007/s11706-020-0487-7

funding:
Förderinstitution / Projekttitel:

PPN (Katalog-ID):	OLC2116904366

Internformat


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520			\|a Abstract $ ZnAl_{2} $$ O_{4} $:$ Cr^{3+} $ hollow spheres composed of secondary nanoparticles with single spinel phase were fabricated using carbon templets. Monitoring the emission of 687 nm, two wide excitation bands attributed to the electrons of $ Cr^{3+} $ transiting from 4$ A_{2g} $ (4F) → 4$ T_{1g} $ (4F) and 4$ A_{2g} $ (4F) → 4$ T_{2g} $ (4F) were observed. The broad excitation band at about 397 nm was asymmetric and consisted of two peaks, indicating that there was a trigonal distortion existing in the lattices. The intensity of all emitting peaks revealed sharp increasing trend with the sintering temperature increase, and the intensity of emission at 698 nm assigned to inversion defects was more intense than that of emission at 687 nm assigned to octahedral $ Cr^{3+} $ ions in the undistorted spinel lattice. The samples with higher synthesized temperature revealed longer decay time, and the relative weightage of shorter decay time component decreased with the increase of sintering temperature, indicating that the surface defects decreased.
650		4	\|a semiconductors
650		4	\|a hollow sphere
650		4	\|a inversion defects
650		4	\|a photoluminescence
700	1		\|a Chen, Jingxin \|4 aut
700	1		\|a Du, Chunyu \|4 aut
700	1		\|a Zhu, Bingjun \|4 aut
700	1		\|a Wang, Qingru \|4 aut
700	1		\|a Shi, Qiang \|4 aut
700	1		\|a Cui, Shouxin \|4 aut
700	1		\|a Wang, Wenjun \|4 aut
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Enhancement of red emission assigned to inversion defects in $ ZnAl_{2} $$ O_{4} $:$ Cr^{3+} $ hollow spheres

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