White light emission based on both upconversion and thermal processes from Nd3+ doped yttrium silicate

Hatun Cinkaya*, Gonul Eryurek, Baldassare Di Bartolo

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Araştırma sonucu: ???type-name???Makalebilirkişi

16 Atıf (Scopus)

Özet

In the present study, white light emission based on both upconversion and thermal processes from single-phase yttrium silicate nanopowder doped with Neodymium (III) (Nd3+) was investigated at both room pressure and vacuum (0.01 mbar) with a diode laser excitation of 808 nm. 1% Nd3+ doped (per mole) yttrium silicate (Y2O3:SiO2) nanopowder was synthesized by using the sol-gel method and annealed at 1250 °C for 12 h to obtain the powder form. Emission for upconverted white light mainly due to the transitions of Nd3+ ions was obtained below ~ 5.79 W of the laser beam power at atmospheric pressure. For powers exceeding ~ 5.79 W, the powder emitted a thermal white light (WL) due to the photon avalanche mechanism together with thermal processes. The threshold power to obtain thermal white light with the transitions of Nd3+ ions was decreased to ~ 3.51 W at the vacuum condition. These processes were investigated in detail by studying the spectral differences of the rise and decay patterns at atmospheric pressure and vacuum conditions.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)3541-3547
Sayfa sayısı7
DergiCeramics International
Hacim44
Basın numarası4
DOI'lar
Yayın durumuYayınlandı - Mar 2018

Bibliyografik not

Publisher Copyright:
© 2017 Elsevier Ltd and Techna Group S.r.l.

Finansman

This study was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) and The Scientific Research Projects Unit (BAP) of Istanbul Technical University with Project no. 38542 .

FinansörlerFinansör numarası
Scientific Research Projects Unit
TUBITAK
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu
Istanbul Teknik Üniversitesi38542

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