Red-emitting LiEuW2O8 phosphor for white emitting diodes prepared by sol–gel process - Lower Silesian Digital Library

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Red-emitting LiEuW2O8 phosphor for white emitting diodes prepared by sol–gel process

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Title: Red-emitting LiEuW2O8 phosphor for white emitting diodes prepared by sol–gel process

Creator:

Hwang, Kyu-Seog ; Jeon, Young-Sun ; Hwangbo, Seung ; Kim, Jin-Tae

Contributor:

Gaj, Miron. Redakcja ; Urbańczyk, Wacław. Redakcja

Description:

Optica Applicata, Vol. 39, 2009, nr 2, s. 375-382

Abstrakt:

Scheelite-type LiEuW2O8 (LEW) phosphors with the optical function of color conversion from near-UV to red were prepared by sol–gel method using a lithium acetate dehydrate, europium(III) nitrate pentahydrate, and tungsten(VI) chloride as starting materials. Viscous mixing sol was prefired at 300 °C for 120 min in air and then white powder precursor was finally annealed at 500–800 °C for 240 min in Ar. From an X-ray diffraction analysis, all the samples are isostructural and belong to the tetragonal system of scheelite-type. The main emission peak is 5D0 → 7F2 transitions of Eu3+ at 615 nm, other transitions from the 5D0 → 7F1, 5D0 → 7F3 and 5D0 → 7F4 located at 570–700 nm range are weak. The characteristic emission of WO4–2 in LEW is quenched absolutely and only red-light emission of Eu3+ appears. Crystallinity, surface properties and red-emission by near-ultraviolet (395 nm) were improved by high-temperature annealing.

Publisher:

Oficyna Wydawnicza Politechniki Wrocławskiej

Place of publication:

Date:

Resource Type:

Resource Identifier:

oai:dbc.wroc.pl:59060

Source:

<sygn. PWr A3481II> ; click here to follow the link ; click here to follow the link

Language:

Relation:

Optica Applicata ; Optica Applicata, Vol. 39, 2009 ; Optica Applicata, Vol. 39, 2009, nr 2 ; Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki

Rights:

Wszystkie prawa zastrzeżone (Copyright)

Access Rights:

Dla wszystkich w zakresie dozwolonego użytku

Location:

Politechnika Wrocławska

Group publication title:

Optica Applicata

Subject and keywords:

optyka phosphors sol–gel near-UV red-light emission

Object collections:

Last modified:

Feb 7, 2019

In our library since:

Feb 7, 2019

Number of object content hits:

57

All available object's versions:

https://dbc.wroc.pl/publication/100291

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Optica Applicata

Edition name	Date
Red-emitting LiEuW2O8 phosphor for white emitting diodes prepared by sol–gel process	Feb 7, 2019

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