Publication detail

Near-field investigation of ZnS:Mn nanocrystal phosphors in thin-film electroluminescent device

GRMELA, L. TOMÁNEK, P.

Original Title

Near-field investigation of ZnS:Mn nanocrystal phosphors in thin-film electroluminescent device

Czech Title

Výzkum tenkovrstvých luminoforů s ZnS:Mn nanokrystaly vpomocí metody blízkého pole

English Title

Near-field investigation of ZnS:Mn nanocrystal phosphors in thin-film electroluminescent device

Type

conference paper

Language

en

Original Abstract

A study of the luminescence characteristics of nanostructured ZnS:Mn ACTFEL devices is presented. Nanocrystal ZnS:Mn phosphor has been prepared by sol method using inorganic materials at room temperature. The nanocrystal of ZnS:Mn has cubic crystal structure with average 3 nm of particle size, emitting bright orange light at peak wavelength 585-595 nm with the full width of half maximum 90 nm under UV 337 nm excitation, and the brightness as high as the corresponding bulk pure cubic ZnS:Mn phosphor. In comparison with the bulk ZnS:Mn phosphor these nanocrystals have clearly high luminescent efficiency with its luminescent decay time at least 5 orders of magnitude faster. It means that the oscillator intensity of luminescent centers in ZnS:Mn nanocrystal enhances at least 5 orders of magnitude than that in corresponding bulk ZnS:Mn. The local measurement of this luminescent efficiency by Scanning near-field optical microscope allows discover a hot luminescence in these nanocrystals.

Czech abstract

Článek přináší studii luminiscenčních vlastností nanostrukturovaných ZnS:Mn ACTFEL. Jsou specifikovány rozměry nanokrystalů, který po ozáření UV světlem 337 nm vyzařuje maximum v oblasti 585-595 nm. Tyto nanokrystaly vykazují podstatně vyšší světelnou účinnost než objemový materiál. Lokální měření luminiscenční účinnosti pomocí SNOM umožní lokalizovat místa horké luminiscence v těchto krystalech.

English abstract

A study of the luminescence characteristics of nanostructured ZnS:Mn ACTFEL devices is presented. Nanocrystal ZnS:Mn phosphor has been prepared by sol method using inorganic materials at room temperature. The nanocrystal of ZnS:Mn has cubic crystal structure with average 3 nm of particle size, emitting bright orange light at peak wavelength 585-595 nm with the full width of half maximum 90 nm under UV 337 nm excitation, and the brightness as high as the corresponding bulk pure cubic ZnS:Mn phosphor. In comparison with the bulk ZnS:Mn phosphor these nanocrystals have clearly high luminescent efficiency with its luminescent decay time at least 5 orders of magnitude faster. It means that the oscillator intensity of luminescent centers in ZnS:Mn nanocrystal enhances at least 5 orders of magnitude than that in corresponding bulk ZnS:Mn. The local measurement of this luminescent efficiency by Scanning near-field optical microscope allows discover a hot luminescence in these nanocrystals.

Keywords

nanocrystal phosphors, ZnS:Mn, hot luminescence, ACTFEL, Scanning near-field optical microscopy

RIV year

2007

Released

21.01.2007

Publisher

ČSNMT Praha

Location

Brno

ISBN

80-214-3331-0

Book

Nano´06

Pages from

307

Pages to

310

Pages count

4

BibTex


@inproceedings{BUT24903,
  author="Lubomír {Grmela} and Pavel {Tománek}",
  title="Near-field investigation of ZnS:Mn nanocrystal phosphors in thin-film electroluminescent device",
  annote="A study of the luminescence characteristics of nanostructured ZnS:Mn ACTFEL devices is presented. Nanocrystal ZnS:Mn phosphor has been prepared by sol method using inorganic materials at room temperature. The nanocrystal of ZnS:Mn has cubic crystal structure with average 3 nm of particle size, emitting bright orange light at peak wavelength 585-595 nm with the full width of half maximum 90 nm under UV 337 nm excitation, and the brightness as high as the corresponding bulk pure cubic ZnS:Mn phosphor. In comparison with the bulk ZnS:Mn phosphor these nanocrystals have clearly high luminescent efficiency with its luminescent decay time at least 5 orders of magnitude faster. It means that the oscillator intensity of luminescent centers in ZnS:Mn nanocrystal enhances at least 5 orders of magnitude than that in corresponding bulk ZnS:Mn. The local measurement of this luminescent efficiency by Scanning near-field optical microscope allows discover a hot luminescence in these nanocrystals.",
  address="ČSNMT Praha",
  booktitle="Nano´06",
  chapter="24903",
  institution="ČSNMT Praha",
  year="2007",
  month="january",
  pages="307--310",
  publisher="ČSNMT Praha",
  type="conference paper"
}