Influence of air annealing on the luminescence dynamics of HPHT nanodiamonds

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00470965" target="_blank" >RIV/68378271:_____/16:00470965 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/16:10330440 RIV/68407700:21230/16:00302983

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.diamond.2016.06.001" target="_blank" >http://dx.doi.org/10.1016/j.diamond.2016.06.001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.diamond.2016.06.001" target="_blank" >10.1016/j.diamond.2016.06.001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of air annealing on the luminescence dynamics of HPHT nanodiamonds

Popis výsledku v původním jazyce

We present a study of the influence of air-annealing on the photoexcited charge carriers dynamics on the surface of nanodiamonds of sub-10 nm size. Samples were produced by high temperature annealing of high-pressure, high-temperature nanodiamonds. Measured photoluminescence spectra of annealed nanodiamonds show distinct blue shift and spectral narrowing compared to non-annealed reference. Time-resolved measurements revealed a change in relaxation process in the nanodiamond surface layer due to removal of non-diamond carbon phase on the surface. Spectro-temporal evolution takes place during the first 50 ps after photoexcitation suggesting that non-radiative states play a major role in the charge carrier relaxation. The acceleration of high energy states depopulation, observed for the annealed nanodiamonds, suggests gradual inhibition of non-radiative recombination channels (originally present in large numbers in non-annealed sample), which is in a good agreement with the picture of reduction of non-diamond carbon phase.

Název v anglickém jazyce

Influence of air annealing on the luminescence dynamics of HPHT nanodiamonds

Popis výsledku anglicky

We present a study of the influence of air-annealing on the photoexcited charge carriers dynamics on the surface of nanodiamonds of sub-10 nm size. Samples were produced by high temperature annealing of high-pressure, high-temperature nanodiamonds. Measured photoluminescence spectra of annealed nanodiamonds show distinct blue shift and spectral narrowing compared to non-annealed reference. Time-resolved measurements revealed a change in relaxation process in the nanodiamond surface layer due to removal of non-diamond carbon phase on the surface. Spectro-temporal evolution takes place during the first 50 ps after photoexcitation suggesting that non-radiative states play a major role in the charge carrier relaxation. The acceleration of high energy states depopulation, observed for the annealed nanodiamonds, suggests gradual inhibition of non-radiative recombination channels (originally present in large numbers in non-annealed sample), which is in a good agreement with the picture of reduction of non-diamond carbon phase.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Diamond and Related Materials

ISSN

0925-9635

e-ISSN

—

Svazek periodika

68

Číslo periodika v rámci svazku

Sep

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

4

Strana od-do

62-65

Kód UT WoS článku

000383523900009

EID výsledku v databázi Scopus

2-s2.0-84975063316