Fluorescent impurity emitter in toluene and its photon emission properties

Abstract Single fluorescent emitters like colloidal quantum dots or single molecules are usually prepared in solutions and spin-coated onto cover glasses for studying. Toluene has been a widely used solvent in such studies. Here, we report on a fluorescent impurity emitter contained in toluene and i...

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Autores principales:	Cong Tai Trinh, Jiwon Lee, Kwang-Geol Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/75e56617566241bda0999d5185355036
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spelling	oai:doaj.org-article:75e56617566241bda0999d51853550362021-12-02T11:40:34ZFluorescent impurity emitter in toluene and its photon emission properties10.1038/s41598-018-26686-w2045-2322https://doaj.org/article/75e56617566241bda0999d51853550362018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-26686-whttps://doaj.org/toc/2045-2322Abstract Single fluorescent emitters like colloidal quantum dots or single molecules are usually prepared in solutions and spin-coated onto cover glasses for studying. Toluene has been a widely used solvent in such studies. Here, we report on a fluorescent impurity emitter contained in toluene and its optical properties. The emission spectra of the single emitters show multiple peaks with the main peak varying from 2.03 eV (610 nm) to 2.14 eV (580 nm) and a red-shifted side peak with an average separation of 167 meV from the main peak. The emitted photons show a strong anti-bunching with a fluorescence lifetime of a few nanoseconds. They show very fast blinking behavior which cannot be properly detected by time-trajectory of photoluminescence intensity. An analysis based on the second-order correlation functions reveals that a three-level model can explain our measurements well and that the blinking transition time ranges only a few tens of microseconds. This single emitter in toluene is clearly distinguished from the fluorescent centers in the cover glass by their respective emission spectra. The single emitters in the cover glass also exhibit fast blinking behavior. These background emitters should be carefully identified and distinguished while studying the single fluorescent emitters.Cong Tai TrinhJiwon LeeKwang-Geol LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Cong Tai Trinh Jiwon Lee Kwang-Geol Lee Fluorescent impurity emitter in toluene and its photon emission properties
description	Abstract Single fluorescent emitters like colloidal quantum dots or single molecules are usually prepared in solutions and spin-coated onto cover glasses for studying. Toluene has been a widely used solvent in such studies. Here, we report on a fluorescent impurity emitter contained in toluene and its optical properties. The emission spectra of the single emitters show multiple peaks with the main peak varying from 2.03 eV (610 nm) to 2.14 eV (580 nm) and a red-shifted side peak with an average separation of 167 meV from the main peak. The emitted photons show a strong anti-bunching with a fluorescence lifetime of a few nanoseconds. They show very fast blinking behavior which cannot be properly detected by time-trajectory of photoluminescence intensity. An analysis based on the second-order correlation functions reveals that a three-level model can explain our measurements well and that the blinking transition time ranges only a few tens of microseconds. This single emitter in toluene is clearly distinguished from the fluorescent centers in the cover glass by their respective emission spectra. The single emitters in the cover glass also exhibit fast blinking behavior. These background emitters should be carefully identified and distinguished while studying the single fluorescent emitters.
format	article
author	Cong Tai Trinh Jiwon Lee Kwang-Geol Lee
author_facet	Cong Tai Trinh Jiwon Lee Kwang-Geol Lee
author_sort	Cong Tai Trinh
title	Fluorescent impurity emitter in toluene and its photon emission properties
title_short	Fluorescent impurity emitter in toluene and its photon emission properties
title_full	Fluorescent impurity emitter in toluene and its photon emission properties
title_fullStr	Fluorescent impurity emitter in toluene and its photon emission properties
title_full_unstemmed	Fluorescent impurity emitter in toluene and its photon emission properties
title_sort	fluorescent impurity emitter in toluene and its photon emission properties
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/75e56617566241bda0999d5185355036
work_keys_str_mv	AT congtaitrinh fluorescentimpurityemitterintolueneanditsphotonemissionproperties AT jiwonlee fluorescentimpurityemitterintolueneanditsphotonemissionproperties AT kwanggeollee fluorescentimpurityemitterintolueneanditsphotonemissionproperties
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Fluorescent impurity emitter in toluene and its photon emission properties

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