Electronic energy dynamics of photoexcited ternary Zintl phase LiSbTe2 and the distance estimation between trap sites

Seung Gu Kang, Weon Sik Chae, Yong Rok Kim, Jin Seung Jung, Sung Han Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

For newly synthesized ternary Zintl phase LiSbTe2, absorption, fluorescence, and excitation spectra indicate that it has an E(g) of 4.46 eV, and there is an absorption band around 300 nm below the band gap and a Stokes-shifted fluorescence band around 390 nm. At both room temperature and 77 K, power dependent steady-state and time-resolved fluorescence studies result in the appearance of another fluorescence band at about 450 and 520 nm. As the photon power increases, the 390 nm band is blue shifted at the saturation stage with the saturation of the 520 nm band as well. Along with fluorescence lifetime data, the results imply that the 390 and 450 nm bands correspond to shallow trapped exciton state and deep self-trapped exciton state originating from lattice distortion, respectively, and the 520 nm band is from the surface trap state coupled to the frozen solvent environment. The upper limit distance between the trap sites corresponding to 390 nm band is estimated to be about 17.6 nm by the dielectric function calculation of the gas phase model. (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)295-305
Number of pages11
JournalChemical Physics
Volume256
Issue number3
DOIs
Publication statusPublished - 2000 Jun 15

Fingerprint

Fluorescence
traps
electronics
fluorescence
energy
excitons
Absorption spectra
absorption spectra
saturation
Energy gap
Photons
Gases
vapor phases
life (durability)
photons
room temperature
Temperature
LDS 751
excitation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Kang, Seung Gu ; Chae, Weon Sik ; Kim, Yong Rok ; Jung, Jin Seung ; Lee, Sung Han. / Electronic energy dynamics of photoexcited ternary Zintl phase LiSbTe2 and the distance estimation between trap sites. In: Chemical Physics. 2000 ; Vol. 256, No. 3. pp. 295-305.
@article{41b58797c42941bb80b14160e032700d,
title = "Electronic energy dynamics of photoexcited ternary Zintl phase LiSbTe2 and the distance estimation between trap sites",
abstract = "For newly synthesized ternary Zintl phase LiSbTe2, absorption, fluorescence, and excitation spectra indicate that it has an E(g) of 4.46 eV, and there is an absorption band around 300 nm below the band gap and a Stokes-shifted fluorescence band around 390 nm. At both room temperature and 77 K, power dependent steady-state and time-resolved fluorescence studies result in the appearance of another fluorescence band at about 450 and 520 nm. As the photon power increases, the 390 nm band is blue shifted at the saturation stage with the saturation of the 520 nm band as well. Along with fluorescence lifetime data, the results imply that the 390 and 450 nm bands correspond to shallow trapped exciton state and deep self-trapped exciton state originating from lattice distortion, respectively, and the 520 nm band is from the surface trap state coupled to the frozen solvent environment. The upper limit distance between the trap sites corresponding to 390 nm band is estimated to be about 17.6 nm by the dielectric function calculation of the gas phase model. (C) 2000 Elsevier Science B.V.",
author = "Kang, {Seung Gu} and Chae, {Weon Sik} and Kim, {Yong Rok} and Jung, {Jin Seung} and Lee, {Sung Han}",
year = "2000",
month = "6",
day = "15",
doi = "10.1016/S0301-0104(00)00116-6",
language = "English",
volume = "256",
pages = "295--305",
journal = "Chemical Physics",
issn = "0301-0104",
publisher = "Elsevier",
number = "3",

}

Electronic energy dynamics of photoexcited ternary Zintl phase LiSbTe2 and the distance estimation between trap sites. / Kang, Seung Gu; Chae, Weon Sik; Kim, Yong Rok; Jung, Jin Seung; Lee, Sung Han.

In: Chemical Physics, Vol. 256, No. 3, 15.06.2000, p. 295-305.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electronic energy dynamics of photoexcited ternary Zintl phase LiSbTe2 and the distance estimation between trap sites

AU - Kang, Seung Gu

AU - Chae, Weon Sik

AU - Kim, Yong Rok

AU - Jung, Jin Seung

AU - Lee, Sung Han

PY - 2000/6/15

Y1 - 2000/6/15

N2 - For newly synthesized ternary Zintl phase LiSbTe2, absorption, fluorescence, and excitation spectra indicate that it has an E(g) of 4.46 eV, and there is an absorption band around 300 nm below the band gap and a Stokes-shifted fluorescence band around 390 nm. At both room temperature and 77 K, power dependent steady-state and time-resolved fluorescence studies result in the appearance of another fluorescence band at about 450 and 520 nm. As the photon power increases, the 390 nm band is blue shifted at the saturation stage with the saturation of the 520 nm band as well. Along with fluorescence lifetime data, the results imply that the 390 and 450 nm bands correspond to shallow trapped exciton state and deep self-trapped exciton state originating from lattice distortion, respectively, and the 520 nm band is from the surface trap state coupled to the frozen solvent environment. The upper limit distance between the trap sites corresponding to 390 nm band is estimated to be about 17.6 nm by the dielectric function calculation of the gas phase model. (C) 2000 Elsevier Science B.V.

AB - For newly synthesized ternary Zintl phase LiSbTe2, absorption, fluorescence, and excitation spectra indicate that it has an E(g) of 4.46 eV, and there is an absorption band around 300 nm below the band gap and a Stokes-shifted fluorescence band around 390 nm. At both room temperature and 77 K, power dependent steady-state and time-resolved fluorescence studies result in the appearance of another fluorescence band at about 450 and 520 nm. As the photon power increases, the 390 nm band is blue shifted at the saturation stage with the saturation of the 520 nm band as well. Along with fluorescence lifetime data, the results imply that the 390 and 450 nm bands correspond to shallow trapped exciton state and deep self-trapped exciton state originating from lattice distortion, respectively, and the 520 nm band is from the surface trap state coupled to the frozen solvent environment. The upper limit distance between the trap sites corresponding to 390 nm band is estimated to be about 17.6 nm by the dielectric function calculation of the gas phase model. (C) 2000 Elsevier Science B.V.

UR - http://www.scopus.com/inward/record.url?scp=0034659098&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034659098&partnerID=8YFLogxK

U2 - 10.1016/S0301-0104(00)00116-6

DO - 10.1016/S0301-0104(00)00116-6

M3 - Article

AN - SCOPUS:0034659098

VL - 256

SP - 295

EP - 305

JO - Chemical Physics

JF - Chemical Physics

SN - 0301-0104

IS - 3

ER -