Investigation on relaxation dynamics of photoexcitations and spectral narrowing of photoluminescence in PPV films

Sac Chae Jeoung; Yong Hee Kim; Dongho Kim; Ja Young Han; Min Sik Jang; Hong Ku Shim

doi:10.1016/S0379-6779(98)00994-1

Investigation on relaxation dynamics of photoexcitations and spectral narrowing of photoluminescence in PPV films

Sac Chae Jeoung, Yong Hee Kim, Dongho Kim, Ja Young Han, Min Sik Jang, Hong Ku Shim

Department of Chemistry

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

Photoinduced absorption spectral feature as well as their temporal profiles on PPV thin film in femtosecond time regime exhibit a strong pump power density dependence. The increase in pump power density also results in the spectrally narrowed emission (SNE) band superimposed to the well-known photoluminescence from PPV. The dependencies on both pump- and probe densities denote much lower saturation intensity in photoinduced absorption as compared with that in stimulated emission from the identical primary photoexcitations, the singlet excitons. We have also discussed the nature of SNE, which has a correlation with an appearance of ultrafast decay component (τ approx. 1 ps) in temporal decay profile of the photoinduced absorption signal.

Original language	English
Pages (from-to)	959-960
Number of pages	2
Journal	Synthetic Metals
Volume	102
Issue number	1-3
DOIs	https://doi.org/10.1016/S0379-6779(98)00994-1
Publication status	Published - 1999 Jun
Event	Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier Duration: 1998 Jul 12 → 1998 Jul 18

Bibliographical note

Funding Information:
Finally, it is interesting to see the SNE appeared only at high pump-power density. It should be noted that SNE have strong correlation with the appearance of ultrafast decay time constants (ca. 1 ps) in the temporal profiles of transient absorption signal regardless of the probe wavelength, which is responsible for PA and ground-state bleaching recovery (see the inset (a) and (b) of Fig. l(A) and (B). The absence of any structure due to SE in the transient absorption spectra under this high pump-power density led us to propose that neither an amplification of spontaneous emission nor SE is probable candidates to explain the nature of SNE. We tentatively propose that SNE is likely to result from the radiative recombination from the correlated emitters which produced in photoexcited PPV films under high pump-power density. The further work related on this topic is in progress. This work has been financially supported by Star Project (SCJ) and Creative Research Initiatives (DK) of the Ministry of Science and Technology of Korea.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/S0379-6779(98)00994-1

Cite this

@article{e3bc4e9870d84af49f92a1e57c845715,

title = "Investigation on relaxation dynamics of photoexcitations and spectral narrowing of photoluminescence in PPV films",

abstract = "Photoinduced absorption spectral feature as well as their temporal profiles on PPV thin film in femtosecond time regime exhibit a strong pump power density dependence. The increase in pump power density also results in the spectrally narrowed emission (SNE) band superimposed to the well-known photoluminescence from PPV. The dependencies on both pump- and probe densities denote much lower saturation intensity in photoinduced absorption as compared with that in stimulated emission from the identical primary photoexcitations, the singlet excitons. We have also discussed the nature of SNE, which has a correlation with an appearance of ultrafast decay component (τ approx. 1 ps) in temporal decay profile of the photoinduced absorption signal.",

author = "Jeoung, {Sac Chae} and Kim, {Yong Hee} and Dongho Kim and Han, {Ja Young} and Jang, {Min Sik} and Shim, {Hong Ku}",

note = "Funding Information: Finally, it is interesting to see the SNE appeared only at high pump-power density. It should be noted that SNE have strong correlation with the appearance of ultrafast decay time constants (ca. 1 ps) in the temporal profiles of transient absorption signal regardless of the probe wavelength, which is responsible for PA and ground-state bleaching recovery (see the inset (a) and (b) of Fig. l(A) and (B). The absence of any structure due to SE in the transient absorption spectra under this high pump-power density led us to propose that neither an amplification of spontaneous emission nor SE is probable candidates to explain the nature of SNE. We tentatively propose that SNE is likely to result from the radiative recombination from the correlated emitters which produced in photoexcited PPV films under high pump-power density. The further work related on this topic is in progress. This work has been financially supported by Star Project (SCJ) and Creative Research Initiatives (DK) of the Ministry of Science and Technology of Korea.; Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) ; Conference date: 12-07-1998 Through 18-07-1998",

year = "1999",

month = jun,

doi = "10.1016/S0379-6779(98)00994-1",

language = "English",

volume = "102",

pages = "959--960",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier BV",

number = "1-3",

}

TY - JOUR

T1 - Investigation on relaxation dynamics of photoexcitations and spectral narrowing of photoluminescence in PPV films

AU - Jeoung, Sac Chae

AU - Kim, Yong Hee

AU - Kim, Dongho

AU - Han, Ja Young

AU - Jang, Min Sik

AU - Shim, Hong Ku

N1 - Funding Information: Finally, it is interesting to see the SNE appeared only at high pump-power density. It should be noted that SNE have strong correlation with the appearance of ultrafast decay time constants (ca. 1 ps) in the temporal profiles of transient absorption signal regardless of the probe wavelength, which is responsible for PA and ground-state bleaching recovery (see the inset (a) and (b) of Fig. l(A) and (B). The absence of any structure due to SE in the transient absorption spectra under this high pump-power density led us to propose that neither an amplification of spontaneous emission nor SE is probable candidates to explain the nature of SNE. We tentatively propose that SNE is likely to result from the radiative recombination from the correlated emitters which produced in photoexcited PPV films under high pump-power density. The further work related on this topic is in progress. This work has been financially supported by Star Project (SCJ) and Creative Research Initiatives (DK) of the Ministry of Science and Technology of Korea.

PY - 1999/6

Y1 - 1999/6

N2 - Photoinduced absorption spectral feature as well as their temporal profiles on PPV thin film in femtosecond time regime exhibit a strong pump power density dependence. The increase in pump power density also results in the spectrally narrowed emission (SNE) band superimposed to the well-known photoluminescence from PPV. The dependencies on both pump- and probe densities denote much lower saturation intensity in photoinduced absorption as compared with that in stimulated emission from the identical primary photoexcitations, the singlet excitons. We have also discussed the nature of SNE, which has a correlation with an appearance of ultrafast decay component (τ approx. 1 ps) in temporal decay profile of the photoinduced absorption signal.

AB - Photoinduced absorption spectral feature as well as their temporal profiles on PPV thin film in femtosecond time regime exhibit a strong pump power density dependence. The increase in pump power density also results in the spectrally narrowed emission (SNE) band superimposed to the well-known photoluminescence from PPV. The dependencies on both pump- and probe densities denote much lower saturation intensity in photoinduced absorption as compared with that in stimulated emission from the identical primary photoexcitations, the singlet excitons. We have also discussed the nature of SNE, which has a correlation with an appearance of ultrafast decay component (τ approx. 1 ps) in temporal decay profile of the photoinduced absorption signal.

UR - http://www.scopus.com/inward/record.url?scp=0033137917&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033137917&partnerID=8YFLogxK

U2 - 10.1016/S0379-6779(98)00994-1

DO - 10.1016/S0379-6779(98)00994-1

M3 - Conference article

AN - SCOPUS:0033137917

SN - 0379-6779

VL - 102

SP - 959

EP - 960

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1-3

T2 - Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98)

Y2 - 12 July 1998 through 18 July 1998

ER -

Investigation on relaxation dynamics of photoexcitations and spectral narrowing of photoluminescence in PPV films

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this