Exciton dynamics in an energy up-converting solid state system based on diphenylanthracene doped with platinum octaethylporphyrin

R. Karpicz; S. Puzinas; V. Gulbinas; A. Vakhnin; A. Kadashchuk; Barry P. Rand

doi:10.1016/j.chemphys.2013.12.004

Exciton dynamics in an energy up-converting solid state system based on diphenylanthracene doped with platinum octaethylporphyrin

R. Karpicz, S. Puzinas, V. Gulbinas, A. Vakhnin, A. Kadashchuk, Barry P. Rand

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

Photophysics of composite solid films based on 9,10-diphenylanthracene (DPA) doped with Pt(II)octaethylporphyrin (PtOEP) has been investigated by means of transient absorption and luminescence spectroscopy. The DPA:PtOEP host:guest system is a benchmark for incoherent energy up-conversion via triplet fusion in solution and we focus here on photophysical processes of this system in solid films. The triplet energy transfer from PtOEP to DPA takes place during tens of ns, featuring a thermally activated behavior. This implies that, before being transferred to the host, triplets migrate within PtOEP aggregates, defining a rate limiting step for the overall energy transfer to DPA. In contrast to other porphyrin-based sensitizers, no significant triplet-triplet annihilation was found to happen during triplet migration within PtOEP aggregates, implying that such a triplet loss mechanism does not universally apply to porphyrin-based organometallic complexes.

Original language	English (US)
Pages (from-to)	57-62
Number of pages	6
Journal	Chemical Physics
Volume	429
DOIs	https://doi.org/10.1016/j.chemphys.2013.12.004
State	Published - Jan 31 2014

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

Keywords

Energy transfer
Host-guest system
Incoherent photon upconversion
Phosphorescence
Platinum-octaethyl-porphyrin
Triplet-triplet annihilation
Ultrafast spectroscopy

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10.1016/j.chemphys.2013.12.004

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title = "Exciton dynamics in an energy up-converting solid state system based on diphenylanthracene doped with platinum octaethylporphyrin",

abstract = "Photophysics of composite solid films based on 9,10-diphenylanthracene (DPA) doped with Pt(II)octaethylporphyrin (PtOEP) has been investigated by means of transient absorption and luminescence spectroscopy. The DPA:PtOEP host:guest system is a benchmark for incoherent energy up-conversion via triplet fusion in solution and we focus here on photophysical processes of this system in solid films. The triplet energy transfer from PtOEP to DPA takes place during tens of ns, featuring a thermally activated behavior. This implies that, before being transferred to the host, triplets migrate within PtOEP aggregates, defining a rate limiting step for the overall energy transfer to DPA. In contrast to other porphyrin-based sensitizers, no significant triplet-triplet annihilation was found to happen during triplet migration within PtOEP aggregates, implying that such a triplet loss mechanism does not universally apply to porphyrin-based organometallic complexes.",

keywords = "Energy transfer, Host-guest system, Incoherent photon upconversion, Phosphorescence, Platinum-octaethyl-porphyrin, Triplet-triplet annihilation, Ultrafast spectroscopy",

author = "R. Karpicz and S. Puzinas and V. Gulbinas and A. Vakhnin and A. Kadashchuk and Rand, {Barry P.}",

note = "Funding Information: The research was supported by the Research Council of Lithuania under Lithuanian-Ukraine project No. TAP LU 10/2012 and by the bilateral project M/342-2012 of DKNII of Ukraine. The authors gratefully acknowledge valuable discussions with Prof. H. B{\"a}ssler and Prof. J. Genoe. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

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language = "English (US)",

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AU - Karpicz, R.

AU - Puzinas, S.

AU - Gulbinas, V.

AU - Vakhnin, A.

AU - Kadashchuk, A.

AU - Rand, Barry P.

N1 - Funding Information: The research was supported by the Research Council of Lithuania under Lithuanian-Ukraine project No. TAP LU 10/2012 and by the bilateral project M/342-2012 of DKNII of Ukraine. The authors gratefully acknowledge valuable discussions with Prof. H. Bässler and Prof. J. Genoe. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 2014/1/31

Y1 - 2014/1/31

N2 - Photophysics of composite solid films based on 9,10-diphenylanthracene (DPA) doped with Pt(II)octaethylporphyrin (PtOEP) has been investigated by means of transient absorption and luminescence spectroscopy. The DPA:PtOEP host:guest system is a benchmark for incoherent energy up-conversion via triplet fusion in solution and we focus here on photophysical processes of this system in solid films. The triplet energy transfer from PtOEP to DPA takes place during tens of ns, featuring a thermally activated behavior. This implies that, before being transferred to the host, triplets migrate within PtOEP aggregates, defining a rate limiting step for the overall energy transfer to DPA. In contrast to other porphyrin-based sensitizers, no significant triplet-triplet annihilation was found to happen during triplet migration within PtOEP aggregates, implying that such a triplet loss mechanism does not universally apply to porphyrin-based organometallic complexes.

AB - Photophysics of composite solid films based on 9,10-diphenylanthracene (DPA) doped with Pt(II)octaethylporphyrin (PtOEP) has been investigated by means of transient absorption and luminescence spectroscopy. The DPA:PtOEP host:guest system is a benchmark for incoherent energy up-conversion via triplet fusion in solution and we focus here on photophysical processes of this system in solid films. The triplet energy transfer from PtOEP to DPA takes place during tens of ns, featuring a thermally activated behavior. This implies that, before being transferred to the host, triplets migrate within PtOEP aggregates, defining a rate limiting step for the overall energy transfer to DPA. In contrast to other porphyrin-based sensitizers, no significant triplet-triplet annihilation was found to happen during triplet migration within PtOEP aggregates, implying that such a triplet loss mechanism does not universally apply to porphyrin-based organometallic complexes.

KW - Energy transfer

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KW - Triplet-triplet annihilation

KW - Ultrafast spectroscopy

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ER -

Exciton dynamics in an energy up-converting solid state system based on diphenylanthracene doped with platinum octaethylporphyrin

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Keywords

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