Singlet-triplet splitting of geminate electron-hole pairs in conjugated polymers

A. Kadashchuk; A. Vakhnin; I. Blonski; D. Beljonne; Z. Shuai; J. L. Brédas; V. I. Arkhipov; P. Heremans; E. V. Emelianova; H. Bässler

doi:10.1103/PhysRevLett.93.066803

Singlet-triplet splitting of geminate electron-hole pairs in conjugated polymers

A. Kadashchuk
, A. Vakhnin
, I. Blonski
, D. Beljonne
, Z. Shuai
, J. L. Brédas
, V. I. Arkhipov
, P. Heremans
, E. V. Emelianova
, H. Bässler

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

58 Scopus citations

Abstract

The thermally stimulated luminescence technique was used for investigating the singlet-triplet splitting of geminate polaron pairs in a ladder-type conjugated polymer. The energy gap that separated the single and triplet states of geminate pairs depended on the polymer morphology and was measured to be in the range of 3-6 meV. THe singlet-triplet branching was strongly impacted by the sample morphology. The low splitting values obtained from quantum-chemical calculations were found to be important for the spin-dependent exciton formation in conjugated polymers.

Original language	English (US)
Article number	066803
Pages (from-to)	066803-1-066803-4
Journal	Physical review letters
Volume	93
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.93.066803
State	Published - Aug 6 2004
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.93.066803

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title = "Singlet-triplet splitting of geminate electron-hole pairs in conjugated polymers",

abstract = "The thermally stimulated luminescence technique was used for investigating the singlet-triplet splitting of geminate polaron pairs in a ladder-type conjugated polymer. The energy gap that separated the single and triplet states of geminate pairs depended on the polymer morphology and was measured to be in the range of 3-6 meV. THe singlet-triplet branching was strongly impacted by the sample morphology. The low splitting values obtained from quantum-chemical calculations were found to be important for the spin-dependent exciton formation in conjugated polymers.",

author = "A. Kadashchuk and A. Vakhnin and I. Blonski and D. Beljonne and Z. Shuai and Br{\'e}das, \{J. L.\} and Arkhipov, \{V. I.\} and P. Heremans and Emelianova, \{E. V.\} and H. B{\"a}ssler",

note = "Funding Information: We thank U. Scherf for supplying the MeLPPP polymers. This work was supported by the NATO Collaborative Linkage Grant No. PST.CLG 978952 and by the EU-RTN Project LAMINATE. The work at Georgia Tech was supported in part by the National Science Foundation (through the STC Program under Award No. DMR-0120967 and Grant No. CHE-CHE-0342321), by the Office of Naval Research, and by the IBM Shared University Research Program. The work in Mons was partly supported by the European Commission IST program “STEPLED,” by the Belgian Federal Services for Scientific, Technical, and Cultural Affairs (InterUniversity Attraction Pole 5 / 3 ), and by the Belgian National Science Foundation (FNRS). The work in Beijing was supported by the National Science Foundation of China (Grant No. 90203015) and by the Ministry of Science and Technology of China (973 programme Grant No. 2002CB613406).",

year = "2004",

month = aug,

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doi = "10.1103/PhysRevLett.93.066803",

language = "English (US)",

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AU - Kadashchuk, A.

AU - Vakhnin, A.

AU - Blonski, I.

AU - Beljonne, D.

AU - Shuai, Z.

AU - Brédas, J. L.

AU - Arkhipov, V. I.

AU - Heremans, P.

AU - Emelianova, E. V.

AU - Bässler, H.

N1 - Funding Information: We thank U. Scherf for supplying the MeLPPP polymers. This work was supported by the NATO Collaborative Linkage Grant No. PST.CLG 978952 and by the EU-RTN Project LAMINATE. The work at Georgia Tech was supported in part by the National Science Foundation (through the STC Program under Award No. DMR-0120967 and Grant No. CHE-CHE-0342321), by the Office of Naval Research, and by the IBM Shared University Research Program. The work in Mons was partly supported by the European Commission IST program “STEPLED,” by the Belgian Federal Services for Scientific, Technical, and Cultural Affairs (InterUniversity Attraction Pole 5 / 3 ), and by the Belgian National Science Foundation (FNRS). The work in Beijing was supported by the National Science Foundation of China (Grant No. 90203015) and by the Ministry of Science and Technology of China (973 programme Grant No. 2002CB613406).

PY - 2004/8/6

Y1 - 2004/8/6

N2 - The thermally stimulated luminescence technique was used for investigating the singlet-triplet splitting of geminate polaron pairs in a ladder-type conjugated polymer. The energy gap that separated the single and triplet states of geminate pairs depended on the polymer morphology and was measured to be in the range of 3-6 meV. THe singlet-triplet branching was strongly impacted by the sample morphology. The low splitting values obtained from quantum-chemical calculations were found to be important for the spin-dependent exciton formation in conjugated polymers.

AB - The thermally stimulated luminescence technique was used for investigating the singlet-triplet splitting of geminate polaron pairs in a ladder-type conjugated polymer. The energy gap that separated the single and triplet states of geminate pairs depended on the polymer morphology and was measured to be in the range of 3-6 meV. THe singlet-triplet branching was strongly impacted by the sample morphology. The low splitting values obtained from quantum-chemical calculations were found to be important for the spin-dependent exciton formation in conjugated polymers.

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JO - Physical review letters

JF - Physical review letters

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ER -

Singlet-triplet splitting of geminate electron-hole pairs in conjugated polymers

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