Augmented Photoluminescence in a Conjugated Polymer by the Incorporation of CdSe/CdS Quantum Dots

Dongki Lee; Se Gyo Han; Yunmo Sung; Jungho Mun; Sung Hyuk Kim; Byeong Geun Jeong; Junsuk Rho; Sungjee Kim; Kilwon Cho; Dongyeop X. Oh; Mun Seok Jeong

doi:10.1021/acs.jpcc.0c07335

Augmented Photoluminescence in a Conjugated Polymer by the Incorporation of CdSe/CdS Quantum Dots

Dongki Lee, Se Gyo Han, Yunmo Sung, Jungho Mun, Sung Hyuk Kim, Byeong Geun Jeong, Junsuk Rho, Sungjee Kim, Kilwon Cho, Dongyeop X. Oh, Mun Seok Jeong

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4 Scopus citations

Abstract

We investigated the photophysical interactions between CdSe/CdS quantum dots (QDs) and a conjugated polymer (CP, P3HT). The photoluminescence intensity of P3HT in the QDs/P3HT hybrid system is significantly enhanced compared to that of the neat P3HT system. We found via transient absorption spectroscopy that the energy level differences at the interfaces between P3HT and QDs resulted in delayed relaxation dynamics of the P3HT singlet (S1) excitons and suppressed polaron formation. Thus, the radiative recombination of the S1 excitons occurs frequently in the hybrid system than in the neat P3HT system. Our findings on the CP-based hybrid system may provide important information to improve the efficiencies of optoelectronic devices, such as organic light-emitting diodes.

Original language	English
Pages (from-to)	20605-20613
Number of pages	9
Journal	Journal of Physical Chemistry C
Volume	124
Issue number	37
DOIs	https://doi.org/10.1021/acs.jpcc.0c07335
State	Published - 17 Sep 2020
Externally published	Yes

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Copyright © 2020 American Chemical Society.

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title = "Augmented Photoluminescence in a Conjugated Polymer by the Incorporation of CdSe/CdS Quantum Dots",

abstract = "We investigated the photophysical interactions between CdSe/CdS quantum dots (QDs) and a conjugated polymer (CP, P3HT). The photoluminescence intensity of P3HT in the QDs/P3HT hybrid system is significantly enhanced compared to that of the neat P3HT system. We found via transient absorption spectroscopy that the energy level differences at the interfaces between P3HT and QDs resulted in delayed relaxation dynamics of the P3HT singlet (S1) excitons and suppressed polaron formation. Thus, the radiative recombination of the S1 excitons occurs frequently in the hybrid system than in the neat P3HT system. Our findings on the CP-based hybrid system may provide important information to improve the efficiencies of optoelectronic devices, such as organic light-emitting diodes.",

author = "Dongki Lee and Han, {Se Gyo} and Yunmo Sung and Jungho Mun and Kim, {Sung Hyuk} and Jeong, {Byeong Geun} and Junsuk Rho and Sungjee Kim and Kilwon Cho and Oh, {Dongyeop X.} and Jeong, {Mun Seok}",

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doi = "10.1021/acs.jpcc.0c07335",

language = "English",

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T1 - Augmented Photoluminescence in a Conjugated Polymer by the Incorporation of CdSe/CdS Quantum Dots

AU - Lee, Dongki

AU - Han, Se Gyo

AU - Sung, Yunmo

AU - Mun, Jungho

AU - Kim, Sung Hyuk

AU - Jeong, Byeong Geun

AU - Rho, Junsuk

AU - Kim, Sungjee

AU - Cho, Kilwon

AU - Oh, Dongyeop X.

AU - Jeong, Mun Seok

PY - 2020/9/17

Y1 - 2020/9/17

N2 - We investigated the photophysical interactions between CdSe/CdS quantum dots (QDs) and a conjugated polymer (CP, P3HT). The photoluminescence intensity of P3HT in the QDs/P3HT hybrid system is significantly enhanced compared to that of the neat P3HT system. We found via transient absorption spectroscopy that the energy level differences at the interfaces between P3HT and QDs resulted in delayed relaxation dynamics of the P3HT singlet (S1) excitons and suppressed polaron formation. Thus, the radiative recombination of the S1 excitons occurs frequently in the hybrid system than in the neat P3HT system. Our findings on the CP-based hybrid system may provide important information to improve the efficiencies of optoelectronic devices, such as organic light-emitting diodes.

AB - We investigated the photophysical interactions between CdSe/CdS quantum dots (QDs) and a conjugated polymer (CP, P3HT). The photoluminescence intensity of P3HT in the QDs/P3HT hybrid system is significantly enhanced compared to that of the neat P3HT system. We found via transient absorption spectroscopy that the energy level differences at the interfaces between P3HT and QDs resulted in delayed relaxation dynamics of the P3HT singlet (S1) excitons and suppressed polaron formation. Thus, the radiative recombination of the S1 excitons occurs frequently in the hybrid system than in the neat P3HT system. Our findings on the CP-based hybrid system may provide important information to improve the efficiencies of optoelectronic devices, such as organic light-emitting diodes.

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 37

ER -

Augmented Photoluminescence in a Conjugated Polymer by the Incorporation of CdSe/CdS Quantum Dots

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