Impact of gamma-ray irradiation on the electronic structures of PCBM and P3HT organic semiconductor films

Sohyun Park; Seungsun Choi; Hyunchan Lee; Jiyeon Lee; Yunseo Woo; Yu Jin Jung; Young Mee Jung; Junkyeong Jeong; Jeehong Park; Yeonjin Yi; Soohyung Park; Hyunbok Lee

doi:10.1016/j.polymdegradstab.2021.109518

Impact of gamma-ray irradiation on the electronic structures of PCBM and P3HT organic semiconductor films

Sohyun Park, Seungsun Choi, Hyunchan Lee, Jiyeon Lee, Yunseo Woo, Yu Jin Jung, Young Mee Jung, Junkyeong Jeong, Jeehong Park, Yeonjin Yi, Soohyung Park, Hyunbok Lee

Department of Physics

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

5 Citations (Scopus)

Abstract

Gamma-ray irradiation alters the material properties of organic semiconductors, especially the electronic structure. These changes due to ionization can be useful in dosimetry. Although there are some device-based reports, the effect of gamma-ray irradiation on the electronic structure of organic semiconductors is still unclear. In this study, we investigated the electronic structures of representative organic semiconductor films, namely, n-type [6,6]-phenyl-C₆₁-butyric acid methyl ester (PCBM) and p-type poly(3-hexylthiophene-2,5-diyl) (P3HT), after gamma-ray irradiation generated by a Cs-137 source. The X-ray and ultraviolet photoelectron spectra of the PCBM and P3HT films were measured for various gamma-ray doses. In both PCBM and P3HT, chemical interaction with atmospheric oxygen, assisted by high-energy photons, led to significant oxidation. However, the degree of oxidation of PCBM was considerably higher than that of P3HT. The oxidation also affects the valence electronic structures. The possible chemical structures of the oxidized PCBM and P3HT are estimated using density functional theory calculations.

Original language	English
Article number	109518
Journal	Polymer Degradation and Stability
Volume	186
DOIs	https://doi.org/10.1016/j.polymdegradstab.2021.109518
Publication status	Published - 2021 Apr

Bibliographical note

Funding Information:
This study was supported by the National Research Foundation of Korea (NRF-2018R1D1A1B07051050, 2018R1A6A1A03025582, and 2015M2B2A6028602). The XPS measurement was performed using the instrument at the Central Laboratory of Kangwon National University. The gamma-ray irradiation was performed using the instrument in Kangwon Radiation Convergence Research Support Center of Korea Basic Science Institute (KBSI) at Kangwon National University.

Funding Information:
This study was supported by the National Research Foundation of Korea ( NRF-2018R1D1A1B07051050 , 2018R1A6A1A03025582 , and 2015M2B2A6028602 ). The XPS measurement was performed using the instrument at the Central Laboratory of Kangwon National University. The gamma-ray irradiation was performed using the instrument in Kangwon Radiation Convergence Research Support Center of Korea Basic Science Institute (KBSI) at Kangwon National University.

Publisher Copyright:
© 2021

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Polymers and Plastics
Materials Chemistry

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10.1016/j.polymdegradstab.2021.109518

Cite this

@article{9523656158c448c482d54c448ebc6426,

title = "Impact of gamma-ray irradiation on the electronic structures of PCBM and P3HT organic semiconductor films",

abstract = "Gamma-ray irradiation alters the material properties of organic semiconductors, especially the electronic structure. These changes due to ionization can be useful in dosimetry. Although there are some device-based reports, the effect of gamma-ray irradiation on the electronic structure of organic semiconductors is still unclear. In this study, we investigated the electronic structures of representative organic semiconductor films, namely, n-type [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and p-type poly(3-hexylthiophene-2,5-diyl) (P3HT), after gamma-ray irradiation generated by a Cs-137 source. The X-ray and ultraviolet photoelectron spectra of the PCBM and P3HT films were measured for various gamma-ray doses. In both PCBM and P3HT, chemical interaction with atmospheric oxygen, assisted by high-energy photons, led to significant oxidation. However, the degree of oxidation of PCBM was considerably higher than that of P3HT. The oxidation also affects the valence electronic structures. The possible chemical structures of the oxidized PCBM and P3HT are estimated using density functional theory calculations.",

author = "Sohyun Park and Seungsun Choi and Hyunchan Lee and Jiyeon Lee and Yunseo Woo and Jung, {Yu Jin} and Jung, {Young Mee} and Junkyeong Jeong and Jeehong Park and Yeonjin Yi and Soohyung Park and Hyunbok Lee",

note = "Funding Information: This study was supported by the National Research Foundation of Korea (NRF-2018R1D1A1B07051050, 2018R1A6A1A03025582, and 2015M2B2A6028602). The XPS measurement was performed using the instrument at the Central Laboratory of Kangwon National University. The gamma-ray irradiation was performed using the instrument in Kangwon Radiation Convergence Research Support Center of Korea Basic Science Institute (KBSI) at Kangwon National University. Funding Information: This study was supported by the National Research Foundation of Korea ( NRF-2018R1D1A1B07051050 , 2018R1A6A1A03025582 , and 2015M2B2A6028602 ). The XPS measurement was performed using the instrument at the Central Laboratory of Kangwon National University. The gamma-ray irradiation was performed using the instrument in Kangwon Radiation Convergence Research Support Center of Korea Basic Science Institute (KBSI) at Kangwon National University. Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = apr,

doi = "10.1016/j.polymdegradstab.2021.109518",

language = "English",

volume = "186",

journal = "Polymer Degradation and Stability",

issn = "0141-3910",

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T1 - Impact of gamma-ray irradiation on the electronic structures of PCBM and P3HT organic semiconductor films

AU - Park, Sohyun

AU - Choi, Seungsun

AU - Lee, Hyunchan

AU - Lee, Jiyeon

AU - Woo, Yunseo

AU - Jung, Yu Jin

AU - Jung, Young Mee

AU - Jeong, Junkyeong

AU - Park, Jeehong

AU - Yi, Yeonjin

AU - Park, Soohyung

AU - Lee, Hyunbok

N1 - Funding Information: This study was supported by the National Research Foundation of Korea (NRF-2018R1D1A1B07051050, 2018R1A6A1A03025582, and 2015M2B2A6028602). The XPS measurement was performed using the instrument at the Central Laboratory of Kangwon National University. The gamma-ray irradiation was performed using the instrument in Kangwon Radiation Convergence Research Support Center of Korea Basic Science Institute (KBSI) at Kangwon National University. Funding Information: This study was supported by the National Research Foundation of Korea ( NRF-2018R1D1A1B07051050 , 2018R1A6A1A03025582 , and 2015M2B2A6028602 ). The XPS measurement was performed using the instrument at the Central Laboratory of Kangwon National University. The gamma-ray irradiation was performed using the instrument in Kangwon Radiation Convergence Research Support Center of Korea Basic Science Institute (KBSI) at Kangwon National University. Publisher Copyright: © 2021

PY - 2021/4

Y1 - 2021/4

N2 - Gamma-ray irradiation alters the material properties of organic semiconductors, especially the electronic structure. These changes due to ionization can be useful in dosimetry. Although there are some device-based reports, the effect of gamma-ray irradiation on the electronic structure of organic semiconductors is still unclear. In this study, we investigated the electronic structures of representative organic semiconductor films, namely, n-type [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and p-type poly(3-hexylthiophene-2,5-diyl) (P3HT), after gamma-ray irradiation generated by a Cs-137 source. The X-ray and ultraviolet photoelectron spectra of the PCBM and P3HT films were measured for various gamma-ray doses. In both PCBM and P3HT, chemical interaction with atmospheric oxygen, assisted by high-energy photons, led to significant oxidation. However, the degree of oxidation of PCBM was considerably higher than that of P3HT. The oxidation also affects the valence electronic structures. The possible chemical structures of the oxidized PCBM and P3HT are estimated using density functional theory calculations.

AB - Gamma-ray irradiation alters the material properties of organic semiconductors, especially the electronic structure. These changes due to ionization can be useful in dosimetry. Although there are some device-based reports, the effect of gamma-ray irradiation on the electronic structure of organic semiconductors is still unclear. In this study, we investigated the electronic structures of representative organic semiconductor films, namely, n-type [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and p-type poly(3-hexylthiophene-2,5-diyl) (P3HT), after gamma-ray irradiation generated by a Cs-137 source. The X-ray and ultraviolet photoelectron spectra of the PCBM and P3HT films were measured for various gamma-ray doses. In both PCBM and P3HT, chemical interaction with atmospheric oxygen, assisted by high-energy photons, led to significant oxidation. However, the degree of oxidation of PCBM was considerably higher than that of P3HT. The oxidation also affects the valence electronic structures. The possible chemical structures of the oxidized PCBM and P3HT are estimated using density functional theory calculations.

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U2 - 10.1016/j.polymdegradstab.2021.109518

DO - 10.1016/j.polymdegradstab.2021.109518

M3 - Article

AN - SCOPUS:85101394375

SN - 0141-3910

VL - 186

JO - Polymer Degradation and Stability

JF - Polymer Degradation and Stability

M1 - 109518

ER -

Impact of gamma-ray irradiation on the electronic structures of PCBM and P3HT organic semiconductor films

Abstract

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