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

Title
Impact of gamma-ray irradiation on the electronic structures of PCBM and P3HT organic semiconductor films
Authors
박수형Sohyun ParkSeungsun ChoiHyunchan LeeJiyeon LeeYunseo WooYu-Jin JungYoung Mee JungJunkyeong JeongJeehong ParkYeonjin YiHyunbok Lee
Issue Date
2021-04
Publisher
Polymer degradation and stability
Citation
VOL 186, 109518
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.
URI
http://pubs.kist.re.kr/handle/201004/72905
ISSN
0141-3910
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE