Lee, Yoo-Yong Choi, Gwang Mook Lim, Seung-Min Cho, Ju-Young Choi, In-Suk Nam, Ki Tae Joo, Young-Chang 2024-01-20T04:31:21Z 2024-01-20T04:31:21Z 2021-09-04 2016-04-29 2045-2322 https://pubs.kist.re.kr/handle/201004/124156 Understanding the mechanism of the strain-dependent conductivity change in polymers in stretched conditions is important. We observed a strain-induced growth of the conductive regions of PEDOT:PSS films, induced by a coalescence of conductive PEDOT-rich cores. This growth due to coalescence leads to a gradual decrease in the electrical resistivity up to 95%, independent of the thickness of the PEDOT: PSS films. The primary mechanism for the evolution of the PEDOT-rich cores proceeds by the cores growing larger as they consuming relatively smaller cores. This process is caused by a strain-induced local rearrangement of PEDOT segments in the vicinity of PSS shells around the cores and also changes the chemical environment in PEDOT, induced by the electron-withdrawing effects around the PEDOT chains. The strain-induced growth mechanism is beneficial to understanding the phenomenon of polymeric chain rearrangement in mechanical deformation and to modulating the electrical conductivity for practical applications. English NATURE PUBLISHING GROUP ORGANIC SOLAR-CELLS PIEZORESISTANCE CONDUCTIVITY CONDUCTORS EFFICIENT ELECTRODE Growth Mechanism of Strain-Dependent Morphological Change in PEDOT:PSS Films Article 10.1038/srep25332 1 SCIENTIFIC REPORTS, v.6 SCIENTIFIC REPORTS 6 scie scopus 000375186100001 2-s2.0-84971350463 Multidisciplinary Sciences Science & Technology - Other Topics Article ORGANIC SOLAR-CELLS PIEZORESISTANCE CONDUCTIVITY CONDUCTORS EFFICIENT ELECTRODE