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Transient Strain-Induced Electronic Structure Modulation in a Semiconducting Polymer Imaged by Scanning Ultrafast Electron Microscopy

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dc.contributor.authorKim, Taeyong-
dc.contributor.authorOh, Saejin-
dc.contributor.authorChoudhry, Usama-
dc.contributor.authorMeinhart, Carl D.-
dc.contributor.authorChabinyc, Michael L.-
dc.contributor.authorLiao, Bolin-
dc.date.accessioned2024-05-09T00:44:28Z-
dc.date.available2024-05-09T00:44:28Z-
dc.date.created2024-05-09-
dc.date.created2024-05-09-
dc.date.issued2021-11-
dc.identifier.citationNANO LETTERS, Vol.21 No.21, pp.9146-9152-
dc.identifier.issn1530-6984-
dc.identifier.urihttps://hdl.handle.net/10371/201246-
dc.description.abstractUnderstanding the optoelectronic properties of semiconducting polymers under external strain is essential for their applications in flexible devices. Although prior studies have highlighted the impact of static and macroscopic strains, assessing the effect of a local transient deformation before structural relaxation occurs remains challenging. Here, we employ scanning ultrafast electron microscopy (SUEM) to image the dynamics of a photoinduced transient strain in the semiconducting polymer poly(3-hexylthiophene) (P3HT). We observe that the photoinduced SUEM contrast, corresponding to the local change of secondary electron emission, exhibits an unusual ring-shaped profile. We attribute the observation to the electronic structure modulation of P3HT caused by a photoinduced strain field owing to its low modulus and strong electron-lattice coupling, supported by a finite-element analysis. Our work provides insights into tailoring optoelectronic properties using transient mechanical deformation in semiconducting polymers and demonstrates the versatility of SUEM to study photophysical processes in diverse materials.-
dc.language영어-
dc.publisherAMER CHEMICAL SOC-
dc.titleTransient Strain-Induced Electronic Structure Modulation in a Semiconducting Polymer Imaged by Scanning Ultrafast Electron Microscopy-
dc.typeArticle-
dc.identifier.doi10.1021/acs.nanolett.1c02963-
dc.citation.journaltitleNANO LETTERS-
dc.identifier.wosid000718298700027-
dc.identifier.scopusid2-s2.0-85118772812-
dc.citation.endpage9152-
dc.citation.number21-
dc.citation.startpage9146-
dc.citation.volume21-
dc.description.isOpenAccessY-
dc.contributor.affiliatedAuthorKim, Taeyong-
dc.type.docTypeArticle-
dc.description.journalClass1-
dc.subject.keywordPlusPHOTOCARRIER DYNAMICS-
dc.subject.keywordPlusFILMS-
dc.subject.keywordPlusPOLYTHIOPHENE-
dc.subject.keywordAuthorultrafast electron microscopy-
dc.subject.keywordAuthorsemiconducting polymer-
dc.subject.keywordAuthorstrain effect-
dc.subject.keywordAuthorsecondary electron emission-
dc.subject.keywordAuthorphotoelastic effect-
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  • College of Engineering
  • Department of Mechanical Engineering
Research Area Radiative cooling, Thermal conduction in materials, Ultrafast optical spectroscopy and ultrafast electron microscopy, 복사 냉각, 열 전도 물성 분석 및 방열 소재 개발, 초고속 레이저 분광학 및 전자현미경

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