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Oh, Joon Hak
Organic Electronics Lab
Research Interests
  • Nano Molecular Electronics, Flexible Electronics, Organic Electronic Materials
  • Fabrication of Organic and Polymer Nanomaterials and Their Applications in Nanodevices
  • Nanoelectronics Based on Graphene and Carbon Nanotubes
  • Nano-/Micro-Patterning, Self-Assembly
  • Charge Transport Phenomenon


Solvent-Resistant Organic Transistors and Thermally Stable Organic Photovoltaics Based on Cross-linkable Conjugated Polymers

DC Field Value Language Kim, Hyeong Jun ko Han, A-Reum ko Cho, Chul-Hee ko Kang, Hyunbum ko Cho, Han-Hee ko Lee, Moo Yeol ko Frechet, Jean M. J. ko Oh, Joon Hak ko Kim, Bumjoon J. ko 2014-04-10T02:37:22Z - 2013-06-07 ko 2012-01 -
dc.identifier.citation CHEMISTRY OF MATERIALS, v.24, no.1, pp.215 - 221 ko
dc.identifier.issn 0897-4756 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract Conjugated polymers, in general, are unstable when exposed to air, solvent, or thermal treatment, and these challenges limit their practical applications. Therefore, it is of great importance to develop new materials or methodologies that can enable organic electronics with air stability, solvent resistance, and thermal stability. Herein, we have developed a simple but powerful approach to achieve solvent-resistant and thermally stable organic electronic devices with a remarkably improved air stability, by introducing an azide cross-linkable group into a conjugated polymer. To demonstrate this concept, we have synthesized polythiophene with azide groups attached to end of the alkyl chain (P3HT-azide). Photo-cross-linking of P3HT-azide copolymers dramatically improves the solvent resistance of the active layer without disrupting the molecular ordering and charge transport. This is the first demonstration of solvent-resistant organic transistors. Furthermore, the bulk-heterojunction organic photovoltaics (BHJ OPVs) containing P3HT-azide copolymers show an average efficiency higher than 3.3% after 40 h annealing at an elevated temperature of 150 C, which represents one of the most thermally stable OPV devices reported to date. This enhanced stability is due to an in situ compatibilizer that forms at the P3HT/PCBM interface and suppresses macrophase separation. Our approach paves a way toward organic electronics with robust and stable operations. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher AMER CHEMICAL SOC ko
dc.subject Active Layer ko
dc.subject Air stability ko
dc.subject Alkyl chain ko
dc.subject Azide group ko
dc.subject Bulk heterojunction ko
dc.subject Cross-linkable ko
dc.subject Elevated temperature ko
dc.subject Enhanced stability ko
dc.subject In-situ ko
dc.subject Macro phase separation ko
dc.subject Molecular ordering ko
dc.subject Organic electronic devices ko
dc.subject Organic electronics ko
dc.subject Organic photovoltaics ko
dc.subject Organic transistor ko
dc.subject Photocross-linking ko
dc.subject Poly-thiophene ko
dc.subject Solvent resistance ko
dc.subject Stable operation ko
dc.subject Thermally stable ko
dc.title Solvent-Resistant Organic Transistors and Thermally Stable Organic Photovoltaics Based on Cross-linkable Conjugated Polymers ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84862908267 ko
dc.identifier.wosid 000298908400029 ko
dc.type.rims ART ko
dc.description.wostc 34 *
dc.description.scopustc 41 * 2014-10-18 * 2014-07-12 *
dc.identifier.doi 10.1021/cm203058p ko
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