Yoon, Seongwon Lee, Keun Jun Park, Sungmin Kim, Taehee Im, Sang Hyuk Ahn, Hyungju Son, Hae Jung 2024-01-19T15:01:40Z 2024-01-19T15:01:40Z 2022-01-10 2021-04-13 0024-9297 https://pubs.kist.re.kr/handle/201004/117136 Developing intrinsically self-healable semiconducting polymers is particularly important for realizing stretchable electronic devices which can spontaneously recover their mechanical damage. We synthesized a series of conjugated donor polymers (PTO2-tm series) functionalized with a thymine group at the terminal of the side chain. Bulk heterojunction (BHJ) films of PTO2-tm polymers blended with an IT-4F acceptor achieved power conversion efficiencies up to 11.9% from the BHJ-based organic photovoltaics, which are comparable with that of unfunctionalized PTO2 and, however, exhibited much improved stretchability by virtue of stress dissipation in the BHJ films during mechanical deformation. More importantly, the corresponding BHJ film prepared with a melamine additive efficiently recovered their packing structures after being mechanically damaged by stretching. As a result, reversible multiple hydrogen bonding of the melamine molecule with thymine in PTO2-tm polymers showed much improved crack onset strain and maximum recoverable strain compared with PTO2.Y English AMER CHEMICAL SOC SEMICONDUCTING POLYMER FILM TRANSISTORS HIGH-PERFORMANCE MORPHOLOGY ENERGY TRANSPORT HYDROGELS STRAIN TOUGH GELS Development of a Healable Bulk Heterojunction Using Conjugated Donor Polymers Based on Thymine-Functionalized Side Chains Article 10.1021/acs.macromol.0c02673 1 MACROMOLECULES, v.54, no.7, pp.3478 - 3488 MACROMOLECULES 54 7 3478 3488 scie scopus 000640891600042 2-s2.0-85103781003 Polymer Science Polymer Science Article SEMICONDUCTING POLYMER FILM TRANSISTORS HIGH-PERFORMANCE MORPHOLOGY ENERGY TRANSPORT HYDROGELS STRAIN TOUGH GELS