期刊
ADVANCED FUNCTIONAL MATERIALS
卷 29, 期 46, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201905340
关键词
low crystallinity; polymer semiconductors; stretchable electronics
类别
资金
- Air Force Office of Scientific Research [FA9550-18-1-0143]
- European Commission through a Marie-Curie Individual Fellowship (EC) [747461]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Science [DE-SC0019361]
- National Science Foundation Office of Integrative Activities [1757220]
- Samsung Scholarship
- National Science Foundation [ECCS-1542152]
- Marie Curie Actions (MSCA) [747461] Funding Source: Marie Curie Actions (MSCA)
- Office Of The Director
- Office of Integrative Activities [1757220] Funding Source: National Science Foundation
For wearable and implantable electronics applications, developing intrinsically stretchable polymer semiconductor is advantageous, especially in the manufacturing of large-area and high-density devices. A major challenge is to simultaneously achieve good electrical and mechanical properties for these semiconductor devices. While crystalline domains are generally needed to achieve high mobility, amorphous domains are necessary to impart stretchability. Recent progresses in the design of high-performance donor-acceptor polymers that exhibit low degrees of energetic disorder, while having a high fraction of amorphous domains, appear promising for polymer semiconductors. Here, a low crystalline, i.e., near-amorphous, indacenodithiophene-co-benzothiadiazole (IDTBT) polymer and a semicrystalline thieno[3,2-b]thiophene-diketopyrrolopyrrole (DPPTT) are compared, for mechanical properties and electrical performance under strain. It is observed that IDTBT is able to achieve both a high modulus and high fracture strain, and to preserve electrical functionality under high strain. Next, fully stretchable transistors are fabricated using the IDTBT polymer and observed mobility approximate to 0.6 cm(2) V-1 s(-1) at 100% strain along stretching direction. In addition, the morphological evolution of the stretched IDTBT films is investigated by polarized UV-vis and grazing-incidence X-ray diffraction to elucidate the molecular origins of high ductility. In summary, the near-amorphous IDTBT polymer signifies a promising direction regarding molecular design principles toward intrinsically stretchable high-performance polymer semiconductor.
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