High Aspect Ratio Conjugated Polymer Nanowires for High Performance Field-Effect Transistors and Phototransistors
- Authors
- Um, Hyun Ah; Lee, Dae Hee; Heo, Dong Uk; Yang, Da Seul; Shin, Jicheol; Baik, Hionsuck; Cho, Min Ju; Choi, Dong Hoon
- Issue Date
- 5월-2015
- Publisher
- AMER CHEMICAL SOC
- Keywords
- diketopyrrolopyrrole; selenophene; polymer nanowire; field-effect transistor; phototransistor
- Citation
- ACS NANO, v.9, no.5, pp.5264 - 5274
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS NANO
- Volume
- 9
- Number
- 5
- Start Page
- 5264
- End Page
- 5274
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/93634
- DOI
- 10.1021/acsnano.5b01982
- ISSN
- 1936-0851
- Abstract
- We synthesized a highly crystalline DPP-based polymer, DPPBTSPE, which contained 1,2-bis(5-(thiophen-2-yl)selenophen-2-ypethene as a planar and rigid electron donating group. High- and low-molecular weight (MW) DPPBTSPE fractions were collected by Soxhlet extraction and were employed to investigate their unique charge transport properties in macroscopic films and single crystalline polymer nanowire (SC-PNW), respectively. The low-MW polymer could provide well-isolated and high aspect ratio SC-PNWs, in which the direction of pi-pi gt stacking was perpendicular to the wire growing axis. The field effect transistors made of SC-PNWs exhibited remarkably high carrier mobility of 24 cm(2) V-1 s(-1). In addition, phototransistors (PTs) made of SC-PNW showed very high performance in terms of photoresponsivity (R) and photoswitching ratio (P). The average R of the SC PNW-based PTs were in the range of 160-170 A W-1 and the maximum R was measured at 1920 A W-1, which is almost three orders higher than that of thin film-based PT device.
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