Highly ordered semiconducting polymer arrays for sensitive photodetectors

Xiao Wei, Hanfei Gao, Jiangang Feng, Yueyang Pi, Bo Zhang, Yu Zhai, Wen Wen, Mingqian He, James R. Matthews, Hongxiang Wang, Yang Li, Shimei Jiang, Lei Jiang, Yuchen Wu

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

Semiconducting conjugated polymers possess attractive optoelectronic properties and low-cost solution processability and are inherently mechanically flexible. However, the device performance is susceptible to the fabrication methods because of the relatively weak intermolecular interaction of the polymers and their inherent conformational and energetic disorder. An efficient fabrication technique for large-scale integration of high-quality polymer architectures is essential for realizing high-performance optoelectronic devices. Here, we report an efficient method for fabrication of polymer nanowire arrays with a precise position, a smooth surface, a homogeneous size, high crystallinity, and ordered molecular packing. The controllable dewetting dynamics on a template with asymmetric wettability permits the formation of discrete capillary bridges, resulting in the ordered molecular packing arising from unidirectional recession of the three-phase contact line. The high quality of nanowire architectures is evidenced by the morphological characteristics and hybrid edge-on and face-on molecular packing with high crystallinity. On the basis of these high-quality nanowire arrays, photodetectors with a responsivity of 84.7 A W -1 and detectivity of >10 12 Jones are realized. Our results provide a platform for integration of high-quality polymer architectures for use in high-performance optoelectronic devices.

Original languageEnglish
Pages (from-to)15829-15836
Number of pages8
JournalACS Applied Materials & Interfaces
Volume11
Issue number17
DOIs
Publication statusPublished - 1 May 2019
Externally publishedYes

Keywords

  • conjugated polymer
  • high crystallinity
  • nanowire arrays
  • patterning
  • photodetector

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