Precise Patterning of Organic Single Crystals via Capillary-Assisted Alternating-Electric Field

Yedong Zhang, Jiansheng Jie, Yuning Sun, Seok Gy Jeon, Xiujuan Zhang, Gaole Dai, Cheol Jin Lee, Xiaohong Zhang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Owing to the extraordinary properties, organic micro/nanocrystals are important building blocks for future low-cost and high-performance organic electronic devices. However, integrated device application of the organic micro/nanocrystals is hampered by the difficulty in high-throughput, high-precision patterning of the micro/nanocrystals. In this study, the authors demonstrate, for the first time, a facile capillary-assisted alternating-electric field method for the large-scale assembling and patterning of both 0D and 1D organic crystals. These crystals can be precisely patterned at the photolithography defined holes/channels at the substrate with the yield up to 95% in 1 mm2. The mechanism of assembly kinetics is systematically studied by the electric field distribution simulation and experimental investigations. By using the strategy, various organic micro/nanocrystal patterns are obtained by simply altering the geometries of the photoresist patterns on substrates. Moreover, ultraviolet photodetectors based on the patterned Alq3 micro/nanocrystals exhibit visible-blind photoresponse with high sensitivity as well as excellent stability and reproducibility. This work paves the way toward high-integration, high-performance organic electronic, and optoelectronic devices from the organic micro/nanocrystals.

Original languageEnglish
JournalSmall
DOIs
Publication statusAccepted/In press - 2017

Keywords

  • Alternating-electric field
  • Capillary force
  • Organic single crystals
  • Precise patterning
  • UV photodetectors

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Engineering (miscellaneous)

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