Stackable spectral-sensitive conductive films based on cyanine aggregates via an inkjet method

Tokuma Nakamichi, Yu Yang, Tomoya Ohta, Hiroaki Yoshioka, Masayuki Yahiro, Masanao Era, Hirofumi Watanabe, Yuanjing Cui, Yuji Oki, Guodong Qian

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


In this work, wavelength sensitive organic bulk-hetero photodiodes were fabricated by a piezoelectric inkjet method based on the J-type aggregates of cyanine dye molecules doped into poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) thin films on indium tin oxide anodes. The cyanine dye concentration in the inkjet printed films was optimized and the J-aggregate formation during the drying process was investigated by local absorption spectra. It was found that at lower dye concentrations, not only the J-aggregate formation but also the radiation sensitivities of the films were improved significantly. Moreover, the stacking of the cyanine dye - poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) spots demonstrated the linear increase on the optical density and film thickness without deteriorating the J-aggregate formation, indicating their potential in application as narrow band filters.

Original languageEnglish
Pages (from-to)333-338
Number of pages6
JournalDyes and Pigments
Issue number3
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Process Chemistry and Technology


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