Study of PEDOT and analogous polymer film as back-electron injection barrier and electrical charge storing materials

Iseul Lim, Hoa Thi Bui, Chan Yong Shin, Nabeen K. Shrestha, Chinna Bathula, Taegweon Lee, Yong Young Noh, Sung Hwan Han

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

This work reports on back-electron injection barrier property and electrical charge storing behavior of PEDOT film with and without substituted propylene as terminal group. As a barrier layer, thin polymer film is deposited on TiO2 particles of DSSC using photo-induced polymerization route. The same piece of DSSC device is used before and after deposition of polymer thin-film for studying the influence of interfacial treatment. The propylene substituted PEDOT treatment of the device demonstrates an enhanced power conversion efficiency from 4.31 to 5.96% whereas the unsubstituted PEDOT treated device shows only the power conversion enhancement from 4.54 to 5.31%. This finding suggests the higher barrier performance of the propylene substituted PEDOT for back-electron injections. Unlike the barrier performance, the propylene substituted PEDOT shows poorer electrical charge storing behavior with specific capacitance of 63.47 F g−1 whereas the unsubstituted PEDOT film achieved 96.84 F g−1.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalMaterials Letters
Volume211
DOIs
StatePublished - 15 Jan 2018

Keywords

  • Back-electron injection
  • DSSCs
  • Interfacial treatment
  • PEDOT
  • Terminal group

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