Molecular modification of 2,7-diphenyl[1]benzothieno[3,2-b]benzothiophene (DPh-BTBT) with diarylamino substituents: From crystalline order to amorphous state in evaporated thin films

Takafumi Izawa, Hiroki Mori, Yusuke Shinmura, Masahito Iwatani, Eigo Miyazaki, Kazuo Takimiya, Hsio Wen Hung, Masayuki Yahiro, Chihaya Adachi

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Introduction of diarylamino substituents on 2,7-dipheny][1]-benzothieno[3, 2-b]benzothiophene (DPh-BTBT) caused morphological change in the evaporated thin-film state: from highly crystalline films with edge-on molecular orientation for DPh-BTBT to amorphous films for the diarylamino derivatives. The former was unsuitable as a hole-transporting layer in organic light-emitting diodes (OLEDs), whereas the latter acted as a superior hole-transporting layer in multilayered OLEDs.

Original languageEnglish
Pages (from-to)420-421
Number of pages2
JournalChemistry Letters
Issue number5
Publication statusPublished - 2009
Externally publishedYes


ASJC Scopus subject areas

  • Chemistry(all)

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