Approaches for Selective Synthesis of Ullazine Donor–Acceptor Systems

Nikita A. Drigo, Sanghyun Paek, Aron J. Huckaba, Pascal A. Schouwink, Nouar Tabet, Mohammad K. Nazeeruddin

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6 Citations (Scopus)


Methods for effective synthesis for the four possible isomeric 3,9-diphenylullazine carboxaldehydes and reactive halogen intermediates are described. Ullazine donor–acceptor (D–A) dyes were studied using UV/Vis, photoluminescence (PL) spectroscopy and cyclic voltammetry. X-ray single crystal diffraction analysis independently confirmed the structures of two key intermediates. A D–A dye based on ullazine with dihexylmalonate acceptor was tested as a dopant-free hole-transporting material (HTM) in a perovskite solar cell, exhibiting promising power conversion efficiency (PCE) reaching 13.07 %.

Original languageEnglish
Pages (from-to)17209-17212
Number of pages4
JournalChemistry - A European Journal
Issue number68
Publication statusPublished - 6 Dec 2017



  • donor–acceptor systems
  • heterocycles
  • perovskites
  • polycycles
  • solar cells

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Drigo, N. A., Paek, S., Huckaba, A. J., Schouwink, P. A., Tabet, N., & Nazeeruddin, M. K. (2017). Approaches for Selective Synthesis of Ullazine Donor–Acceptor Systems. Chemistry - A European Journal, 23(68), 17209-17212.