Oxoammonium cation of 2,2,6,6-tetramethylpiperidin-1-oxyl: A very efficient dopant for hole-transporting triaryl amines in a perovskite solar cell

H. Maruo, S. Tanaka, M. Takamura, Kenichi Oyaizu, H. Segawa, Hiroyuki Nishide

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Oxoammonium cation of 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) was used as an oxidizing dopant of triaryl amines to efficiently and almost quantitatively generate radical cations of the amines or a hole carrier. The doped-triaryl amines yielded an amorphous and homogeneous layer without any residual oxidant or neutral TEMPO molecule through its sublimination or warming the layer. The TEMPO cation-doped spiro-OMeTAD [tetrakis(dimethoxyphenylamine)spirobifluorene] produced a high hole mobility of 2 × 10-4 cm2/Vs. The perovskite solar cell fabricated with the TEMPO cation-doped or residual dopant-free spiro-OMeTAD as the hole-transporting layer displayed a photo-conversion efficiency of 20.1% with durability.

Original languageEnglish
Pages (from-to)122-126
Number of pages5
JournalMRS Communications
Volume8
Issue number1
DOIs
Publication statusPublished - 2018 Mar 1

    Fingerprint

ASJC Scopus subject areas

  • Materials Science(all)

Cite this