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

2 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

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Amines
Cations
Positive ions
Doping (additives)
Hole mobility
Oxidants
Conversion efficiency
Durability
Molecules
Perovskite solar cells

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Oxoammonium cation of 2,2,6,6-tetramethylpiperidin-1-oxyl : A very efficient dopant for hole-transporting triaryl amines in a perovskite solar cell. / Maruo, H.; Tanaka, S.; Takamura, M.; Oyaizu, Kenichi; Segawa, H.; Nishide, Hiroyuki.

In: MRS Communications, Vol. 8, No. 1, 01.03.2018, p. 122-126.

Research output: Contribution to journalArticle

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