Nitroxide radicals for highly efficient redox mediation in dye-sensitized solar cells

Fumiaki Kato; Naoki Hayashi; Takaya Murakami; Chie Okumura; Kenichi Oyaizu; Hiroyuki Nishide

doi:10.1246/Cl.2010.464

Nitroxide radicals for highly efficient redox mediation in dye-sensitized solar cells

Fumiaki Kato, Naoki Hayashi, Takaya Murakami, Chie Okumura, Kenichi Oyaizu, Hiroyuki Nishide^*

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

54 Citations (Scopus)

Abstract

A robust nitroxide radical, 2,2,6,6-tetramethylpiperidine-loxyl (TEMPO) and its 4-subsituted derivatives (R-TEMPO) exhibit electrochemically reversible redox properties with tunable half-wave potentials (£1/2) based on the substituent effect. Dye-sensitized solar cells using R-TEMPO as mediators with electron-withdrawing R groups showed significantly enhanced photovoltages compared with those obtained using iodides. The linearity between the open-circuit voltage (Vac) and £i/2 revealed that V00 was dominated by the energy gap between the Fermi level of TiO2 and the SOMO level of R-TEMPO.

Original language	English
Pages (from-to)	464-465
Number of pages	2
Journal	Chemistry Letters
Volume	39
Issue number	5
DOIs	https://doi.org/10.1246/Cl.2010.464
Publication status	Published - 2010 May 3

ASJC Scopus subject areas

Chemistry(all)

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abstract = "A robust nitroxide radical, 2,2,6,6-tetramethylpiperidine-loxyl (TEMPO) and its 4-subsituted derivatives (R-TEMPO) exhibit electrochemically reversible redox properties with tunable half-wave potentials (£1/2) based on the substituent effect. Dye-sensitized solar cells using R-TEMPO as mediators with electron-withdrawing R groups showed significantly enhanced photovoltages compared with those obtained using iodides. The linearity between the open-circuit voltage (Vac) and £i/2 revealed that V00 was dominated by the energy gap between the Fermi level of TiO2 and the SOMO level of R-TEMPO.",

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T1 - Nitroxide radicals for highly efficient redox mediation in dye-sensitized solar cells

AU - Kato, Fumiaki

AU - Hayashi, Naoki

AU - Murakami, Takaya

AU - Okumura, Chie

AU - Oyaizu, Kenichi

AU - Nishide, Hiroyuki

PY - 2010/5/3

Y1 - 2010/5/3

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AB - A robust nitroxide radical, 2,2,6,6-tetramethylpiperidine-loxyl (TEMPO) and its 4-subsituted derivatives (R-TEMPO) exhibit electrochemically reversible redox properties with tunable half-wave potentials (£1/2) based on the substituent effect. Dye-sensitized solar cells using R-TEMPO as mediators with electron-withdrawing R groups showed significantly enhanced photovoltages compared with those obtained using iodides. The linearity between the open-circuit voltage (Vac) and £i/2 revealed that V00 was dominated by the energy gap between the Fermi level of TiO2 and the SOMO level of R-TEMPO.

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Nitroxide radicals for highly efficient redox mediation in dye-sensitized solar cells

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