The 2,2,6,6-tetramethyl-l-piperidinyloxy radical: An efficient, iodine-free redox mediator for dye-sensitized solar cells

Zhipan Zhang; Peter Chen; Takurou N. Murakami; Shaik M. Zakeeruddin; Michael Grätzel

doi:10.1002/adfm.200701041

The 2,2,6,6-tetramethyl-l-piperidinyloxy radical: An efficient, iodine-free redox mediator for dye-sensitized solar cells

Zhipan Zhang^*
, Peter Chen
, Takurou N. Murakami
, Shaik M. Zakeeruddin
, Michael Grätzel

^*Corresponding author for this work

Swiss Federal Institute of Technology Lausanne

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

262 Citations (Scopus)

Abstract

A promising redox system, offering an alternative to the widely used iodide/triiodide couple, based on the stable organic radical 2,2,6,6-tetramethyl-1-piperidinytoxy (TEMPO) has been employed in dye-sensitized solar cells. The photovoltaic performance of this new redox couple has been evaluated by employing nanocrystalline TiO₂ films with different thickness. Judicious selections of a 5.0 μm photoanode made from TiO ₂ mesoscopic particles and an organic sensitizer with a high molar extinction coefficient yield an overall sokr-to-electric power conversion efficiency of 5.4 % under AM 1.5 illumination at 100 mW cm^-2, which is unprecedented for an iodine-free mediator system.

Original language	English
Pages (from-to)	341-346
Number of pages	6
Journal	Advanced Functional Materials
Volume	18
Issue number	2
DOIs	https://doi.org/10.1002/adfm.200701041
Publication status	Published - 24 Jan 2008
Externally published	Yes

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title = "The 2,2,6,6-tetramethyl-l-piperidinyloxy radical: An efficient, iodine-free redox mediator for dye-sensitized solar cells",

abstract = "A promising redox system, offering an alternative to the widely used iodide/triiodide couple, based on the stable organic radical 2,2,6,6-tetramethyl-1-piperidinytoxy (TEMPO) has been employed in dye-sensitized solar cells. The photovoltaic performance of this new redox couple has been evaluated by employing nanocrystalline TiO2 films with different thickness. Judicious selections of a 5.0 μm photoanode made from TiO 2 mesoscopic particles and an organic sensitizer with a high molar extinction coefficient yield an overall sokr-to-electric power conversion efficiency of 5.4 \% under AM 1.5 illumination at 100 mW cm-2, which is unprecedented for an iodine-free mediator system.",

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AU - Zhang, Zhipan

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AU - Murakami, Takurou N.

AU - Zakeeruddin, Shaik M.

AU - Grätzel, Michael

PY - 2008/1/24

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AB - A promising redox system, offering an alternative to the widely used iodide/triiodide couple, based on the stable organic radical 2,2,6,6-tetramethyl-1-piperidinytoxy (TEMPO) has been employed in dye-sensitized solar cells. The photovoltaic performance of this new redox couple has been evaluated by employing nanocrystalline TiO2 films with different thickness. Judicious selections of a 5.0 μm photoanode made from TiO 2 mesoscopic particles and an organic sensitizer with a high molar extinction coefficient yield an overall sokr-to-electric power conversion efficiency of 5.4 % under AM 1.5 illumination at 100 mW cm-2, which is unprecedented for an iodine-free mediator system.

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ER -

The 2,2,6,6-tetramethyl-l-piperidinyloxy radical: An efficient, iodine-free redox mediator for dye-sensitized solar cells

Abstract

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