A novel efficient, iodide-free redox mediator for dye-sensitized solar cells

Zhipan Zhang; Peter Chaoyu Chen; Shaik Mohammed Zakeeruddin; Jacques Edouard Moser; Michael Grätzel

doi:10.1557/proc-1013-z06-02

A novel efficient, iodide-free redox mediator for dye-sensitized solar cells

Zhipan Zhang^*
, Peter Chaoyu Chen
, Shaik Mohammed Zakeeruddin
, Jacques Edouard Moser
, Michael Grätzel

^*此作品的通讯作者

Swiss Federal Institute of Technology Lausanne

科研成果: 期刊稿件 › 会议文章 › 同行评审

摘要

A stable organic molecular radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), has been electrochemically studied and employed as a new redox mediator in nanocrystalline TiO₂ dye-sensitized solar cells (DSCs) when it is doped with nitrosonium tetrafluoroborate (NOBF₄). Reasonable photocurrents can be achieved despite of driving force of only 0.2 eV for the TEMPO/TEMPO⁺ system as compared to 0.6 eV for the iodide/triiodide redox system. Judicious selections of a 5 μm photoanode made from TiO ₂ mesoscopic particles (60 nm in diameter) and an organic sensitizer with high molar extinction coefficient yield an overall power conversion of 5.0 % under AM 1.5 illumination at 100 mW cm^-2 and an incident photon-to-current conversion efficiencies (IPCE) in excess of 50 %.

源语言	英语
页（从-至）	44-48
页数	5
期刊	Materials Research Society Symposium Proceedings
卷	1013
DOI	https://doi.org/10.1557/proc-1013-z06-02
出版状态	已出版 - 2007
已对外发布	是
活动	Organic and Nanoparticle Hybrid Photovoltaic Devices - 2007 MRS Spring Meeting - San Francisco, CA, 美国期限: 9 4月 2007 → 13 4月 2007

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title = "A novel efficient, iodide-free redox mediator for dye-sensitized solar cells",

abstract = "A stable organic molecular radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), has been electrochemically studied and employed as a new redox mediator in nanocrystalline TiO2 dye-sensitized solar cells (DSCs) when it is doped with nitrosonium tetrafluoroborate (NOBF4). Reasonable photocurrents can be achieved despite of driving force of only 0.2 eV for the TEMPO/TEMPO+ system as compared to 0.6 eV for the iodide/triiodide redox system. Judicious selections of a 5 μm photoanode made from TiO 2 mesoscopic particles (60 nm in diameter) and an organic sensitizer with high molar extinction coefficient yield an overall power conversion of 5.0 \% under AM 1.5 illumination at 100 mW cm-2 and an incident photon-to-current conversion efficiencies (IPCE) in excess of 50 \%.",

author = "Zhipan Zhang and Chen, \{Peter Chaoyu\} and Zakeeruddin, \{Shaik Mohammed\} and Moser, \{Jacques Edouard\} and Michael Gr{\"a}tzel",

year = "2007",

doi = "10.1557/proc-1013-z06-02",

language = "English",

volume = "1013",

pages = "44--48",

journal = "Materials Research Society Symposium Proceedings",

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T1 - A novel efficient, iodide-free redox mediator for dye-sensitized solar cells

AU - Zhang, Zhipan

AU - Chen, Peter Chaoyu

AU - Zakeeruddin, Shaik Mohammed

AU - Moser, Jacques Edouard

AU - Grätzel, Michael

PY - 2007

Y1 - 2007

N2 - A stable organic molecular radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), has been electrochemically studied and employed as a new redox mediator in nanocrystalline TiO2 dye-sensitized solar cells (DSCs) when it is doped with nitrosonium tetrafluoroborate (NOBF4). Reasonable photocurrents can be achieved despite of driving force of only 0.2 eV for the TEMPO/TEMPO+ system as compared to 0.6 eV for the iodide/triiodide redox system. Judicious selections of a 5 μm photoanode made from TiO 2 mesoscopic particles (60 nm in diameter) and an organic sensitizer with high molar extinction coefficient yield an overall power conversion of 5.0 % under AM 1.5 illumination at 100 mW cm-2 and an incident photon-to-current conversion efficiencies (IPCE) in excess of 50 %.

AB - A stable organic molecular radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), has been electrochemically studied and employed as a new redox mediator in nanocrystalline TiO2 dye-sensitized solar cells (DSCs) when it is doped with nitrosonium tetrafluoroborate (NOBF4). Reasonable photocurrents can be achieved despite of driving force of only 0.2 eV for the TEMPO/TEMPO+ system as compared to 0.6 eV for the iodide/triiodide redox system. Judicious selections of a 5 μm photoanode made from TiO 2 mesoscopic particles (60 nm in diameter) and an organic sensitizer with high molar extinction coefficient yield an overall power conversion of 5.0 % under AM 1.5 illumination at 100 mW cm-2 and an incident photon-to-current conversion efficiencies (IPCE) in excess of 50 %.

UR - https://www.scopus.com/pages/publications/70349914392

U2 - 10.1557/proc-1013-z06-02

DO - 10.1557/proc-1013-z06-02

M3 - Conference article

AN - SCOPUS:70349914392

SN - 0272-9172

VL - 1013

SP - 44

EP - 48

JO - Materials Research Society Symposium Proceedings

JF - Materials Research Society Symposium Proceedings

T2 - Organic and Nanoparticle Hybrid Photovoltaic Devices - 2007 MRS Spring Meeting

Y2 - 9 April 2007 through 13 April 2007

ER -

A novel efficient, iodide-free redox mediator for dye-sensitized solar cells

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