Passivation of nanocrystalline TiO2 junctions by surface adsorbed phosphinate amphiphiles enhances the photovoltaic performance of dye sensitized solar cells

Mingkui Wang; Xin Li; Hong Lin; Peter Pechy; Shaik M. Zakeeruddin; Michael Grätzel

doi:10.1039/b908673k

Passivation of nanocrystalline TiO2 junctions by surface adsorbed phosphinate amphiphiles enhances the photovoltaic performance of dye sensitized solar cells

Mingkui Wang, Xin Li, Hong Lin, Peter Pechy, Shaik M. Zakeeruddin, Michael Grätzel

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

103 Scopus citations

Abstract

We report a new class of molecular insulators that electronically passivate the surface of nanocrystalline titania films for high performance dye sensitized solar cells (DSC). Using electrical impedance measurements we demonstrate that co-adsorption of dineohexyl bis-(3,3-dimethyl-butyl)-phosphinic acid (DINHOP), along with the amphiphilic ruthenium sensitizer Z907Na increased substantially the power output of the cells mainly due to a retardation of interfacial recombination of photo-generated charge carriers. The use of phosphinates as anchoring groups opens up new avenues for modification of the surface by molecular insulators, sensitizers and other electro-active molecules to realize the desired optoelectronic performance of devices based on oxide junctions. © 2009 The Royal Society of Chemistry.

Original language	English (US)
Pages (from-to)	10015
Journal	Dalton Transactions
Issue number	45
DOIs	https://doi.org/10.1039/b908673k
State	Published - 2009
Externally published	Yes

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@article{141c9e49364848fcbbea5504d8c85ca2,

title = "Passivation of nanocrystalline TiO2 junctions by surface adsorbed phosphinate amphiphiles enhances the photovoltaic performance of dye sensitized solar cells",

abstract = "We report a new class of molecular insulators that electronically passivate the surface of nanocrystalline titania films for high performance dye sensitized solar cells (DSC). Using electrical impedance measurements we demonstrate that co-adsorption of dineohexyl bis-(3,3-dimethyl-butyl)-phosphinic acid (DINHOP), along with the amphiphilic ruthenium sensitizer Z907Na increased substantially the power output of the cells mainly due to a retardation of interfacial recombination of photo-generated charge carriers. The use of phosphinates as anchoring groups opens up new avenues for modification of the surface by molecular insulators, sensitizers and other electro-active molecules to realize the desired optoelectronic performance of devices based on oxide junctions. {\textcopyright} 2009 The Royal Society of Chemistry.",

author = "Mingkui Wang and Xin Li and Hong Lin and Peter Pechy and Zakeeruddin, {Shaik M.} and Michael Gr{\"a}tzel",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by the Stanford University KAUST center of Excellency and a grant from the United State Airforce. X. Li thanks the Chinese National Natural Science Foundation (50672041) for a grant to support a 6 months leave at the EPFL during which time his contribution to this work was performed. We thank Dr. Robin Humphry-Baker for fruitful discussions and Pascal Comte for the TiO2 film preparations. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2009",

doi = "10.1039/b908673k",

language = "English (US)",

pages = "10015",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "45",

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TY - JOUR

T1 - Passivation of nanocrystalline TiO2 junctions by surface adsorbed phosphinate amphiphiles enhances the photovoltaic performance of dye sensitized solar cells

AU - Wang, Mingkui

AU - Li, Xin

AU - Lin, Hong

AU - Pechy, Peter

AU - Zakeeruddin, Shaik M.

AU - Grätzel, Michael

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by the Stanford University KAUST center of Excellency and a grant from the United State Airforce. X. Li thanks the Chinese National Natural Science Foundation (50672041) for a grant to support a 6 months leave at the EPFL during which time his contribution to this work was performed. We thank Dr. Robin Humphry-Baker for fruitful discussions and Pascal Comte for the TiO2 film preparations. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2009

Y1 - 2009

N2 - We report a new class of molecular insulators that electronically passivate the surface of nanocrystalline titania films for high performance dye sensitized solar cells (DSC). Using electrical impedance measurements we demonstrate that co-adsorption of dineohexyl bis-(3,3-dimethyl-butyl)-phosphinic acid (DINHOP), along with the amphiphilic ruthenium sensitizer Z907Na increased substantially the power output of the cells mainly due to a retardation of interfacial recombination of photo-generated charge carriers. The use of phosphinates as anchoring groups opens up new avenues for modification of the surface by molecular insulators, sensitizers and other electro-active molecules to realize the desired optoelectronic performance of devices based on oxide junctions. © 2009 The Royal Society of Chemistry.

AB - We report a new class of molecular insulators that electronically passivate the surface of nanocrystalline titania films for high performance dye sensitized solar cells (DSC). Using electrical impedance measurements we demonstrate that co-adsorption of dineohexyl bis-(3,3-dimethyl-butyl)-phosphinic acid (DINHOP), along with the amphiphilic ruthenium sensitizer Z907Na increased substantially the power output of the cells mainly due to a retardation of interfacial recombination of photo-generated charge carriers. The use of phosphinates as anchoring groups opens up new avenues for modification of the surface by molecular insulators, sensitizers and other electro-active molecules to realize the desired optoelectronic performance of devices based on oxide junctions. © 2009 The Royal Society of Chemistry.

UR - http://hdl.handle.net/10754/599147

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U2 - 10.1039/b908673k

DO - 10.1039/b908673k

M3 - Article

C2 - 19904428

SN - 1477-9226

SP - 10015

JO - Dalton Transactions

JF - Dalton Transactions

IS - 45

ER -

Passivation of nanocrystalline TiO2 junctions by surface adsorbed phosphinate amphiphiles enhances the photovoltaic performance of dye sensitized solar cells

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