Efficient dye regeneration in solid-state dye-sensitized solar cells fabricated with melt processed hole conductors

Mindaugas Juozapavicius; Brian C. O'Regan; Assaf Y. Anderson; Juozas V. Grazulevicius; Viktorija Mimaite

doi:10.1016/j.orgel.2011.09.024

Efficient dye regeneration in solid-state dye-sensitized solar cells fabricated with melt processed hole conductors

Mindaugas Juozapavicius, Brian C. O'Regan, Assaf Y. Anderson, Juozas V. Grazulevicius, Viktorija Mimaite

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

28 Scopus citations

Abstract

A new method for melting hole transporting materials (HTM) into mesoporous TiO₂ electrodes to obtain solid-state dye-sensitized solar cells (DSSC) is reported. Internal coverage is determined from the efficiency of hole conductor oxidation by photo-oxidized dyes (dye regeneration), measured using transient absorption spectroscopy. High efficiency regeneration indicates complete coverage of the electrode internal surface. A high work function hole conductor (>5.2 eV) was found to give shorter regeneration lifetimes (<1 μs) and better regeneration efficiencies (>90%) than expected. Cell photocurrents were low, but improved after iodine vapor doping of the hole conductor. Counter intuitively, doping also reduced the recombination rate constant 7-fold. A solid state solar cell with power conversion efficiency of 0.075% at 1 sun is reported.

Original language	English
Pages (from-to)	23-30
Number of pages	8
Journal	Organic Electronics
Volume	13
Issue number	1
DOIs	https://doi.org/10.1016/j.orgel.2011.09.024
State	Published - Jan 2012
Externally published	Yes

Bibliographical note

Funding Information:
Xiaoe Li is greatly thanked for assistance. M.J. would like to acknowledge EPSRC for a Plastic Electronic Materials Doctoral Training Center studentship. Financial support by the Research Council of Lithuania (Project No. MIP-64/2010) is gratefully acknowledged.

Funding

Xiaoe Li is greatly thanked for assistance. M.J. would like to acknowledge EPSRC for a Plastic Electronic Materials Doctoral Training Center studentship. Financial support by the Research Council of Lithuania (Project No. MIP-64/2010) is gratefully acknowledged.

Funders	Funder number
the Research Council of Lithuania

Keywords

Dye-sensitized solar cell
Melt-processable
Organic hole transporting material
Transient absorption spectroscopy

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10.1016/j.orgel.2011.09.024

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title = "Efficient dye regeneration in solid-state dye-sensitized solar cells fabricated with melt processed hole conductors",

abstract = "A new method for melting hole transporting materials (HTM) into mesoporous TiO2 electrodes to obtain solid-state dye-sensitized solar cells (DSSC) is reported. Internal coverage is determined from the efficiency of hole conductor oxidation by photo-oxidized dyes (dye regeneration), measured using transient absorption spectroscopy. High efficiency regeneration indicates complete coverage of the electrode internal surface. A high work function hole conductor (>5.2 eV) was found to give shorter regeneration lifetimes (<1 μs) and better regeneration efficiencies (>90%) than expected. Cell photocurrents were low, but improved after iodine vapor doping of the hole conductor. Counter intuitively, doping also reduced the recombination rate constant 7-fold. A solid state solar cell with power conversion efficiency of 0.075% at 1 sun is reported.",

keywords = "Dye-sensitized solar cell, Melt-processable, Organic hole transporting material, Transient absorption spectroscopy",

author = "Mindaugas Juozapavicius and O'Regan, {Brian C.} and Anderson, {Assaf Y.} and Grazulevicius, {Juozas V.} and Viktorija Mimaite",

note = "Funding Information: Xiaoe Li is greatly thanked for assistance. M.J. would like to acknowledge EPSRC for a Plastic Electronic Materials Doctoral Training Center studentship. Financial support by the Research Council of Lithuania (Project No. MIP-64/2010) is gratefully acknowledged. ",

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AU - Grazulevicius, Juozas V.

AU - Mimaite, Viktorija

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AB - A new method for melting hole transporting materials (HTM) into mesoporous TiO2 electrodes to obtain solid-state dye-sensitized solar cells (DSSC) is reported. Internal coverage is determined from the efficiency of hole conductor oxidation by photo-oxidized dyes (dye regeneration), measured using transient absorption spectroscopy. High efficiency regeneration indicates complete coverage of the electrode internal surface. A high work function hole conductor (>5.2 eV) was found to give shorter regeneration lifetimes (<1 μs) and better regeneration efficiencies (>90%) than expected. Cell photocurrents were low, but improved after iodine vapor doping of the hole conductor. Counter intuitively, doping also reduced the recombination rate constant 7-fold. A solid state solar cell with power conversion efficiency of 0.075% at 1 sun is reported.

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Efficient dye regeneration in solid-state dye-sensitized solar cells fabricated with melt processed hole conductors

Abstract

Bibliographical note

Funding

Keywords

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