Dye-sensitized solar cells: investigation of D-A-π-A organic sensitizers based on [1,2,5]selenadiazolo[3,4-c]pyridine

Ekaterina A. Knyazeva; Wenjun Wu; Timofey N. Chmovzh; Neil Robertson; J. Derek Woollins; Oleg A. Rakitin

doi:10.1016/j.solener.2017.01.016

Dye-sensitized solar cells: investigation of D-A-π-A organic sensitizers based on [1,2,5]selenadiazolo[3,4-c]pyridine

Ekaterina A. Knyazeva, Wenjun Wu, Timofey N. Chmovzh, Neil Robertson, J. Derek Woollins, Oleg A. Rakitin

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Abstract

We report two series of D-A-π-A metal-free organic sensitizers for dye-sensitized solar cells (DSSCs) based on triphenylamine and N-hexyl-carbazole as electronic donors, respectively. Through varying auxiliary acceptors and π-spacers, several significant consequences on cell efficiency were identified: (i) a broadened UV-Vis absorption spectrum and low-lying LUMO level with [1,2,5]selenadiazolo [3,4-c] pyridine as auxiliary acceptor; (ii) compensation for the absorption valley around 400 nm in the UV-vis spectra by the introduction of a thiophene unit into the π-bridge; (iii) effective improvement of the power conversion efficiency (PCE) by means of cosensitization, leading to dye OKT-1, 3.10% PCE, increased to 4.19% with squaraine dye SQ2 as co-sensitizer. The design criteria identified have opened the door for further optimization of this new dye family.

Original language	English
Pages (from-to)	134-143
Number of pages	10
Journal	Solar Energy
Volume	144
Early online date	17 Jan 2017
DOIs	https://doi.org/10.1016/j.solener.2017.01.016
Publication status	Published - 1 Mar 2017

Keywords

Dye-sensitized solar cells
[1,2,5]Selenadiazolo[3,4-c] pyridine
Power conversion efficiency
Co-sensitizer

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10.1016/j.solener.2017.01.016

Woollins_2017_SE_Dye-sensitized_AAM
© 2017 Elsevier Ltd. All rights reserved. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: https://doi.org/10.1016/j.solener.2017.01.016
Accepted author manuscript, 976 KB

Chalcogen Nitrogen compounds: Chalcogen Nitrogen Compounds for Electornics and Spintronics
Woollins, J. D. (PI)
The Leverhulme Trust
1/12/12 → 30/11/16
Project: Standard

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@article{1063535855ec46aeb45fa49c3570b77f,

title = "Dye-sensitized solar cells: investigation of D-A-π-A organic sensitizers based on [1,2,5]selenadiazolo[3,4-c]pyridine",

abstract = "We report two series of D-A-π-A metal-free organic sensitizers for dye-sensitized solar cells (DSSCs) based on triphenylamine and N-hexyl-carbazole as electronic donors, respectively. Through varying auxiliary acceptors and π-spacers, several significant consequences on cell efficiency were identified: (i) a broadened UV-Vis absorption spectrum and low-lying LUMO level with [1,2,5]selenadiazolo [3,4-c] pyridine as auxiliary acceptor; (ii) compensation for the absorption valley around 400 nm in the UV-vis spectra by the introduction of a thiophene unit into the π-bridge; (iii) effective improvement of the power conversion efficiency (PCE) by means of cosensitization, leading to dye OKT-1, 3.10% PCE, increased to 4.19% with squaraine dye SQ2 as co-sensitizer. The design criteria identified have opened the door for further optimization of this new dye family. ",

keywords = "Dye-sensitized solar cells, [1,2,5]Selenadiazolo[3,4-c] pyridine, Power conversion efficiency, Co-sensitizer",

author = "Knyazeva, {Ekaterina A.} and Wenjun Wu and Chmovzh, {Timofey N.} and Neil Robertson and Woollins, {J. Derek} and Rakitin, {Oleg A.}",

note = "The authors gratefully acknowledge financial support from the Russian Science Foundation (grant no. 15-13-10022). Wenjun Wu thanks the Scientific Committee of Shanghai (14ZR1409700) for financial support. The authors thank the Leverhulme Trust for an International Network grant.",

year = "2017",

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doi = "10.1016/j.solener.2017.01.016",

language = "English",

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pages = "134--143",

journal = "Solar Energy",

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TY - JOUR

T1 - Dye-sensitized solar cells

T2 - investigation of D-A-π-A organic sensitizers based on [1,2,5]selenadiazolo[3,4-c]pyridine

AU - Knyazeva, Ekaterina A.

AU - Wu, Wenjun

AU - Chmovzh, Timofey N.

AU - Robertson, Neil

AU - Woollins, J. Derek

AU - Rakitin, Oleg A.

N1 - The authors gratefully acknowledge financial support from the Russian Science Foundation (grant no. 15-13-10022). Wenjun Wu thanks the Scientific Committee of Shanghai (14ZR1409700) for financial support. The authors thank the Leverhulme Trust for an International Network grant.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - We report two series of D-A-π-A metal-free organic sensitizers for dye-sensitized solar cells (DSSCs) based on triphenylamine and N-hexyl-carbazole as electronic donors, respectively. Through varying auxiliary acceptors and π-spacers, several significant consequences on cell efficiency were identified: (i) a broadened UV-Vis absorption spectrum and low-lying LUMO level with [1,2,5]selenadiazolo [3,4-c] pyridine as auxiliary acceptor; (ii) compensation for the absorption valley around 400 nm in the UV-vis spectra by the introduction of a thiophene unit into the π-bridge; (iii) effective improvement of the power conversion efficiency (PCE) by means of cosensitization, leading to dye OKT-1, 3.10% PCE, increased to 4.19% with squaraine dye SQ2 as co-sensitizer. The design criteria identified have opened the door for further optimization of this new dye family.

AB - We report two series of D-A-π-A metal-free organic sensitizers for dye-sensitized solar cells (DSSCs) based on triphenylamine and N-hexyl-carbazole as electronic donors, respectively. Through varying auxiliary acceptors and π-spacers, several significant consequences on cell efficiency were identified: (i) a broadened UV-Vis absorption spectrum and low-lying LUMO level with [1,2,5]selenadiazolo [3,4-c] pyridine as auxiliary acceptor; (ii) compensation for the absorption valley around 400 nm in the UV-vis spectra by the introduction of a thiophene unit into the π-bridge; (iii) effective improvement of the power conversion efficiency (PCE) by means of cosensitization, leading to dye OKT-1, 3.10% PCE, increased to 4.19% with squaraine dye SQ2 as co-sensitizer. The design criteria identified have opened the door for further optimization of this new dye family.

KW - Dye-sensitized solar cells

KW - [1,2,5]Selenadiazolo[3,4-c] pyridine

KW - Power conversion efficiency

KW - Co-sensitizer

U2 - 10.1016/j.solener.2017.01.016

DO - 10.1016/j.solener.2017.01.016

M3 - Article

SN - 0038-092X

VL - 144

SP - 134

EP - 143

JO - Solar Energy

JF - Solar Energy

ER -

Dye-sensitized solar cells: investigation of D-A-π-A organic sensitizers based on [1,2,5]selenadiazolo[3,4-c]pyridine

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Chalcogen Nitrogen compounds: Chalcogen Nitrogen Compounds for Electornics and Spintronics

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