Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes

Sanjay Kumar Swami; Neha Chaturvedi; Anuj Kumar; Raman Kapoor; Viresh Dutta; Julien Frey; Thomas Moehl; Michael Grätzel; Simon Mathew; Mohammad Khaja Nazeeruddin

doi:10.1016/j.jpowsour.2014.11.003

Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes

Sanjay Kumar Swami, Neha Chaturvedi, Anuj Kumar, Raman Kapoor, Viresh Dutta, Julien Frey, Thomas Moehl, Michael Grätzel, Simon Mathew, Mohammad Khaja Nazeeruddin

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

65 Scopus citations

Abstract

Cobalt sulphide (CoS) films are potentiodynamically deposited on fluorine-doped tin oxide (FTO) coated glass substrates employing one, three and five sweep cycles (CoS-I, CoS-III and CoS-V respectively). Analysis of the CoS-III film by impedance spectroscopy reveals a lower charge transfer resistance (R_CT) than that measured for Pt CE (0.75 ω cm^-2 and 0.85 ω cm^-2, respectively). The CoS films are used as counter electrodes (CE) in dye-sensitized solar cells (DSSCs) featuring the combination of a high absorption coefficient organic dye (C218) and the cobalt-based redox electrolyte [Co(bpy)₃]^2/3+. DSSCs fabricated with the CoS-III CE yield the highest short-circuit current density (J_SC) of 12.84 mA cm^-2, open circuit voltage (V_OC) of 805 mV and overall power conversion efficiency (PCE) of 6.72% under AM 1.5G illumination (100 mW cm^-2). These values are comparable to the performance of an analogous cell fabricated with the Pt CE (PCE = 6.94%). Owing to relative lower cost (due to the inherit earth abundance of Co) and non-toxicity, CoS can be considered as a promising alternative to the more expensive Pt as a CE material for next-generation DSSCs that utilize organic dyes and cobalt-based redox electrolytes.

Original language	English
Pages (from-to)	80-89
Number of pages	10
Journal	Journal of Power Sources
Volume	275
DOIs	https://doi.org/10.1016/j.jpowsour.2014.11.003
State	Published - 1 Feb 2015
Externally published	Yes

Keywords

Cobalt electrolyte
Cobalt sulphide
Counter electrode
Dye sensitized solar cell
Organic dye

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2014.11.003

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Swami, S. K., Chaturvedi, N., Kumar, A., Kapoor, R., Dutta, V., Frey, J., Moehl, T., Grätzel, M., Mathew, S., & Nazeeruddin, M. K. (2015). Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes. Journal of Power Sources, 275, 80-89. https://doi.org/10.1016/j.jpowsour.2014.11.003

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title = "Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes",

abstract = "Cobalt sulphide (CoS) films are potentiodynamically deposited on fluorine-doped tin oxide (FTO) coated glass substrates employing one, three and five sweep cycles (CoS-I, CoS-III and CoS-V respectively). Analysis of the CoS-III film by impedance spectroscopy reveals a lower charge transfer resistance (RCT) than that measured for Pt CE (0.75 ω cm-2 and 0.85 ω cm-2, respectively). The CoS films are used as counter electrodes (CE) in dye-sensitized solar cells (DSSCs) featuring the combination of a high absorption coefficient organic dye (C218) and the cobalt-based redox electrolyte [Co(bpy)3]2/3+. DSSCs fabricated with the CoS-III CE yield the highest short-circuit current density (JSC) of 12.84 mA cm-2, open circuit voltage (VOC) of 805 mV and overall power conversion efficiency (PCE) of 6.72% under AM 1.5G illumination (100 mW cm-2). These values are comparable to the performance of an analogous cell fabricated with the Pt CE (PCE = 6.94%). Owing to relative lower cost (due to the inherit earth abundance of Co) and non-toxicity, CoS can be considered as a promising alternative to the more expensive Pt as a CE material for next-generation DSSCs that utilize organic dyes and cobalt-based redox electrolytes.",

keywords = "Cobalt electrolyte, Cobalt sulphide, Counter electrode, Dye sensitized solar cell, Organic dye",

author = "Swami, {Sanjay Kumar} and Neha Chaturvedi and Anuj Kumar and Raman Kapoor and Viresh Dutta and Julien Frey and Thomas Moehl and Michael Gr{\"a}tzel and Simon Mathew and Nazeeruddin, {Mohammad Khaja}",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = feb,

day = "1",

doi = "10.1016/j.jpowsour.2014.11.003",

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Swami, SK, Chaturvedi, N, Kumar, A, Kapoor, R, Dutta, V, Frey, J, Moehl, T, Grätzel, M, Mathew, S & Nazeeruddin, MK 2015, 'Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes', Journal of Power Sources, vol. 275, pp. 80-89. https://doi.org/10.1016/j.jpowsour.2014.11.003

Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes. / Swami, Sanjay Kumar; Chaturvedi, Neha; Kumar, Anuj et al.
In: Journal of Power Sources, Vol. 275, 01.02.2015, p. 80-89.

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

TY - JOUR

T1 - Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes

AU - Swami, Sanjay Kumar

AU - Chaturvedi, Neha

AU - Kumar, Anuj

AU - Kapoor, Raman

AU - Dutta, Viresh

AU - Frey, Julien

AU - Moehl, Thomas

AU - Grätzel, Michael

AU - Mathew, Simon

AU - Nazeeruddin, Mohammad Khaja

PY - 2015/2/1

Y1 - 2015/2/1

N2 - Cobalt sulphide (CoS) films are potentiodynamically deposited on fluorine-doped tin oxide (FTO) coated glass substrates employing one, three and five sweep cycles (CoS-I, CoS-III and CoS-V respectively). Analysis of the CoS-III film by impedance spectroscopy reveals a lower charge transfer resistance (RCT) than that measured for Pt CE (0.75 ω cm-2 and 0.85 ω cm-2, respectively). The CoS films are used as counter electrodes (CE) in dye-sensitized solar cells (DSSCs) featuring the combination of a high absorption coefficient organic dye (C218) and the cobalt-based redox electrolyte [Co(bpy)3]2/3+. DSSCs fabricated with the CoS-III CE yield the highest short-circuit current density (JSC) of 12.84 mA cm-2, open circuit voltage (VOC) of 805 mV and overall power conversion efficiency (PCE) of 6.72% under AM 1.5G illumination (100 mW cm-2). These values are comparable to the performance of an analogous cell fabricated with the Pt CE (PCE = 6.94%). Owing to relative lower cost (due to the inherit earth abundance of Co) and non-toxicity, CoS can be considered as a promising alternative to the more expensive Pt as a CE material for next-generation DSSCs that utilize organic dyes and cobalt-based redox electrolytes.

AB - Cobalt sulphide (CoS) films are potentiodynamically deposited on fluorine-doped tin oxide (FTO) coated glass substrates employing one, three and five sweep cycles (CoS-I, CoS-III and CoS-V respectively). Analysis of the CoS-III film by impedance spectroscopy reveals a lower charge transfer resistance (RCT) than that measured for Pt CE (0.75 ω cm-2 and 0.85 ω cm-2, respectively). The CoS films are used as counter electrodes (CE) in dye-sensitized solar cells (DSSCs) featuring the combination of a high absorption coefficient organic dye (C218) and the cobalt-based redox electrolyte [Co(bpy)3]2/3+. DSSCs fabricated with the CoS-III CE yield the highest short-circuit current density (JSC) of 12.84 mA cm-2, open circuit voltage (VOC) of 805 mV and overall power conversion efficiency (PCE) of 6.72% under AM 1.5G illumination (100 mW cm-2). These values are comparable to the performance of an analogous cell fabricated with the Pt CE (PCE = 6.94%). Owing to relative lower cost (due to the inherit earth abundance of Co) and non-toxicity, CoS can be considered as a promising alternative to the more expensive Pt as a CE material for next-generation DSSCs that utilize organic dyes and cobalt-based redox electrolytes.

KW - Cobalt electrolyte

KW - Cobalt sulphide

KW - Counter electrode

KW - Dye sensitized solar cell

KW - Organic dye

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U2 - 10.1016/j.jpowsour.2014.11.003

DO - 10.1016/j.jpowsour.2014.11.003

M3 - Article

AN - SCOPUS:84910615922

SN - 0378-7753

VL - 275

SP - 80

EP - 89

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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