Highly efficient solution processed nanorice structured NiS counter electrode for quantum dot sensitized solar cells

Hee Je Kim, Dong Jo Kim, S. Srinivasa Rao, A. Dennyson Savariraj, Soo Kyoung Kim, Min Kyu Son, Chandu V.V.M. Gopi, K. Prabakar

Research output: Contribution to journalArticle

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Abstract

Facile and nano-rice structured nickel sulfide (NiS) thin films were synthesized and utilized as counter electrode (CE) in quantum dot sensitized solar cells (QDSSCs) for polysulfide redox reactions. NiS thin films deposited on fluorine-doped tin oxide substrate results in formation of highly efficient CE for liquid-junction QDSSCs. Under illumination of 1 sun (100 mW cm -2), the QDSSC based NiS CE exhibited power conversion efficiency (η) of 2.97%, which is higher than platinum (1.45%) CE. Electrochemical impedance spectroscopy affirms that high value of η in NiS CE is due to the elevated electro-catalytic activity towards polysulfide electrolyte reduction and also due to the scale-down in the charge transfer resistance (3.16 Ω) at the CE-electrolyte interface.

Original languageEnglish
Pages (from-to)427-432
Number of pages6
JournalElectrochimica Acta
Volume127
DOIs
Publication statusPublished - May 1 2014
Externally publishedYes

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Semiconductor quantum dots
Solar cells
Nickel
Electrodes
Polysulfides
Electrolytes
Thin films
Fluorine
Redox reactions
Platinum
Tin oxides
Electrochemical impedance spectroscopy
Sun
Conversion efficiency
Sulfides
nickel sulfide
Charge transfer
Catalyst activity
Lighting
Liquids

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Highly efficient solution processed nanorice structured NiS counter electrode for quantum dot sensitized solar cells. / Kim, Hee Je; Kim, Dong Jo; Rao, S. Srinivasa; Savariraj, A. Dennyson; Kim, Soo Kyoung; Son, Min Kyu; Gopi, Chandu V.V.M.; Prabakar, K.

In: Electrochimica Acta, Vol. 127, 01.05.2014, p. 427-432.

Research output: Contribution to journalArticle

Kim, Hee Je ; Kim, Dong Jo ; Rao, S. Srinivasa ; Savariraj, A. Dennyson ; Kim, Soo Kyoung ; Son, Min Kyu ; Gopi, Chandu V.V.M. ; Prabakar, K. / Highly efficient solution processed nanorice structured NiS counter electrode for quantum dot sensitized solar cells. In: Electrochimica Acta. 2014 ; Vol. 127. pp. 427-432.
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abstract = "Facile and nano-rice structured nickel sulfide (NiS) thin films were synthesized and utilized as counter electrode (CE) in quantum dot sensitized solar cells (QDSSCs) for polysulfide redox reactions. NiS thin films deposited on fluorine-doped tin oxide substrate results in formation of highly efficient CE for liquid-junction QDSSCs. Under illumination of 1 sun (100 mW cm -2), the QDSSC based NiS CE exhibited power conversion efficiency (η) of 2.97{\%}, which is higher than platinum (1.45{\%}) CE. Electrochemical impedance spectroscopy affirms that high value of η in NiS CE is due to the elevated electro-catalytic activity towards polysulfide electrolyte reduction and also due to the scale-down in the charge transfer resistance (3.16 Ω) at the CE-electrolyte interface.",
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AU - Kim, Dong Jo

AU - Rao, S. Srinivasa

AU - Savariraj, A. Dennyson

AU - Kim, Soo Kyoung

AU - Son, Min Kyu

AU - Gopi, Chandu V.V.M.

AU - Prabakar, K.

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