A low molecular mass organogelator electrolyte with TiO2 nanoparticles for stable and efficient quasi-solid-state dye sensitized solar cells

Wubshet Mekonnen Girma, Chia Hung Chen, Cheng Hsien Yang, Po I. Wang, Keng Liang Ou, Der Jang Liaw, Jia Yaw Chang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We report stable and efficient quasi-solid-state dye-sensitized solar cells (QS-DSSCs) fabricated using a combination of TiO2 nanoparticles and a low-molecular-mass organogelator (LMOG) as a nanoparticle-gel composite electrolyte. Three types of electrolyte, namely liquid, LMOG-based gel, and nanoparticle-gel composite, are used. The results of electrochemical impedance spectroscopy and intensity-modulated photocurrent/photovoltage spectroscopy measurements suggest that the presence of TiO2 nanoparticles in the nanoparticle-gel composite electrolyte could afford faster electron transport and a longer electron recombination time compared to the liquid and LMOG-based gel electrolytes. The QS-DSSC using the nanoparticle-gel composite electrolyte with the optimal TiO2 content exhibits a power conversion efficiency of 7.79%, which is significantly higher than that of devices using the liquid (7.22%) and LMOG-based gel (7.21%) electrolytes. Remarkably, the QS-DSSCs with the optimal nanoparticle-gel composite electrolyte exhibit long-term stability over 10 days, unlike the liquid electrolyte-based cells.

Original languageEnglish
Pages (from-to)7671-7678
Number of pages8
JournalRSC Advances
Volume7
Issue number13
DOIs
Publication statusPublished - 2017

Fingerprint

Molecular mass
Electrolytes
Gels
Nanoparticles
Composite materials
Liquids
Dye-sensitized solar cells
Photocurrents
Electrochemical impedance spectroscopy
Conversion efficiency
Spectroscopy
Electrons

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

A low molecular mass organogelator electrolyte with TiO2 nanoparticles for stable and efficient quasi-solid-state dye sensitized solar cells. / Girma, Wubshet Mekonnen; Chen, Chia Hung; Yang, Cheng Hsien; Wang, Po I.; Ou, Keng Liang; Liaw, Der Jang; Chang, Jia Yaw.

In: RSC Advances, Vol. 7, No. 13, 2017, p. 7671-7678.

Research output: Contribution to journalArticle

Girma, Wubshet Mekonnen ; Chen, Chia Hung ; Yang, Cheng Hsien ; Wang, Po I. ; Ou, Keng Liang ; Liaw, Der Jang ; Chang, Jia Yaw. / A low molecular mass organogelator electrolyte with TiO2 nanoparticles for stable and efficient quasi-solid-state dye sensitized solar cells. In: RSC Advances. 2017 ; Vol. 7, No. 13. pp. 7671-7678.
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AU - Yang, Cheng Hsien

AU - Wang, Po I.

AU - Ou, Keng Liang

AU - Liaw, Der Jang

AU - Chang, Jia Yaw

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AB - We report stable and efficient quasi-solid-state dye-sensitized solar cells (QS-DSSCs) fabricated using a combination of TiO2 nanoparticles and a low-molecular-mass organogelator (LMOG) as a nanoparticle-gel composite electrolyte. Three types of electrolyte, namely liquid, LMOG-based gel, and nanoparticle-gel composite, are used. The results of electrochemical impedance spectroscopy and intensity-modulated photocurrent/photovoltage spectroscopy measurements suggest that the presence of TiO2 nanoparticles in the nanoparticle-gel composite electrolyte could afford faster electron transport and a longer electron recombination time compared to the liquid and LMOG-based gel electrolytes. The QS-DSSC using the nanoparticle-gel composite electrolyte with the optimal TiO2 content exhibits a power conversion efficiency of 7.79%, which is significantly higher than that of devices using the liquid (7.22%) and LMOG-based gel (7.21%) electrolytes. Remarkably, the QS-DSSCs with the optimal nanoparticle-gel composite electrolyte exhibit long-term stability over 10 days, unlike the liquid electrolyte-based cells.

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