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High performance CdS quantum-dot-sensitized solar cells with Ti-based ceramic materials as catalysts on the counter electrode

  • Min Hsin Yeh
  • , Lu Yin Lin
  • , Chuan Pei Lee
  • , Chen Yu Chou
  • , Keng Wei Tsai
  • , Jiann T.Suen Lin
  • , Kuo Chuan Ho

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Titanium-based ceramic nanoparticles, i.e., titanium nitride nanoparticles (TiN-NPs) and titanium carbide nanoparticles (TiC-NPs), are used on counter electrodes (CEs) for quantum-dot-sensitized solar cells (QDSSCs). The QDSSC with TiC-NPs-CE exhibits the highest solar-to-electricity conversion efficiency (η) of 2.11 ± 0.06%, which is higher than that of the cell with sputtered-Au-CE (1.64 ± 0.06%). This is due to the higher electrocatalytic ability of the TiC-NPs for reducing the polysulfide (S x2-) ions and the lower charge-transfer resistance at the interface of the CE and the electrolyte. Meanwhile, the three-dimensional structure of the Ti-based ceramic materials also acts as an extended charge-transfer surface, which facilitates electron transfer on the CE toward Sx2- ions. Explanations are substantiated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and incident photon-to-current conversion efficiency (IPCE) curves.

Original languageEnglish
Pages (from-to)141-148
Number of pages8
JournalJournal of Power Sources
Volume237
DOIs
StatePublished - 2013

Bibliographical note

Funding Information:
This work was supported in part by the National Science Council of Taiwan , under grant numbers NSC 100-2221-E-002-242-MY2 and NSC 100-3113-E-008-003 . Some of the instruments used in this study were made available through the financial support of the Academia Sinica, Taipei, Taiwan , under grant number AS-100-TP-A05 .

UN SDGs

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

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Keywords

  • Cadmium sulfide
  • Counter electrode
  • Electrocatalytic ability
  • Quantum-dot-sensitized solar cell
  • Ti-based ceramic materials

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