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 language | English |
|---|---|
| Pages (from-to) | 141-148 |
| Number of pages | 8 |
| Journal | Journal of Power Sources |
| Volume | 237 |
| DOIs | |
| State | Published - 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)
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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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