Bagheri, Nafiseh and Hassanzadeh, Javad and Al-Ruqeishi, Zainab B. B. and Abdul Manan, Ninie Suhana and Al Lawati, Haider A. J. and Abou-Zied, Osama K. K. (2023) AuNRs attached TiO2 NPs modified by cobalt-imidazolate frameworks as exceptional materials to improve the energy conversion efficiency of dye-sensitized solar cells. Physical Chemistry Chemical Physics, 25 (28). pp. 19230-19238. ISSN 1463-9076, DOI https://doi.org/10.1039/d3cp01576a.
Full text not available from this repository.Abstract
This work reports a significant improvement in both the open-circuit voltage (V-OC) and current density (J) of dye-sensitized solar cells (DSSCs) using gold nanorod-modified TiO2 nanoparticles (TiO2/AuNRs) together with a cobalt-imidazolate framework (ZIF-67) as an efficient photoanode. It was demonstrated that adding ZIF-67 (8 wt%) to TiO2 NPs increased the V-OC by 160 mV and J by 2.5 times. This observation was described based on the significant increase in the amount of adsorbed dye in the presence of highly porous ZIF-67, which boosts the photoanode's light harvesting. Modifying TiO2 NPs with AuNRs also caused a remarkable enhancement in J (& SIM; 2.8 times), which can be explained via electron transfer between the TiO2 conduction band and AuNRs. It can result in a more efficient inhibiting effect on the interfacial charge recombination processes in TiO2/AuNRs/ZIF-67 because of the formation of a Schottky barrier at the interface between TiO2 and Au. These effects were confirmed by the reduction in the photoluminescence intensity of TiO2 in the presence of AuNRs. More reduction in the photoluminescence intensity was observed when ZIF-67 was added. The prepared photoanode showed an outstanding improvement in the overall efficiency of the DSSC (& eta;) to 8.38% compared to the bare TiO2-based photoanode (1.83%). The notable improvement in the TiO2/AuNRs/ZIF-67 performance confirmed its practicality for high-efficiency DSSCs.
| Item Type: | Article |
|---|---|
| Funders: | Sultan Qaboos University [Grant No: SR/SCI/CHEM/18/01] |
| Uncontrolled Keywords: | Open-circuit voltage (V-OC); Adsorbed dye; Schottky barrier |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 11 Oct 2025 04:39 |
| Last Modified: | 11 Oct 2025 04:39 |
| URI: | http://eprints.um.edu.my/id/eprint/48232 |
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