Omar, Azimah and Fakir, Muhamad Saipul and Hamdan, Khairus Syifa and Rased, Nurul Hidayah and Rahim, Nasrudin Abd (2020) Chemical, optical and photovoltaic properties of TiO2/reduced graphene oxide photoanodes sensitized with Roselle and N719 dyes for dye-sensitized solar cell application. Pigment & Resin Technology, 49 (4). pp. 315-324. ISSN 0369-9420, DOI https://doi.org/10.1108/PRT-08-2019-0072.
Full text not available from this repository.Abstract
Purpose: The purpose of this paper is to investigate the chemical, optical and photovoltaic properties of titanium dioxide/reduced graphene oxide (TiO2/rGO) photoanodes immersed in natural Roselle and synthetic (N719) dyes for dye-sensitized solar cell (DSSC) application. Design/methodology/approach: TiO2 mixed with rGO were doctor-bladed on fluorine doped tin oxide (FTO) glass substrate. The chemical and optical properties of TiO2/rGO photoanodes immersed in Roselle and N719 dyes were characterized using Fourier-transformed infrared (FTIR) and ultraviolet–visible (UV–vis) spectroscopies, respectively. The DSSC’s photovoltaic performances were tested using Visiontec Solar I-V tester at standard illumination of AM1.5 and irradiance level of 100 mW/cm2. Findings: The presence of anthocyanin dye from Roselle flower was detected at 604 nm and 718 nm. TiO2/rGO+Roselle dye sample revealed the smallest energy gap of 0.17 eV for ease of electron movement from valence band to conduction band. The TiO2/rGO-based DSSC fabricated with Roselle dye had a power conversion efficiency, ƞ of 0.743 per cent higher than TiO2/rGO photoanode sensitized with N719 dye (0.334 per cent). The obtained J-V curves were analyzed by a single-diode model of Lambert W-function and manual optimization to determine the internal electrical parameters of the DSSC. The average and uncertainty values of Jsc and ƞ were evaluated at different Rsh range of 1362 Ω to 32 k Ω. Research limitations/implications: Rs values were kept constant during optimization work. Originality/value: New ideality factor of TiO2/rGO-based DSSC was re-determined around 0.9995. © 2020, Emerald Publishing Limited.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Dye-sensitized solar cell; Photovoltaic; Reduced graphene oxide; Roselle; Single-diode model |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > UM Power Energy Dedicated Advanced Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 25 Aug 2020 08:44 |
| Last Modified: | 25 Aug 2020 08:44 |
| URI: | http://eprints.um.edu.my/id/eprint/25458 |
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