Hydrothermal duration effect on the self-assembled TiO2 photo-anode for DSSC application


Yeoh, Mian En and Chan, Kah Yoong and Wong, Hin Yong and Low, Pei Ling and Thien, Gregory Soon How and Ng, Zi Neng and Ananda Murthy, Hanabe Chowdappa and Balachandran, Ruthramurthy (2023) Hydrothermal duration effect on the self-assembled TiO2 photo-anode for DSSC application. Optical Materials, 141. p. 113907. ISSN 0925-3467

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Dye-sensitized solar cell (DSSC) has been extensively researched over the past few decades due to its facile and low-cost fabrication process compared to the silicon solar cell. Generally, the photo-anode of the DSSC consists of a titanium dioxide (TiO2) film deposited on a transparent conducting oxide (TCO) substrate. Hydrothermal method is the most widely adopted technique for the synthesis of TiO2 photo-anode. Nevertheless, the optimum hydrothermal synthesis parameters have yet to be elucidated. In this work, the influences of hydrothermal duration on the self-assembled TiO2 photo-anode were investigated. It was discovered that the rutile content in the TiO2 photo-anodes can be controlled by adjusting the hydrothermal durations. The highest DSSC efficiency of 3.88% was achieved at an optimum hydrothermal duration of 10 h, corresponding to a rutile content of 80.43%. The improvement in DSSC efficiency can be ascribed to the reduced electron-hole recombination resulting from electron transfer from rutile to anatase lattice trapping sites, thereby improving the photocurrent. However, when the hydrothermal durations exceeded 10 h, the DSSC efficiency dropped due to the agglomeration of the rutile TiO2 resulted from excessive rutile content, which led to decreased surface area for dye adsorption and hence lower photocurrent. The results suggest the importance of controlling the hydrothermal duration on the synthesis of TiO2 photo-anode.

Item Type: Article
Uncontrolled Keywords: Hydrothermal, energy consumption, optics
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics > TK8300-8360 Photoelectronic devices (General)
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 03 Jul 2023 03:37
Last Modified: 03 Jul 2023 03:37
URII: http://shdl.mmu.edu.my/id/eprint/11483


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