Mr. Mohammad Malik Afandi Profile

Mohammad Malik Afandi

at Pukyong National Univ

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Proceedings Article | 1 April 2022 Presentation

Dual-mode UVA electroluminescent and photo-detecting device based on ZnGa2O4 oxide of MOS structure

Mohammad Malik Afandi, GyeongDo Baek, Hyunjee Jung, Je Hong Park, JongSu Kim

Proceedings Volume PC11995, PC1199508 (2022) https://doi.org/10.1117/12.2608498

KEYWORDS: Photodetectors, Sol-gels, Annealing, Absorbance

Read Abstract +

The ultraviolet-A (UVA) emitting and the solar-blind photo-detecting device was successfully demonstrated by the ZnGa2O4 oxide layer in a metal-oxide-semiconductor (MOS) structure. The ZnGa2O4 oxide layer was deposited on Si substrate through a facile sol-gel precursor method with optimization of annealing temperatures as a light-emitting and photo-detecting layer. The ITO was deposited by a sputter with a 100 μm stripe pattern for the transparent electrode. It emits the broad UVA light which is attributed to the self-activating ZnGa2O4 and shows an exponential increase and a gradual increase according to the applied voltages and frequencies, respectively. Moreover, it provides a decent response in a photo-detection, especially as a solar-blind photodetector. Finally, we present the UVA photocatalytic effect with an additional TiO2 layer and the photo-detecting response with dark current (Idark) and photocurrent (Iphoto¬) ratio in various conditions.

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