Exhibiting an improved UV-visible dual-band water-soluble biomaterial-assisted IGZO-based photodetectors

Denice Navat Feria^1*, Feng-Hsuan Hsu¹, Bo-Rui Chen², Chang-Jer Wu², Tai-Yuan Lin¹

¹Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung City 202301, Taiwan
²Department of Food Science, National Taiwan Ocean University, Keelung City 202301, Taiwan

* Presenter:Denice Navat Feria, email:dnferia@mail.ntou.edu.tw

Incorporating biomaterials has demonstrated stable optoelectronic devices like photodetectors (PDs) with biodegradability and biocompatibility properties towards sustainable and extensive applications. The potential of biomaterials in improving the performance of optoelectronic materials is deemed a necessity. It can address the issues that involve the environment and large-scale production. In this work, an Indium Gallium Zinc Oxide (IGZO)- based PD was fabricated, and a water-soluble Cr-phycoerythrin (Cr-PE) biomaterial was easily drop-casted on top of the photodetector to observe its effects in optical and electronic properties. It resulted in a photodetector that operates in dual-band and visible blind detection mode with enhanced responsivity, extended detection region, and switching function properties compared to the pristine fabricated photodetector. This investigation led to qualifying the IGZO PDs as sensors since the measurement from ultraviolet (UV) to ultraviolet-visible (UV-vis) can be alternatively done by dripping and removing the Cr-PE on top of the IGZO layer. Since the detection region can be extended from UV to visible wavelength, its potential for extensive applications can also be expanded. The study has contributed and demonstrated a better understanding of the different potential functions of biomaterials toward an improved and environmentally- friendly process for fabricating devices.

Keywords: biomaterials, photodetectors, Indium Gallium Zinc Oxide (IGZO), Cr-Phycoerythrin (Cr-PE), optoelectronic devices