Advanced Organic-Inorganic Hybrid Solar-Blind UV Photodetector With β-Ga₂O₃ Film From Thermal Oxidation

In this article, a simple and reproducible technology combining one-step thermal oxidation and the spraying method is presented for fabricating the high-performance organic-inorganic hybrid solar-blind ultraviolet (SBUV) photodetector (PD). \beta -Ga2O3/GaN het- erojunction is readily built by the...

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Bibliographic Details
Published in:IEEE transactions on electron devices 2024-09, Vol.71 (9), p.5450-5455
Main Authors: Liang, Jiarong, Li, Weisen, Xie, Jili, Cai, Han, Tang, Xingui, Zhang, Dan, Zheng, Wei
Format: Article
Language:English
Subjects:
Communications systems
Conductivity
Gallium nitride
Gallium nitrides
Gallium oxides
Heterojunction devices
Heterojunctions
Light irradiation
Morse code
Optical receivers
Oxidation
photodetector (PD)
Photometers
Photovoltaic cells
Radiation effects
Scale (corrosion)
solar-blind ultraviolet (SBUV)
Spraying
Substrates
thermal oxidation
Ultraviolet detectors
X-ray scattering
β-Ga₂O
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Summary:In this article, a simple and reproducible technology combining one-step thermal oxidation and the spraying method is presented for fabricating the high-performance organic-inorganic hybrid solar-blind ultraviolet (SBUV) photodetector (PD). \beta -Ga2O3/GaN het- erojunction is readily built by the one-step thermal oxidation and sprayed with organic transparent conductive PEDOT:PSS to finish the construction of PEDOT:PSS/ \beta -Ga2O3/GaN organic-inorganic hybrid heterojunction devices. Here, the optimal dosage of PEDOT:PSS is determined as 2 mL by balancing its SBUV transmittance and conductivity. The optimized device constructed with this 2 mL PEDOT:PSS exhibits a high photoresponsivity of 8.52 mA/W, a fast response with a decay time of 40.7 ms, and an SBUV-UV injection ratio ( {R}_{\text {258 nm/365 nm}} ) over three orders of magnitude under 0 V bias and SBUV light irradiation. In addition, the feasibility of using PEDOT:PSS/ \beta -Ga2O3/GaN SBUV PD as an optical receiver for secure SBUV communication systems encrypted by international Morse code has been verified. The low-cost and high-efficiency synthesis of gallium oxide as well as the preparation of organic-inorganic hybrid SBUV PDs proposed in this study can provide a new reference for the large-scale production of \beta -Ga2O3-based high-performance heterojunction SBUV photovoltaic (PV) PDs.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2024.3421186