Self-Powered UVC Photodetector Based on Europium Metal-Organic Framework for Facile Monitoring Invisible Fire

Thi My Huyen Nguyen; Chung Wung Bark

doi:10.1021/acsami.2c13231

Self-Powered UVC Photodetector Based on Europium Metal-Organic Framework for Facile Monitoring Invisible Fire

ACS Appl Mater Interfaces. 2022 Oct 12;14(40):45573-45581. doi: 10.1021/acsami.2c13231. Epub 2022 Sep 30.

Authors

Thi My Huyen Nguyen¹, Chung Wung Bark¹

Affiliation

¹ Department of Electrical Engineering, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do13120, South Korea.

PMID: 36178426
DOI: 10.1021/acsami.2c13231

Abstract

The effective use of a europium metal-organic framework (Eu-MOF) as a photoabsorber material has been reported. Using the advantages of Eu-MOFs including simple preparation, wide bandgap structure, and stability in the environment, a self-powered and high UVC-selectivity detector based on Eu-MOF nanoparticles was prepared with a simple device geometry. The as-fabricated photodetector was highly sensitive to 254 nm UV illumination without an external power supply. Accordingly, it exhibited a high UVC-to-UVA rejection ratio (I₂₅₄/I₃₆₅ ≈ 40) and UVC-to-solar rejection ratio (I₂₅₄/I_{solar light} ≈ 34), a fast response time of 98/122 ms, a comparable on/off photocurrent ratio (107.33), and superior stability. The self-powered Eu-MOF photodetector can detect and monitor UV emission from an invisible fire in an early state at room temperature, suggesting practical use as a potential optoelectronic device.

Keywords: UVC photodetector; europium metal−organic framework; high UVC selectivity; invisible fire detection; self-powered photodetector.