Work

A Unique Sandwich Structure Consisting of Graphene and Pyrene Derivatives for Ultraviolet Light Sensor

Year: 2026

Type: article

Abstract: We propose and demonstrate, for the first time, a sandwich structure of graphene substrates, pyrene derivatives, and an electrolyte for ultraviolet light sensing. A contact capacitor forms at the graphene–electrolyte interface via the electric double layer. When ultraviolet light excites the interlayer of the pyrene derivative, a photo-generated electric field changes the carrier density in graphene, affecting its conductivity. Thus, the sandwich structure responds to ultraviolet light intensity, which is monitored by current changes in different states. Linear fitting shows a strong positive relationship between UV intensity and current (Ids), with R2 above 0.99 and excellent reproducibility. The responsivity (R) and response time (τr) for the measurement at a distance of 50 cm are estimated as 0.7 A/W and 70 s, respectively.

Source: Sensors

DOI: 10.3390/s26175405

Authors: Shiyu Wang, Md. Zakir Hossain

Institution: Gunma University

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,137

Funder: National Institute of Advanced Industrial Science and Technology