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Flexible light-addressable electrochemical sensor using one-step synthesized PTEB organic semiconductors
Sen Wang1, Yao Meng2, Ruoyu Liu2
1Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, China; School of Future Technology, Xi'an Jiaotong University, Xi'an, 710049, China.
Talanta
|September 23, 2025
Summary
Researchers developed a flexible light-addressable electrochemical sensor (LAES) using a novel organic semiconductor, poly(1,3,5-triethynylbenzene) (PTEB). This PTEB-based LAES offers excellent mechanical stability and high performance for wearable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Organic Electronics
Background:
- Light-addressable electrochemical sensors (LAES) offer spatially resolved measurements without physical interconnects.
- Current LAES predominantly use rigid inorganic semiconductors, hindering flexible electronics applications.
Purpose of the Study:
- To develop a novel LAES platform using an organic semiconductor for enhanced flexibility.
- To investigate the properties and performance of poly(1,3,5-triethynylbenzene) (PTEB) in LAES applications.
Main Methods:
- Synthesis of poly(1,3,5-triethynylbenzene) (PTEB) via copper-catalyzed Glaser coupling.
- Fabrication of PTEB-based LAES on conductive polyester substrates.
- Characterization of PTEB film morphology, bandgap, photoelectrochemical response, and mechanical stability.
Main Results:
- PTEB films formed an interconnected porous network with a direct bandgap of 2.15 eV.
- The LAES demonstrated strong photoelectrochemical responsiveness, high pH sensitivity, and microscale imaging resolution.
- PTEB-based LAES retained 95% of photocurrent response under mechanical bending, showing excellent stability.
Conclusions:
- PTEB is a promising organic semiconductor for flexible LAES.
- This work overcomes limitations of inorganic semiconductors in LAES.
- The developed platform enables next-generation flexible and wearable LAES devices.
