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Enhancing Humidity Sensing with Functionalized Perylene-Coated Dispense Printed Electrodes: A Comparative Study.

Sahira Vasquez¹, Samuel Morales-Cámara², Carmen Moraila³

¹Faculty of Engineering, Free University of Bolzano-Bozen, via Bruno Buozzi 1, 39100 Bolzano, Italy.

ACS Applied Electronic Materials

|July 31, 2025

Summary

This summary is machine-generated.

A novel perylene-based organic ligand shows high sensitivity for humidity sensing. This material offers potential for advanced electronic devices without needing temperature compensation.

Keywords:

Perylene diimides dispense printing ligands material synthesis relative humidity

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Area of Science:

Materials Science
Organic Electronics
Chemical Engineering

Background:

Advancements in electronic devices rely on novel sensing materials.
Perylene derivatives are explored for their unique electronic properties.

Purpose of the Study:

To synthesize and evaluate a custom perylene-based organic ligand for humidity sensing.
To compare its performance against a commercial perylene derivative.

Main Methods:

Synthesis of a custom perylene-based ligand (PY).
Fabrication of impedimetric sensors using PY and a commercial perylene derivative (PBI) on polyimide substrates with printed electrodes.
Systematic comparison of sensing performance, including sensitivity and temperature dependence.

Main Results:

The PY-based sensor exhibited high humidity sensitivity (-5289 Ω/% RH at 1 kHz, 30-90% RH) with minimal temperature dependence.
The PBI-based sensor showed lower sensitivity (-452 Ω/% RH) and negligible temperature response.
PY demonstrated superior performance compared to PBI for humidity detection.

Conclusions:

Functionalized perylene derivatives, like PY, are promising for high-performance humidity sensors.
These sensors offer minimal thermal interference, negating the need for temperature compensation.
The findings support molecular design strategies for next-generation environmental monitoring and flexible electronics.