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High-Capacity, Fast-Response, and Photocapacitor-Based Terpolymer Phosphor Composite
Marwa Mokni1, Francesco Pedroli1, Giulia D'Ambrogio1
1Electrical Department, University Lyon, INSA-Lyon, Ladoua Campus, LGEF Loboratory, EA682, F-69621 Villeurbanne, France.
Polymers
|February 12, 2020
Summary
Researchers developed a novel flexible light transducer using a P(VDF-TrFE-CTFE) terpolymer with phosphor particles. This material efficiently converts light to electrical signals, showing potential for retinal prostheses.
Area of Science:
- Materials Science
- Biomedical Engineering
- Photonics
Background:
- Flexible electronic devices are crucial for advanced applications like retinal prostheses.
- Developing efficient light-to-electrical signal transducers is a key challenge in biointegrated electronics.
Purpose of the Study:
- To develop and characterize a novel flexible photodetector composite for light energy transduction.
- To evaluate the potential of this composite for applications in retinal prostheses.
Main Methods:
- Synthesis of a poly (vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) (P(VDF-TrFE-CTFE)) terpolymer doped with 50% wt. phosphor particles.
- Broadband dielectric characterization and photo-electric conversion experiments.
- Measurement of capacitance variation under blue and green light exposure.
Main Results:
- The composite demonstrated efficient light energy to electrical signal conversion.
- Significant capacitance changes of 78% (blue light) and 25% (green light) were recorded.
- The material exhibited fast response, high sensitivity, light-weight, and ultra-flexibility.
Conclusions:
- The phosphor-doped P(VDF-TrFE-CTFE) terpolymer is a promising material for flexible light transducer applications.
- The enhanced charge-discharge efficiency and reduced dielectric loss facilitate its use in medical devices like retinal prostheses.
