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- Title
A Green High‐k Dielectric from Modified Carboxymethyl Cellulose‐Based with Dextrin.
- Authors
Santoso, Leon Lukhas; Prakoso, Suhendro Purbo; Bui, Hai‐Khue; Hong, Qi‐An; Huang, Ssu‐Yu; Chiang, Tai‐Chin; Huang, Kuan‐Yeh; Nurkhamidah, Siti; Tristantini, Dewi; Chiu, Yu‐Cheng
- Abstract
Many crucial components inside electronic devices are made from non‐renewable, non‐biodegradable, and potentially toxic materials, leading to environmental damage. Finding alternative green dielectric materials is mandatory to align with global sustainable goals. Carboxymethyl cellulose (CMC) is a bio‐polymer derived from cellulose and has outstanding properties. Herein, citric acid, dextrin, and CMC based hydrogels are prepared, which are biocompatible and biodegradable and exhibit rubber‐like mechanical properties, with Young modulus values of 0.89 MPa. Hence, thin film CMC‐based hydrogel is explored as a suitable green high‐k dielectric candidate for operation at low voltages, demonstrating a high dielectric constant of up to 78. These fabricated transistors reveal stable high capacitance (2090 nF cm−2) for ≈±3 V operation. Using a polyelectrolyte‐type approach and poly‐(2‐vinyl anthracene) (PVAn) surface modification, this study demonstrates a thin dielectric layer (d ≈30 nm) with a small voltage threshold (Vth ≈−0.8 V), moderate transconductance (gm ≈65 nS), and high ON–OFF ratio (≈105). Furthermore, the dielectric layer exhibits stable performance under bias stress of ± 3.5 V and 100 cycles of switching tests. The modified CMC‐based hydrogel demonstrates desirable performance as a green dielectric for low‐voltage operation, further highlighting its biocompatibility.
- Subjects
DIELECTRIC materials; DIELECTRICS; HAZARDOUS substances; CARBOXYMETHYLCELLULOSE; ELECTRONIC equipment; INDIUM gallium zinc oxide
- Publication
Macromolecular Rapid Communications, 2024, Vol 45, Issue 12, p1
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.202400059