A Green High‐k Dielectric from Modified Carboxymethyl Cellulose‐Based with Dextrin

Author:

Santoso Leon Lukhas123,Prakoso Suhendro Purbo1ORCID,Bui Hai‐Khue1ORCID,Hong Qi‐An1,Huang Ssu‐Yu4,Chiang Tai‐Chin56,Huang Kuan‐Yeh4ORCID,Nurkhamidah Siti7ORCID,Tristantini Dewi3ORCID,Chiu Yu‐Cheng12ORCID

Affiliation:

1. Department of Chemical Engineering National Taiwan University of Science and Technology No. 43, Sec. 4, Keelung Rd., Da'an Dist. Taipei 10607 Taiwan

2. Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei 10617 Taiwan

3. Department of Chemical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok 16424 Indonesia

4. Industrial Technology Research Institute Hsinchu Taiwan

5. The Second Research Division Chung‐Hua Institution for Economic Research Taipei 10672 Taiwan

6. School of Engineering Tokyo Institute of Technology Tokyo 152‐8550 Japan

7. Chemical Engineering Department Institut Teknologi Sepuluh Nopember (ITS) Kampus ITS Sukolilo Surabaya 60111 Indonesia

Abstract

AbstractMany 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.

Funder

Universitas Indonesia

National Taiwan University of Science and Technology

Publisher

Wiley

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