Electric field created p-n junction in composite films made from carbon nanotubes, iron (III) sulfate and polyvinyl alcohol

Hsin-Jung Tsai; Ching-You Ke; Yung-Kai Yang; Wen-Kuang Hsu

doi:10.1038/s41598-022-15294-4

Electric field created p-n junction in composite films made from carbon nanotubes, iron (III) sulfate and polyvinyl alcohol

Sci Rep. 2022 Jul 1;12(1):11203. doi: 10.1038/s41598-022-15294-4.

Authors

Hsin-Jung Tsai¹, Ching-You Ke¹, Yung-Kai Yang¹, Wen-Kuang Hsu²

Affiliations

¹ Department of Materials Science and Engineering & High Entropy Alloy Center, National Tsing-Hua University, Hsinchu City, 300044, Taiwan.
² Department of Materials Science and Engineering & High Entropy Alloy Center, National Tsing-Hua University, Hsinchu City, 300044, Taiwan. wkhsu@mx.nthu.edu.tw.

Abstract

Suspension made of Fe₂(SO₄)_3(aq), polyvinyl alcohol and carbon nanotubes is placed in electric field to separate charges. Charges remain separated as suspension solidifies, forming composite films with cations and anions enriched at opposite sides. Polarized films behave as junction diodes with forward current and threshold voltage found to be 10^-4-10^-5 A and 2.4-2.6 V at ± 5 V. Rectification is preserved in strained composite films.

Abstract

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