Enhanced Performance of IZO/ZnO Heterostructure Thin-Film Transistors and Its Biosensing Applications via Single-Precursor Solution Process.

Da Ye Kim, Noah Jang, Hyunjun Kim, Daewoong Jung, Seong Ho Kong, June Soo Kim

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Article in ACS omega, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Da Ye KimSchool of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.

Noah JangSchool of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.

Hyunjun KimSchool of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.

Daewoong JungCollege of Nanoscience & Nanotechnology, Department of Nanomechatronics Engineering, Pusan National University, Busan 46241, Republic of Korea.ORCID https://orcid.org/0000-0002-1348-6455

Seong Ho KongSchool of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.

June Soo KimSmart Manufacturing Innovation Centre, Korea Electronics Technology Institute, Seongnam 13509, Republic of Korea.ORCID https://orcid.org/0000-0002-1959-3753

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We report IZO/ZnO heterostructure thin film transistors (TFTs) fabricated by a single-precursor sol-gel process where a ZnO-rich surface region forms on an In-based oxide layer after annealing. The heterostructure improves the electrical response compared to a single-layer oxide TFT and provides a probe-free platform for biomolecule detection. As a demonstration, we detect pUC-18 plasmid DNA (2686 bp) over concentrations from 1 pg/mL to 10 ng/mL using transfer/output-curve changes as the sensing signal. The device exhibits a pronounced negative shift of threshold voltage and a strong increase in saturated current after exposure, enabling high sensitivity at low concentration; in particular, sensitivity exceeding 200% is obtained at 1 pg/mL, corresponding to a limit of detection of 1 pg/mL. These results suggest that the IZO/ZnO heterostructure TFT can serve as a simple and rapid probe-free biosensing platform produced via a low-cost solution process.

Identifiers

PMID42040438

DOI10.1021/acsomega.5c12074

PMCPMC13103753

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LicenceCC BY-NC-ND

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.