The impact of thickness-related grain boundary migration on hole concentration and mobility of p-type transparent conducting CuI films.

Ruibin Xue, Gang Gao, Lei Yang, Liangge Xu, Yumin Zhang, Jiaqi Zhu

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Article in RSC advances, 2024. 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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5 · Who and what money

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6 authors.

Ruibin XueNational Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology Harbin 150080 P. R. China gaogang@hit.edu.cn zhym@hit.edu.cn.ORCID https://orcid.org/0000-0003-3512-6378

Gang GaoNational Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology Harbin 150080 P. R. China gaogang@hit.edu.cn zhym@hit.edu.cn.ORCID https://orcid.org/0000-0001-5062-7758

Lei YangCenter of Analysis Measurement, Harbin Institute of Technology Harbin 150001 P. R. China.

Liangge XuNational Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology Harbin 150080 P. R. China gaogang@hit.edu.cn zhym@hit.edu.cn.ORCID https://orcid.org/0000-0002-2332-5321

Yumin ZhangNational Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology Harbin 150080 P. R. China gaogang@hit.edu.cn zhym@hit.edu.cn.ORCID https://orcid.org/0000-0002-9806-4277

Jiaqi ZhuNational Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology Harbin 150080 P. R. China gaogang@hit.edu.cn zhym@hit.edu.cn.ORCID https://orcid.org/0000-0002-2142-7260

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

CuI films present promising optoelectronic properties for transparent conductors. However, the high hole concentration in CuI films hinders the controllable modulation of hole mobility, limiting their application in low-dimensional thin-film transistors. In this study, CuI films were prepared through a Cu film iodination method at room temperature, and a systematic investigation was conducted on the modulation of hole concentration and mobility with varying film thickness. The films exhibited a zinc blende structure (γ-phase) with increasing grain size as the thickness increased. The transmittance and optical bandgap of the films decreased with increasing thickness. The correlation of vacancy concentration with changing film thickness was analyzed through photoluminescence spectroscopy, revealing the influence of grain boundary migration on vacancy formation. The reduction in film thickness diminishes the migration of CuI grain boundaries, consequently reducing the probability of Cu vacancy and I vacancy formation, resulting in diminished hole concentration and enhanced hole mobility and film conductivity. The film with a thickness of 20 nm demonstrated optimal performance, with a transmittance of 90%, hole concentration of 4.09 × 10

Identifiers

PMID38500616

DOI10.1039/d4ra00704b

PMCPMC10945372

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LicenceCC BY-NC

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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.