Electronic and Thermoelectric Properties of Layered Oxychalcogenides (BiO)CuCh (Ch = S, Se, Te)

被引：25

作者：

Muhammady, Shibghatullah ^{[1
]}

Kurniawan, Yudhi ^{[1
]}

Ishiwata, Seiya ^{[2
]}

Rousuli, Awabaikeli ^{[3
]}

Nagasaki, Toshiki ^{[3
]}

Nakamura, Shogo ^{[4
]}

Sato, Hitoshi ^{[5
]}

Higashiya, Atsushi ^{[6
]}

Yarnasaki, Atsushi ^{[7
]}

Hara, Yoshiaki ^{[8
]}

Rusydi, Andriyo ^{[9
]}

Takase, Kouichi ^{[2
]}

Darma, Yudi ^{[1
]}

机构：

[1] Inst Teknol Bandung, Fac Math & Nat Sci, Dept Phys, Bandung 40132, Indonesia

[2] Nihon Univ, Coll Sci & Technol, Tokyo, Tokyo 1010062, Japan

[3] Hiroshima Univ, Grad Sch Sci, Kagamiyama 1-3-1, Higashihiroshima 7398526, Japan

[4] Hiroshima Univ, Fac Sci, Kagamiyama 1-3-1, Higashihiroshima 7398526, Japan

[5] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Kagamiyama 2-313, Higashihiroshima 7390046, Japan

[6] Setsunan Univ, Fac Sci & Engn, Neyagawa, Osaka 5728508, Japan

[7] Konan Univ, Fac Sci & Engn, Kobe, Hyogo 6588501, Japan

[8] Ibaraki Coll, Natl Inst Technol, Ibaraki 3128508, Japan

[9] Natl Univ Singapore, Dept Phys, NUSNNI NanoCore, Singapore 117411, Singapore

来源：

INORGANIC CHEMISTRY | 2018年 / 57卷 / 16期

关键词：

P-TYPE SEMICONDUCTOR; BICUSEO; PERFORMANCE; CRYSTAL; PHOTOEMISSION; MORPHOLOGY; STABILITY; (LAO)CUS; OXIDE;

D O I：

10.1021/acs.inorgchem.8b01396

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We study the new details of electronic and thermoelectric properties of polycrystalline layered oxychalcogenide systems of (BiO)CuCh (Ch = Se, Te) prepared by using a solid-state reaction. The systems were characterized by using photoemission (PE) spectroscopy and four-probe temperature dependent electrical resistivity p(T). PE spectra are explained by calculating the electronic properties using the generalized gradient approximation method. PE spectra and p(T) show that (BiO)CuSe system is a semiconductor, while (BiO)CuTe system exhibits the metallic behavior that induces the high thermoelectric performance. The calculation of electronic properties of (BiO)CuCh (Ch = S, Se, Te) confirms that the metallic behavior of (BiO)CuTe system is mainly induced by Te Sp states at Fermi energy level, while the indirect bandgaps of 0.68 and 0.40 eV are obtained for (BiO)CuS and (BiO)CuSe systems, respectively. It is also shown that the local symmetry distortion at Cu site strongly stimulates Cu 3d-t2g to be partially hybridized with Ch p orbitals. This study presents the essential properties of the inorganic systems for novel functional device applications.

引用

页码：10214 / 10223

页数：10

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