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説明:

Cesium-tin-bromide perovskite (CsSnBr3) has focused on as a candidate material for all-inorganic perovskite solar cell and thermoelectric energy converter because of its optical, electrical, and thermal properties. On the other hand, the electrical properties have not been clarified yet because of several inconsistent reports. In this paper, we produced CsSnBr3 bulk from a melt using the precursor powder prepared by a mechanochemical process. From powder X-ray diffraction analysis, main phase of the precursor was CsSnBr3 perovskite, and minor impurities were Cs2SnBr4 and CsSn2Br5. Although main phase of the bulk produced from a melt was CsSnBr3, small amount impurity, CsSn2Br5 was confirmed. From the electrical conductivity (σt) measurement, irreversible temperature dependence of σt was observed at first time increasing temperature. The conductivity measured from room temperature to 443 K at the first time showed metallic behavior. On the other hand, the temperature dependence is changed into opposite with decreasing temperature. At this operation, σt decrease with decreasing temperature. This semiconductor like behavior was found to be reversible after first increasing temperature operation. These results indicate that post anneal as well as production process of CsSnBr3 would be important to control its electric property.

権利情報:

• In Copyright
  

キーワード: CsSnBr3, cesium tin bromide, perovskite, mechanochemical synthesis, electrical conductivity

刊行年月日: 2024-11-01

出版者: Japan Institute of Metals

掲載誌:

• MATERIALS TRANSACTIONS (ISSN: 13475320) vol. 65 issue. 11 p. 1397-1401

研究助成金:

• JSPS 17H01317 (科研費基盤研究（A))

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.2320/matertrans.MT-Y2024005

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更新時刻: 2024-10-28 16:30:21 +0900

MDRでの公開時刻: 2024-10-28 16:30:21 +0900