Strong Photoelectric Properties of Mn‐Based Seleniumstannates with Alkali Metals as Structure‐Directing Agents

• Published in: European journal of inorganic chemistry 2023-01, Vol.26 (2), p.n/a
• Main Authors: Teri, Gele, Liu, Xin, Li, Na, Shele, Muge, E, Namila, Qi, Liming, Bai, Sagala, Baiyin, Menghe
• Format: Article
• Language: English
• Subjects: Alkali metals; Anions; Band structure; Electronic structure; Inorganic chemistry; Methylene blue; Mn-based seleniumstannates; Optical properties; Photocurrent response; Photodegradation; Photoelectric effect; Photoelectricity; Semiconductors; Structure-directing agents
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.202200607

In recent years, chalcogenides have received a lot of attention because of their potential applications as photoelectric material. This work describes the synthesis of the quaternary seleniumstannates Cs2MnSnSe4 (1) and Rb2MnSnSe4 (2) using solvothermal methods. The structure of compound 1 consists of charge‐balanced Cs+ cation and one‐dimensional (1D) anion [MnSnSe4]n2− chain. Compound 2 possesses a unique two‐dimensional (2D) anion [MnSnSe4]n2− layer. It is noteworthy that the compounds exhibit a strong photocurrent response (ca. 45 μA/cm2 (1), ca. 80 μA/cm2 (2)). Moreover, methylene blue (MB) was investigated for its photocatalytic degradation properties. In order to better understand the relationship between optical properties and electronic structure, a theoretical study was conducted. The Mn‐based seleniumstannates A2MnSnSe4 (A=Cs for 1, A=Rb for 2) from one‐dimensional to two‐dimensional was synthesized by solvothermal method using an alkali metals as structure‐directing agents. Moreover, the degradation of methylene blue was investigated to test their photocatalytic degradation properties. In order to better understand the relationship between optical properties and electronic structure, a theoretical study was conducted. The band structure of 1 and 2 indicates they are direct band gap semiconductors.