Continuous‐Flow Synthesis of Orange Emitting Sn(II)‐Doped CsBr Materials

Das Adhikari, Samrat; Masi, Sofia; Echeverría‐Arrondo, Carlos; Miralles‐Comins, Sara; Sánchez, Rafael S.; Fernandes, Jesum Alves; Chirvony, Vladimir; Martínez‐Pastor, Juan P.; Sans, Victor; Mora‐Seró, Iván

Abstract

An ongoing demand toward lead-free all-inorganic cesium metal halide perovskites has presented Sn(II) as an ideal substitute of Pb(II) for applications in optoelectronic devices. The major concern regarding Sn(II) is the instability due to the ambient oxidation to Sn(IV). To expand the scope of traditional perovskite and analogues, herein the synthesis and optical performance of Sn(II)-doped CsBr, a new material formed by interstitial doping of Sn(II) into the CsBr matrix, are reported for the first time. This material is prepared following an antisolvent mediated recrystallization method using a continuous flow reactor, which is beneficial for scaling up the production compared to traditional batch reactors. Sn(II)-doped CsBr exhibits broadband orange emission with full-width-half-maximum of 180 nm and a photoluminescence quantum yield of 21.5%. The emission turned to be highly stable over 7 months despite containing Sn(II). It is suggested that this is due to interstitial location of Sn(II) atoms in bulk of microcrystals. A broadband emission and high aerobic stability are attractive properties of the material for white-light emitting applications.

Citation

Das Adhikari, S., Masi, S., Echeverría‐Arrondo, C., Miralles‐Comins, S., Sánchez, R. S., Fernandes, J. A., …Mora‐Seró, I. (2021). Continuous‐Flow Synthesis of Orange Emitting Sn(II)‐Doped CsBr Materials. Advanced Optical Materials, 9(21), Article 2101024. https://doi.org/10.1002/adom.202101024

• Journal Article Type: Article
• Acceptance Date: Jul 23, 2021
• Online Publication Date: Sep 5, 2021
• Publication Date: Nov 4, 2021
• Deposit Date: Oct 7, 2021
• Publicly Available Date: Oct 7, 2021
• Journal: Advanced Optical Materials
• Electronic ISSN: 2195-1071
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 21
• Article Number: 2101024
• DOI: https://doi.org/10.1002/adom.202101024
• Keywords: Atomic and Molecular Physics, and Optics; Electronic, Optical and Magnetic Materials
• Public URL: https://nottingham-repository.worktribe.com/output/6395136
• Publisher URL: https://onlinelibrary.wiley.com/doi/10.1002/adom.202101024