Luminescent hybrid halides with various centering metal cations (Zn, Cd and Pb) and diverse structures. Issue 16 (24th March 2023)

• Record Type: Journal Article
• Authors: Fan, Liubing; Hao, Shiqiang; He, Shihui; Zhang, Xusheng; Li, Mingyang; Wolverton, Christopher; Zhao, Jing; Liu, Quanlin
• Is Part Of: Dalton transactions. Volume 52:Issue 16(2023)
• Page Start: 5119
• Page End: 5126
• Publication Date: 2023-03-24
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt04067k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Three luminescent hybrid metal halides (Bmpip)- M –Br ( M = Zn, Cd and Pb; Bmpip = 1-butyl-1-methyl-piperidinium) were obtained, and they possess isolated tetrahedra or one-dimensional face-sharing octahedral chains with excellent air stability. Abstract : Organic–inorganic hybrid metal halides have been extensively studied because of their great potential in optoelectronics. Herein, we report three hybrid metal halides (Bmpip)2 ZnBr4, (Bmpip)2 CdBr4, and (Bmpip)8 Pb11 Br30 (where Bmpip + is 1-butyl-1-methyl-piperidinium, C10 H22 N + ). (Bmpip)2 ZnBr4 and (Bmpip)2 CdBr4 crystallize in the P 21 / c space group with zero-dimensional crystal structures with [ M Br4 ] 2− ( M = Zn, Cd) tetrahedra isolated by Bmpip + . (Bmpip)8 Pb11 Br30 crystallizes in the triclinic space group P 1̄ with one-dimensional corrugated chains constructed from face-sharing [PbBr6 ] 4− octahedra. All of the compounds exhibit excellent ambient and thermal stability. Under UV excitation, all three compounds exhibit very broad emissions. Temperature-dependent photoluminescence measurements indicate that the broad emissions of (Bmpip)2 ZnBr4 and (Bmpip)2 CdBr4 can be attributed to both the organic cations and self-trapped excitons (STEs) and that the emission of (Bmpip)8 Pb11 Br30 is assigned to STEs. Density functional theory calculations reveal that the three compounds adopt a direct band gap. This work enriches our understanding of the structure types of hybrid metal halides while revealing their diverse emission mechanisms.