Organic cation directed hybrid lead halides of zero-dimensional to two-dimensional structures with tunable photoluminescence properties. Issue 10 (21st August 2019)

• Record Type: Journal Article
• Authors: Yue, Cheng-Yang; Sun, Hai-Xiao; Liu, Quan-Xiu; Wang, Xin-Ming; Yuan, Zhao-Shuo; Wang, Juan; Wu, Jia-Hang; Hu, Bing; Lei, Xiao-Wu
• Is Part Of: Inorganic chemistry frontiers. Volume 6:Issue 10(2019)
• Page Start: 2709
• Page End: 2717
• Publication Date: 2019-08-21
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9qi00684b
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : A series of new inorganic–organic hybrid lead halides have been solvothermally synthesized and characterized with tunable luminescence properties from yellow, orange to red emissions with the largest reported Stokes shift. Abstract : Recently, organic–inorganic hybrid lead halides have been explored as photoluminescent (PL) materials with flexible structural tunabilities and high photoluminescence quantum efficiencies, which can be modified by the structure regulating functions of organic cations. Here, by adopting different saturated organic cations as structure directing agents (SDAs), a series of organic–inorganic hybrid lead halides have been solvothermally synthesized and characterized with different structural types. Compound [(CH3 )2 NH2 ]2 [H2 DABCO]2 Pb3 I12 (1, DABCO = 1, 4-diazabicyclo[2.2.2]-octane) features a linear zero-dimensional (0D) [Pb3 I12 ] 6− trimer, and [(Me)6 -en]2 Pb3 I10 (2 ) and [H2 N-Prpipz]2 Pb3 Br10 (3 ) contain two different types of one-dimensional (1D) [Pb3 X10 ] 4− chains based on the C 3 -symterric [Pb3 X11 ] trimer and [PbX6 ] unit, respectively. In the structures of H[(Me)2 -DABCO]Pb3 I9 (4 ) and H[(Me)4 -pipz]Pb3 I9 (5, pipz = piperazine), the C 3 -symmetric [Pb3 I11 ] trimers are interlinked to form the same two-dimensional (2D) corrugated [Pb3 I9 ] 3− layers. Under the excitation of UV irradiation, these hybrid lead halides exhibit tunable luminescence properties from yellow, orange to red emissions with the largest Stokes shift of 335 nm. The PL nature is also investigated based on temperature-dependent PL emission, time-resolved PL and theoretical calculations, etc . These hybrid lead halides provide new types of structural models to probe into the PL properties and understand the underlying structure–property relationship.