Site Specific In <sup>3</sup> ⁺‐Alloying Unlocks Intense Photoluminescence and High Stability in Antimony Halide Hybrids for WLED and Anticounterfeiting Applications
Abstract
Abstract While metal doping strategies have proven effective in regulating the bandgap and enhancing the photophysical properties of hybrid metal halides, site‐specific atom alloying by mixing metals of different elements offers a new route for material modification. Here an antimony halide hybrid material with the formula of (C₄H₁₂N₂)₅[(SbCl₅)₂(SbCl₆)Cl₄] ( Py‐SbCl ) is shown with crystallographically independent alternating square pyramidal [SbCl₅] and octahedral [SbCl₆] sites sandwiched by organic layers. Interestingly, the octahedral site of the [SbCl₆] can be fully replaced by the In 3+ ions, forming the alloyed compound (C₄H₁₂N₂)₅[(SbCl₅)₂(InCl₆)Cl₄] ( Py‐SbInCl ). More importantly, the latter shows a near‐unity photoluminescence quantum yield of 97%, which is ≈7 times of enhancement compared to the pristine Py‐SbCl compound. This is mainly due to the much‐enhanced Young's modulus, higher radiative decay rates and longer electron transient rates, presumably stemming from shorter In─Cl bond distances and higher dipole moments, as revealed by a cocktail study of X‐ray single‐crystal crystallography, density functional theory, femtosecond transient absorption spectroscopy and so on. In addition, it is shown that Py‐SbInCl is an excellent yellow phosphor that can be used for white light‐emitting diodes and other applications such as counterfeiting. Therefore, making site‐specific alloying compounds may open a new design approach for functional bimetallic hybrid materials.
Article Details
Authors (6)
Faizan Ahmad
School of Chemistry Frontier Institute of Science and Technology Interdisciplinary Research Center of Frontier Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Mater Xi'an Key Laboratory of Electronic Devices and Materials Chemistry Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry Xi'an Jiaotong University Xi'an 710054 China
Mohamed Saber Lassoued
School of Chemistry Frontier Institute of Science and Technology Interdisciplinary Research Center of Frontier Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Mater Xi'an Key Laboratory of Electronic Devices and Materials Chemistry Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry Xi'an Jiaotong University Xi'an 710054 China
Qian‐Cheng Luo
School of Chemistry Frontier Institute of Science and Technology Interdisciplinary Research Center of Frontier Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Mater Xi'an Key Laboratory of Electronic Devices and Materials Chemistry Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry Xi'an Jiaotong University Xi'an 710054 China
Ya'nan Shen
Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Photonic Technique for information School of Electronics Science & Engineering Faculty of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China
Lihe Yan
Key Laboratory for Physical Electronics and Devices of the Ministry of Education and Shaanxi Key Lab of Photonic Technique for Information, School of Electronics Science and Engineering, Faculty of Electronic and Information Engineering, Xi’an Jiaotong University , Xi’an 710049,
Yan‐Zhen Zheng
Frontier Institute of Science and Technology Interdisciplinary Research Center of Frontier Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Key Laboratory of Electronic Devices and Materials Chemistry Xi'an Jiaotong University Xi'an 710054 China