Role of Metal-Chloride Anions in Photoluminescence Regulations for Hybrid Metal Halides

Binbin Su; Gaomin Song; Maxim S Molokeev; Nicolay N Golovnev; Maxim K Lesnikov; Zheshuai Lin; Zhiguo Xia

doi:10.1021/acs.jpclett.1c00182

Role of Metal-Chloride Anions in Photoluminescence Regulations for Hybrid Metal Halides

J Phys Chem Lett. 2021 Feb 25;12(7):1918-1925. doi: 10.1021/acs.jpclett.1c00182. Epub 2021 Feb 16.

Authors

Binbin Su¹, Gaomin Song², Maxim S Molokeev^{3

4

5}, Nicolay N Golovnev⁴, Maxim K Lesnikov⁴, Zheshuai Lin^{2

6}, Zhiguo Xia¹

Affiliations

¹ The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Technology, South China University of Technology, Guangzhou 510640, PR China.
² Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing 100190, China.
³ Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia.
⁴ Siberian Federal University, Krasnoyarsk 660041, Russia.
⁵ Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russia.
⁶ Center of Materials Science and Optoelectronics Engineering, University of the Chinese Academy of Sciences, Beijing 100049, China.

PMID: 33591758
DOI: 10.1021/acs.jpclett.1c00182

Abstract

Organic-inorganic hybrid metal halides with emissive organic cations are of great interest due to their structural diversity and interesting photophysical properties. Here, we assemble emissive organic cations (EnrofloH₂²⁺) with different metal-chloride anions (Pb₂Cl₆^2- to Bi₂Cl₁₀^4- to SnCl₆^2-) to form the new single crystal phases, and thus the photoluminescence properties of the metal halides, including Stokes shift, full width at half-maximum (FWHM), and photoluminescence quantum yield (PLQY) have been studied accordingly. (EnrofloH₂)SnCl₆·H₂O, as an example, possesses narrow FWHM and high PLQY, which are caused by the strong π-π stacking and inter- and intramolecular hydrogen bonds interactions. Compared with EnrofloH₂²⁺ cation in solution, the interactions generate a restraining effect and increase the rigid degree of EnrofloH₂²⁺ cation in the bulk single crystals. Our work clarifies the photophysical properties of the EnrofloH₂²⁺ organic cations by constructing the inter- and intramolecular interactions and boosts the further study of organic-inorganic hybrid metal halides materials with different luminescence mechanisms.