Volume 62, Issue 35 e202307646
Research Article

Hybrid Double Perovskite Derived Halides Based on Bi and Alkali Metals (K, Rb): Diverse Structures, Tunable Optical Properties and Second Harmonic Generation Responses

Jiaqian Zhou

Jiaqian Zhou

Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

These authors contributed equally to this work.

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Peiran Xie

Peiran Xie

Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

These authors contributed equally to this work.

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Chao Wang

Chao Wang

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

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Tieyuan Bian

Tieyuan Bian

Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077 China SAR

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Dr. Jian Chen

Dr. Jian Chen

Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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Dr. Yang Liu

Dr. Yang Liu

Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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Zhu Guo

Zhu Guo

Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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Congcong Chen

Congcong Chen

Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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Xin Pan

Xin Pan

Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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Prof. Dr. Min Luo

Prof. Dr. Min Luo

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

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Prof. Dr. Jun Yin

Corresponding Author

Prof. Dr. Jun Yin

Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077 China SAR

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Prof. Dr. Lingling Mao

Corresponding Author

Prof. Dr. Lingling Mao

Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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First published: 10 July 2023
Citations: 13

Graphical Abstract

15 double perovskite derived halides A2BBiX6 are reported here, composed of organic cationic ligand A, forming diverse novel structures varying in dimensionalities. Various combinations of A, B and X create new structural types and tunable optical properties, where two-thirds of these phases are non-centrosymmetric and second-harmonic generation active.

Abstract

Double perovskites (DP) have attracted extensive attention due to their rich structures and wide application prospects in the field of optoelectronics. Here, we report 15 new Bi-based double perovskite derived halides with the general formula of A2BBiX6 (A=organic cationic ligand, B=K or Rb, X=Br or I). These materials are synthesized using organic ligands to coordinate with metal ions with a sp3 oxygen, and diverse structure types have been obtained with distinct dimensionalities and connectivity modes. The optical band gaps of these phases can be tuned by changing the halide, the organic ligand and the alkali metal, varying from 2.0 to 2.9 eV. The bromide phases exhibit increasing photoluminescence (PL) intensity with decreasing temperature, while the PL intensity of iodide phases changes nonmonotonically with temperature. Because the majority of these phases are non-centrosymmetric, second harmonic generation (SHG) responses are also measured for selected non-centrosymmetric materials, showing different particle-size-dependent trends. Our findings give rise to a series of new structural types to the DP family, and provide a powerful synthetic handle for symmetry breaking.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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