Competing Energy Transfer in Two-Dimensional Mn2+-Doped BDACdBr4 Hybrid Layered Perovskites with Near-Unity Photoluminescence Quantum Yield

Canxu Chen; Shuai Zhang; Ruosheng Zeng; Binbin Luo; Yuanjie Chen; Sheng Cao; Jialong Zhao; Bingsuo Zou; Jin Zhong Zhang

doi:10.1021/acsami.2c13878

Competing Energy Transfer in Two-Dimensional Mn²⁺-Doped BDACdBr₄ Hybrid Layered Perovskites with Near-Unity Photoluminescence Quantum Yield

ACS Appl Mater Interfaces. 2022 Oct 12;14(40):45725-45733. doi: 10.1021/acsami.2c13878. Epub 2022 Oct 3.

Authors

Canxu Chen¹, Shuai Zhang¹, Ruosheng Zeng¹, Binbin Luo², Yuanjie Chen¹, Sheng Cao¹, Jialong Zhao¹, Bingsuo Zou¹, Jin Zhong Zhang³

Affiliations

¹ School of Physical Science and Technology, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China.
² Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou 515063, Guangdong, China.
³ Department of Chemistry and Biochemistry, University of California, Santa Cruz 95064, California, United States.

PMID: 36190450
DOI: 10.1021/acsami.2c13878

Abstract

Two-dimensional (2D) hybrid layered perovskites (HLPs) have attracted extensive attention due to their excellent optoelectronic properties. Herein, we successfully prepared high-quality Mn-doped BDACdBr₄ (BDA = NH₂(CH₂)₄NH₂, butylene diammonium) HLP single crystals (SCs). The incorporation of Mn²⁺ ions modulates the electronic band structure of BDACdBr₄ perovskites and tailors the energy transfer process of excited states. A near-unity photoluminescence (PL) quantum yield of 96% from the Mn²⁺ emission at 608 nm is achieved. Excitation wavelength-dependent spectroscopic characterizations help to clarify the energy transfer mechanism of Mn-doped BDACdBr₄, in which competing PL from the ³E_g → ¹A_1g transition of Cd²⁺ and the ⁴T₁(G) → ⁶A₁(S) transition of Mn²⁺ dopants is observed. Temperature-dependent PL spectroscopic characterizations indicate that the efficient energy transfer from BDACdBr₄ perovskite host to Mn²⁺ dopants requires thermal activation to overcome a potential barrier. This work provides new insight into the photophysics and optical properties of 2D HLPs, especially the influence of Mn²⁺ doping on competing energy transfer in hybrid luminescent materials.

Keywords: Mn-doped; energy transfer; excitation wavelength-dependent optical properties; photoluminescence; thermal activation; two-dimensional hybrid perovskites.