Phonon-assisted upconversion photoluminescence in Mn-doped two-dimensional hybrid metal halides

Author:

Zhao Fuli1,Li Junzi2,Lin Xiaodong2,He Tingchao2ORCID

Affiliation:

1. School of Electronic and Information, Shanghai Dianji University, Shanghai 200240, P. R. China

2. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P. R. China

Abstract

Phonon-assisted upconversion process is one of the important means to generate upconversion photoluminescence (UCPL), and has important applications in laser refrigeration and other fields. However, until now, the studies on UCPL behavior are still insufficient. Herein, this work synthesizes a series of Mn-doped two-dimensional hybrid metal halide (2D HMH) thin films and investigates their optical properties using various spectral techniques. Raman spectroscopic measurement confirms that Mn-doping is achieved via interstitial doping rather than Pb-substitution. By the measurement of the temperature-dependent PL spectrum, it is found that Mn-doping will weaken the thermal expansion effect of 2D HMHs, but will enhance the electron–phonon coupling strength. More importantly, both two-photon-excited and phonon-assisted UCPL are observed in Mn-doped 2D HMHs, with an extremely large phonon-assisted energy gain (approximately 500[Formula: see text]meV). Our experimental results are of significance for designing phonon-assisted UCPL materials and expanding their applications.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Guangdong Province

Science and Technology Planning Project of Shenzhen Municipality

Publisher

World Scientific Pub Co Pte Ltd

Subject

Physics and Astronomy (miscellaneous),Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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1. Editorial: Special Issue on Nonlinear Optical Physics of 2D Materials;Journal of Nonlinear Optical Physics & Materials;2024-02

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