Highly Reversible Moisture-Induced Bright Self-Trapped Exciton Emissions in a Copper-Based Organic-Inorganic Hybrid Metal Halide

Fang, Shaofan1; Zhou, Bo1; Li, Huixia1,2,3; Hu, Hanlin4; Zhong, Haizhe5; Li, Henan; Shi, Yumeng1

2022-05-01

10.1002/adom.202200605

Advanced Optical Materials   影响因子和分区

2195-1071

Metal halide perovskites are promising optoelectronic materials due to their unique luminescent properties. However, their practical application is limited by their poor chemical stability, especially in humid environments. Moisture can cause phase changes or chemical decomposition, resulting in significant fluorescence quenching. In this study, a copper-based organic-inorganic hybrid metal halide (t-BA)(3)Cu6I9 is synthesized (t-BA(+) is the tert-butyl-ammonium ion (C(CH3)(3)NH3+)). This material exhibits water-induced luminescence, and its chemical stability in humid environments is being investigated. Tetragonal t-BA(3)Cu(6)I(9) is not luminescent, but it reacts quickly with water in the air. The resultant (t-BA)(2)Cu2I4 center dot H2O has a broad green emission peak at 520 nm, high photoluminescence quantum yield of 59.4%. Remarkably, (t-BA)(2)Cu2I4 center dot H2O is converted back to t-BA(3)Cu(6)I(9) at temperatures above 40 degrees C. This phase conversion is highly repeatable, and the luminescent intensity can be fully recovered after 50 transformation cycles. The mechanism of luminescence is investigated through temperature-dependent photoluminescence spectra and theoretical calculation, which suggests that (t-BA)(2)Cu2I4 center dot H2O has a more localized charge distribution and sufficient polyhedral distortion, resulting in a bright and efficient emission from self-trapped excitons. This is the first report of water-induced luminescence in copper-based metal halides, and it paves the way for stable luminescent materials that are responsive to humidity.

copper-based metal halides moisture reduced luminescence self-trapped excitons

SCI ; EI

英语

其他

National Natural Science Foundation of China[61874074] ; Key Project of Department of Education of Guangdong Province[2016KZDXM008] ; Technology and Innovation Commission of Shenzhen[20200810164814001] ; Natural Science Foundation of Guangdong Province[2022A1515012055] ; Shenzhen Peacock Plan[KQTD2016053112042971]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:000797887300001

WILEY-V C H VERLAG GMBH

20222112151001

Chemical stability ; Copper compounds ; Excitons ; Metals ; Moisture ; Optoelectronic devices ; Perovskite ; Quenching

Minerals:482.2 ; Heat Treatment Processes:537.1 ; Optical Devices and Systems:741.3 ; Chemistry:801 ; Chemical Products Generally:804

Web of Science

1.Shenzhen Univ, Coll Elect & Informat Engn, Shenzhen 518060, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Key Lab Municipal Solid Waste Recycling Technol &, Shenzhen 518055, Peoples R China
4.Shenzhen Polytech, Hoffmann Inst Adv Mat, Shenzhen 518000, Peoples R China
5.Shenzhen Univ, Int Collaborat Lab 2D Mat Optoelect Sci & Technol, Minist Educ, Inst Microscale Optoelect, Shenzhen 518060, Peoples R China

Fang, Shaofan,Zhou, Bo,Li, Huixia,et al. Highly Reversible Moisture-Induced Bright Self-Trapped Exciton Emissions in a Copper-Based Organic-Inorganic Hybrid Metal Halide[J]. Advanced Optical Materials,2022,10.

Fang, Shaofan.,Zhou, Bo.,Li, Huixia.,Hu, Hanlin.,Zhong, Haizhe.,...&Shi, Yumeng.(2022).Highly Reversible Moisture-Induced Bright Self-Trapped Exciton Emissions in a Copper-Based Organic-Inorganic Hybrid Metal Halide.Advanced Optical Materials,10.

Fang, Shaofan,et al."Highly Reversible Moisture-Induced Bright Self-Trapped Exciton Emissions in a Copper-Based Organic-Inorganic Hybrid Metal Halide".Advanced Optical Materials 10(2022).