Issue 4, 2021

Alkylamine screening and zinc doping of highly luminescent 2D tin-halide perovskites for LED lighting

Abstract

In recent years, two-dimensional (2D) layered tin halide perovskites have attracted much attention due to their excellent luminescence properties compared with their three-dimensional (3D) analogs. Here, we synthesized 2D perovskites of the form (RNH3)2SnBr4 through a facile hot-injection approach without the use of toxic tri-n-octylphosphine (TOP) as the solvent. We found that these compounds have strong photoluminescence (PL) emission with high PL quantum yields (QY) of 35% ((C6H13NH3)2SnBr4), 82% ((C8H17NH3)2SnBr4), 60% ((C12H25NH3)2SnBr4) and 50% ((C18H35NH3)2SnBr4). Among them, ((C6H13NH3)2SnBr4) was synthesized for the first time; however, (C18H36NH3)2SnBr4 perovskites showed the best stability with a PL QY decrease of less than 1% after 30 days under ambient air and humidity conditions. In addition, other 2D (C8H17NH3)2SnX4 (X = Br, I, or mixture) perovskites were prepared by adjusting the halide ratio, resulting in spectral tunability from yellow to red. Interestingly, through Zn2+ doping, the morphology became more uniform, and the PL stability was significantly improved. Finally, we used Zn2+-doped (C8H17NH3)2SnBr4 yellow phosphor to fabricate UV-pumped yellow LEDs. We expect these 2D perovskites to be promising phosphors in future solid-state lighting and display technologies.

Graphical abstract: Alkylamine screening and zinc doping of highly luminescent 2D tin-halide perovskites for LED lighting

Supplementary files

Article information

Article type
Paper
Submitted
28 10 2020
Accepted
07 1 2021
First published
09 1 2021
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2021,2, 1320-1327

Alkylamine screening and zinc doping of highly luminescent 2D tin-halide perovskites for LED lighting

Y. Liu, A. Wang, J. Wu, C. Wang, Z. Li, G. Hu, S. Sui, J. She, W. Meng, W. Li and Z. Deng, Mater. Adv., 2021, 2, 1320 DOI: 10.1039/D0MA00845A

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