Emission‐Color‐Tunable Pb−Sn Alloyed Single Crystals with High Luminescent Efficiency and Stability. Issue 6 (25th January 2022)

• Record Type: Journal Article
• Authors: Liao, Jin‐Feng; Zhang, Zhipeng; Wei, Jun‐Hua; Zhang, Zhi‐Zhong; Wang, Bingzhe; Zhou, Lei; Xing, Guichuan; Tang, Zikang; Kuang, Dai‐Bin
• Is Part Of: Advanced optical materials. Volume 10:Issue 6(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-25
• Subjects: anti‐counterfeiting -- lead‐tin halides -- self‐trapped excitons -- tunable emission -- white light emission; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202102426
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Although multiple emissive materials are of great research interest due to their great potential in a variety of applications, it is still challenging to prepare highly luminescent color‐tunable phosphors. Herein, the authors report a series of Pb−Sn alloyed single crystals, (C10 NH22 )2 Pb1− x Sn x Br4 ( x = 0 to 1), that are equipped with two independent self‐trapped excitons (STEs) emitters. Multicolor luminescent output from blue to red and white light can be obtained by tailoring the composition, excitation wavelength, temperature, or time gating. More importantly, the synergistic effect between PbBr4 2− and SnBr4 2− enables (C10 NH22 )2 Pb1− x Sn x Br4 to have an extremely high luminescent efficiency up to near unity and remarkably extends stability in ambient air, significantly outperforming the monometallic (C10 NH22 )2 PbBr4 and (C10 NH22 )2 SnBr4 . As an encouraging result of the richly endowed emission property and robust stability, (C10 NH22 )2 Pb1− x Sn x Br4 is further employed in multifunctional applications including the luminescent radiometric thermometer, white light emitter, and high‐security anti‐counterfeit materials. Abstract : A series of dual‐emission Pb−Sn alloyed single crystals have been prepared with widely‐tunable luminescent color, extremely high luminescent efficiency up to near unity, and remarkably extended air stability, which have been demonstrated with great potential for applications in white light emitting, anti‐counterfeiting, and luminescent ratiometric thermometer.