Tunable Multicolor Fluorescence of Perovskite-Based Composites for Optical Steganography and Light-Emitting Devices
Open Access
- 13 September 2022
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Research
- Vol. 2022, 9896548
- https://doi.org/10.34133/2022/9896548
Abstract
Multicolor fluorescence of mixed halide perovskites enormously enables their applications in photonics and optoelectronics. However, it remains an arduous task to obtain multicolor emissions from perovskites containing single halogen to avoid phase segregation. Herein, a fluorescent composite containing Eu-based metal-organic frameworks (MOFs), 0D Cs4PbBr6, and 3D CsPbBr3 is synthesized. Under excitations at 365nm and 254nm, the pristine composite emits blue (B) and red (R) fluorescence, which are ascribed to radiative defects within Cs4PbBr6 and 5D07FJ transitions of Eu3+, respectively. Interestingly, after light soaking in the ambient environment, the blue fluorescence gradually converts into green (G) emission due to the defect repairing and 0D-3D phase conversion. This permanent and unique photochromic effect enables anticounterfeiting and microsteganography with increased security through a micropatterning technique. Moreover, the RGB luminescence is highly stable after encapsulation by a transparent polymer layer. Thus, trichromatic light-emitting modules are fabricated by using the fluorescent composites as color-converting layers, which almost fully cover the standard color gamut. Therefore, this work innovates a strategy for construction of tunable multicolor luminescence by manipulating the radiative defects and structural dimensionality.Keywords
Funding Information
- Natural Science Foundation of Jiangsu Province (BK20190697)
- National Natural Science Foundation of China (11604155, 21802074, 61901222)
- Taishan Scholar Project of Shandong Province (tsqn201909117)
- Natural Science Foundation of Shandong Province (ZR2021YQ32)
This publication has 53 references indexed in Scilit:
- Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color GamutNano Letters, 2015
- The Chemistry and Applications of Metal-Organic FrameworksScience, 2013
- Simultaneous phase and size control of upconversion nanocrystals through lanthanide dopingNature, 2010
- Lanthanide luminescence for functional materials and bio-sciencesChemical Society Reviews, 2009
- Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic CellsJournal of the American Chemical Society, 2009
- Recent advances in the chemistry of lanthanide-doped upconversion nanocrystalsChemical Society Reviews, 2009
- Luminescent metal–organic frameworksChemical Society Reviews, 2009
- Near-Infrared Luminescence from Sol−Gel Materials Doped with Holmium(III) and Thulium(III) ComplexesThe Journal of Physical Chemistry C, 2008
- Doped NanocrystalsScience, 2008
- Taking advantage of luminescent lanthanide ionsChemical Society Reviews, 2005