Water-resistant and flexible all-inorganic perovskite nanocrystals films for white light-emitting applications
| Autor: | Changsong Chen, Wan Y. Shih, Yihua Wu, Zhi-Gang Zhu, Wei-Heng Shih |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Photoluminescence Materials science business.industry Mechanical Engineering Composite number 02 engineering and technology Color temperature 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences law.invention Crystallinity Mechanics of Materials law 0103 physical sciences Water environment Optoelectronics General Materials Science Chromaticity 0210 nano-technology business Perovskite (structure) Light-emitting diode |
| Zdroj: | Journal of Materials Research. 36:1835-1845 |
| ISSN: | 2044-5326 0884-2914 |
| Popis: | All-inorganic perovskite materials have many advantages such as adjustable emission range, narrow emission peaks, and good crystallinity, which have attracted widespread interest. They can be used as solar cells, LEDs, photodetectors, displays, and other optoelectronic devices. However, poor environmental stability is the major factor limiting its applications. We introduced a Poly(styrene-ethylene-butylene-styrene) SEBS polymer to create perovskite/SEBS composite films which have excellent stability even in the water environment. Besides, due to the elastic nature of SEBS, the composite films exhibited good mechanical deformability and could maintain most of its fluorescence intensity after being stretched hundreds of times. A WLED device was constructed by stacking CsPbBr3/SEBS films and CsPbI3/SEBS films over a blue LED. The WLED performed well with color rendering index of 82.6 with chromaticity coordination (0.35, 0.36) and color temperature 4784 K. In order to create a stable and flexible photoluminescent material, we combined a poly(styrene-ethylene-butylene-styrene) (SEBS) polymer and cesium lead-halide nanocrystals forming a flexible photoluminescent composite. The composite films show both good environment stability and excellent flexibility. |
| Databáze: | OpenAIRE |
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