Carbon Dots with Blue-to-Near-Infrared Lasing for Colorful Speckle-Free Laser Imaging and Dynamical Holographic Display
© 2023 Wiley-VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 31 vom: 05. Aug., Seite e2302536 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2023
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| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article carbon dots concentrated excited-state energy levels full-color laser high radiative transition rate holographic display near-infrared laser speckle-free laser imaging |
| Zusammenfassung: | © 2023 Wiley-VCH GmbH. As a new solution-processable laser material, carbon dots (CDs) offer advantages of non-toxicity, low-cost, and high-stability, which are conducive to the sustainable development of miniaturized lasers. Full-color CDs (FC-CDs) with bright-blue, green, yellow, red, deep-red, and near-infrared (NIR) fluorescence are prepared. Their photoluminescence emission ranges from 431 to 714 nm. The FC-CDs show narrow full widths at half maximum in the range of 44-76 nm, with concurrent high radiative transition rates (KR ) of 0.54-1.74 × 108 s-1 ; their performance is comparable to that of organic laser dyes, indicating their good gain potential for lasers. Laser pumping of the FC-CDs gives laser outputs at 467.3, 533.5, 577.4, 616.3, 653.5, and 705.1 nm, spanning from blue to NIR region, and covering 140% of the NTSC color gamut. The FC-CDs show high Q-factors (2000-5500), appreciable gain coefficients (9-21.5 cm-1 ), and better stability (≈100%4-7 h) than commercial laser dyes. These excellent properties make them suitable for high-quality, colorful, speckle-free laser imaging and dynamic holographic display. The findings will be helpful in promoting the practical applications and development of solution-processable CD-based lasers |
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| Beschreibung: | Date Revised 03.08.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202302536 |