To facilitate phosphor-converted light-emitting diodes (LEDs) for plant growth, the development of phosphor materials with efficient red or far-red emission is essential. Herein, we report a novel CaSrZnGaO:0.15Mn (CSZG:Mn) phosphor with far-red emission synthesized via the traditional solid-state reaction. The structure, morphology and the effect of dopant concentration on the photoluminescence properties of CSZG:Mn were systematically investigated. These phosphors can efficiently be excited by near-ultraviolet (NUV)/blue LED chips, and exhibit highly efficient red emission in the range of 650-760 nm, which matches well with the absorption band of phytochrome. The as-fabricated LED, comprising the CSZG:Mn phosphor and a 460 nm blue InGaN chip, emits bright blue and red light. Owing to their high quantum efficiency (QE) value (∼75.8%), excellent thermal stability (∼97.9% at 425 K relative to that at RT), non-rare earth materials and mild preparation conditions, the CSZG:Mn phosphors have great potential as far-red emission phosphors in high-power plant growth LEDs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c8dt03740j | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Naphthalimide and Carbazole Based Mechanochromic Molecular Dyads and Triads for Selective Lysosome Imaging.
Chem Asian J
January 2025
IISc: Indian Institute of Science, Inorganic and Physical Chemistry, Indian Institute of Science Bangalore, 560012, Bangalore, INDIA.
In this study, we report the design and development of a stable fluorescent probe that is selectively localized in the cytosol of Hela cells. We designed two probes, 1 and 2, with D-π-A (carbazole (Cbz)-vinyl-naphthalimide (NPI)) and A-π-D-π-A (NPI-vinyl-Cbz-vinyl-NPI) architecture, respectively. Probes 1 and 2 exhibit broad photoluminescence (PL) spectra ranging from green (550 nm) to far-red (800 nm) in solutions and aggregated states.
View Article and Find Full Text PDFSynergetic Contributions of High Quenching Concentration and Tuned Square Antiprism Geometry Boosting Far-Red Emission of Eu with Near-Unit Efficiency.
Adv Sci (Weinh)
January 2025
Yunnan Key Laboratory of Electromagnetic Materials and Devices, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, China.
Far-red phosphors have emerged as a desirable research hotspot owing to their critical role in promoting plant growth. Especially, Eu ions typically present the D→F (J = 0, 1, 2, 3, 4) transitions, which overlap with the far-red light required for plant photosynthesis. However, achieving high-efficiency far-red emission of Eu remains challenging due to weak D→F transition and concentration quenching.
View Article and Find Full Text PDFInterstitial Oxygen-Driven Far-Red/Near-Infrared Emission and Efficiency Enhancement via Heterovalent Cation Substitution in CaWO Phosphors.
Inorg Chem
January 2025
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Material Science and Engineering, Shandong University, Jinan 250061, P. R. China.
In this work, CaWO (CWO) phosphors were successfully synthesized using a high-temperature solid-state method, exhibiting an anomalous far-red/near-infrared (FR-NIR) emission centered at 685 nm. The origin of this FR-NIR emission is confirmed through Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), density functional theory (DFT) calculations, and heterovalent cationic substitution (Y/Na → Ca). These analyses indicate that interstitial oxygen (O) defects within the lattice are primarily responsible for the FR-NIR emission.
View Article and Find Full Text PDFTwo-photon brightness of NIR-emitting, atomically precise DNA-stabilized silver nanoclusters.
Chem Sci
December 2024
Institute of Advanced Materials, Wroclaw University of Science and Technology Wrocław Poland
Near-infrared (NIR) emitters with high two-photon absorption (2PA) cross-sections are of interest to enable imaging in the tissue transparency windows. This study explores the potential of DNA-stabilized silver nanoclusters (Ag -DNAs) as water-soluble two-photon absorbers. We investigate 2PA of four different atomically precise Ag -DNA species with far-red to NIR emission and varying nanocluster and ligand compositions.
View Article and Find Full Text PDFAchieving Thermally Stable YAlGa(BO):Cr Near-Infrared Emitting Phosphors via Chemical Substitution for Plant Growth LEDs.
Inorg Chem
December 2024
Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China.
Article Synopsis
- Increased interest in indoor plant cultivation is driven by the need for sustainable agriculture, with phosphor-converted LEDs (pc-LEDs) showing promise for plant growth regulation.
- The study introduces a new phosphor, YAlGa(BO):Cr, which achieves a better alignment for far-red phytochrome absorption due to chemical substitution, resulting in enhanced near-infrared (NIR) emissions.
- Experiments reveal that using NIR light from these specially designed pc-LEDs significantly boosts the growth of pea plants, improving root and stem lengths by 127% and 225%, respectively.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!