A novel narrow-band red-emitting multi-layer phosphor for white – Light emitting devices
SrZr2La2O7: Eu+3 (0.5–2.5 mol %) phosphors have been synthesized through the standard solid-state reaction technique. The photoluminescent and other structural properties such as PXRD (Powder X-ray Diffraction), SEM (Scanning Electron Microscopy) and Energy Dispersive X-ray spectroscopy (EDX), FTIR...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-12-01
|
| Series: | Results in Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715623003399 |
| _version_ | 1797398652787884032 |
|---|---|
| author | Kishore Kumar Aitha D. Dinakar P. Indira A.S. Sai Prasad K.V.R. Murthy D. Haranath |
| author_facet | Kishore Kumar Aitha D. Dinakar P. Indira A.S. Sai Prasad K.V.R. Murthy D. Haranath |
| author_sort | Kishore Kumar Aitha |
| collection | DOAJ |
| description | SrZr2La2O7: Eu+3 (0.5–2.5 mol %) phosphors have been synthesized through the standard solid-state reaction technique. The photoluminescent and other structural properties such as PXRD (Powder X-ray Diffraction), SEM (Scanning Electron Microscopy) and Energy Dispersive X-ray spectroscopy (EDX), FTIR (Fourier transform infrared spectroscopy), PSD (Particle Size Distribution) of the phosphors were learned. The photoluminescence spectra show that the phosphor exhibited intense and dominant red emissions at 627 nm belonging to the 5D0 → 7F2 electric dipole transition. The FWHM of the red emissions at 627 nm is only 8.0 nm increasing in luminous efficacy. Hereby we propose a novel RED phosphor for RED emitting LEDs with phosphor-embedded polymer matrix layers of variable thickness and stacking up to 400 µm. The intensity of the red color was enhanced by self-excitation of photon absorption and emission. As a result, Eu3+doped SrZr2La2O7 phosphors can be widely used as red phosphors in UV chip-based WLEDs and displays. The phosphor exhibits high color purity up to 99% when excited at 590 nm. X-ray powder diffraction analysis confirms that the phosphor is highly crystalline and has a cubic phase. |
| first_indexed | 2024-03-09T01:28:40Z |
| format | Article |
| id | doaj.art-ca1fc67fff6f4593a8f11fadf64b8954 |
| institution | Directory Open Access Journal |
| issn | 2211-7156 |
| language | English |
| last_indexed | 2024-03-09T01:28:40Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Chemistry |
| spelling | doaj.art-ca1fc67fff6f4593a8f11fadf64b89542023-12-10T06:15:15ZengElsevierResults in Chemistry2211-71562023-12-016101100A novel narrow-band red-emitting multi-layer phosphor for white – Light emitting devicesKishore Kumar Aitha0D. Dinakar1P. Indira2A.S. Sai Prasad3K.V.R. Murthy4D. Haranath5Department of Physics, National Institute of Technology Warangal, Hanumakonda 506004, Telangana, India; Corresponding author.Department of Physics, National Institute of Technology Warangal, Hanumakonda 506004, Telangana, IndiaDepartment of Physics, Government Degree College, Ongole 523001, A.P, IndiaDepartment of Physics, Vasavi College of Engineering, Hyderabad, Telangana, IndiaApplied Physics Department, Faculty of Engineering & Technology, The M.S. University of Baroda, Vadodara 39001, Gujarat, IndiaDepartment of Physics, National Institute of Technology Warangal, Hanumakonda 506004, Telangana, IndiaSrZr2La2O7: Eu+3 (0.5–2.5 mol %) phosphors have been synthesized through the standard solid-state reaction technique. The photoluminescent and other structural properties such as PXRD (Powder X-ray Diffraction), SEM (Scanning Electron Microscopy) and Energy Dispersive X-ray spectroscopy (EDX), FTIR (Fourier transform infrared spectroscopy), PSD (Particle Size Distribution) of the phosphors were learned. The photoluminescence spectra show that the phosphor exhibited intense and dominant red emissions at 627 nm belonging to the 5D0 → 7F2 electric dipole transition. The FWHM of the red emissions at 627 nm is only 8.0 nm increasing in luminous efficacy. Hereby we propose a novel RED phosphor for RED emitting LEDs with phosphor-embedded polymer matrix layers of variable thickness and stacking up to 400 µm. The intensity of the red color was enhanced by self-excitation of photon absorption and emission. As a result, Eu3+doped SrZr2La2O7 phosphors can be widely used as red phosphors in UV chip-based WLEDs and displays. The phosphor exhibits high color purity up to 99% when excited at 590 nm. X-ray powder diffraction analysis confirms that the phosphor is highly crystalline and has a cubic phase.http://www.sciencedirect.com/science/article/pii/S2211715623003399Photoluminescence [PL]RED PhosphorNarrow emissionCascading absorption and emissionsMorphologyPhosphor |
| spellingShingle | Kishore Kumar Aitha D. Dinakar P. Indira A.S. Sai Prasad K.V.R. Murthy D. Haranath A novel narrow-band red-emitting multi-layer phosphor for white – Light emitting devices Results in Chemistry Photoluminescence [PL] RED Phosphor Narrow emission Cascading absorption and emissions Morphology Phosphor |
| title | A novel narrow-band red-emitting multi-layer phosphor for white – Light emitting devices |
| title_full | A novel narrow-band red-emitting multi-layer phosphor for white – Light emitting devices |
| title_fullStr | A novel narrow-band red-emitting multi-layer phosphor for white – Light emitting devices |
| title_full_unstemmed | A novel narrow-band red-emitting multi-layer phosphor for white – Light emitting devices |
| title_short | A novel narrow-band red-emitting multi-layer phosphor for white – Light emitting devices |
| title_sort | novel narrow band red emitting multi layer phosphor for white light emitting devices |
| topic | Photoluminescence [PL] RED Phosphor Narrow emission Cascading absorption and emissions Morphology Phosphor |
| url | http://www.sciencedirect.com/science/article/pii/S2211715623003399 |
| work_keys_str_mv | AT kishorekumaraitha anovelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT ddinakar anovelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT pindira anovelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT assaiprasad anovelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT kvrmurthy anovelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT dharanath anovelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT kishorekumaraitha novelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT ddinakar novelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT pindira novelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT assaiprasad novelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT kvrmurthy novelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices AT dharanath novelnarrowbandredemittingmultilayerphosphorforwhitelightemittingdevices |