A novel red emitting phosphor LiBaB9 O15 :Sm2+ /Sm3+ , li+ with broad excitation band for white LEDs
| Autor: | Qiongyu Bai, Ting Li, Panlai Li, Shuchao Xu, Zhijun Wang, Zhiping Yang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Biophysics Analytical chemistry Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Spectral line 0104 chemical sciences law.invention X-ray photoelectron spectroscopy Chemistry (miscellaneous) law Chromaticity 0210 nano-technology Luminescence Excitation Diode Light-emitting diode |
| Zdroj: | Luminescence. 33:438-442 |
| ISSN: | 1522-7235 |
| DOI: | 10.1002/bio.3432 |
| Popis: | A novel tunable red emitting phosphor LiBaB9 O15 :Sm2+ /Sm3+ , Li+ with broad excitation band was synthesized by a high temperature solid-state method. Luminescence properties were investigated in detail by luminescence, X-ray photoelectron spectroscopy (XPS) spectra and CIE chromaticity coordinates. XPS data confirmed that there were Sm3+ in LiBaB9 O15 :Sm3+ and Sm2+ /Sm3+ in LiBaB9 O15 :Sm2+ /Sm3+ , respectively. Spectral property of LiBaB9 O15 :Sm3+ , LiBaB9 O15 :Sm3+ /Sm2+ and LiBaB9 O15 :Sm2+ , Li+ presented that the excitation band of Sm3+ widened and the excitation band of Sm2+ ranged from 350 to 450 nm. And the red light color is tunable with changing Li+ concentration. The results indicated that LiBaB9 O15 :Sm2+ /Sm3+ , Li+ may be promising red phosphor for white light emitting diodes. |
| Databáze: | OpenAIRE |
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