New Invention Profile
| Publication No: | IN202211051217 [India] | Application No: | 202211051217 |
| Title: | A process for preparation of stable single phase intrinsic white light emitting phosphors and application thereof | ||
| Publication Date: | 08-03-2024 | File Date: | 07-09-2022 |
| Inventor(s): | Yatendra Singh Chaudhary; Asish Kumar Dehury | ||
| IPC Classification: | H04W36/00, E04H9/02, G06F3/0488, H02K1/28, G09G3/325 | ||
| Abstract: | The present invention relates to a process of preparation of highly luminescent single phase intrinsic white light emitting materials (phosphors) by a simple and facile approach (hydrothermal) followed by two step calcination. More particularly, the present invention provides a novel co-doped strontium cerium oxide phosphors synthesized by partially substituting strontium by two divalent ions e.g., magnesium and zinc to exhibit average lifetime ranging from 31 to 44 ?s and the tunable photoluminescence quantum efficiency (PLQY) ranging from 15% to 95 %, tunable chromaticity coordinates (0.238 to 0.300, 0.329 to 0.372). Taking into account these characteristics, a white light emitting prototype was fabricated by combining a 365 nm UV-LED chip and single phase intrinsic white light emitting materials (phosphors), exhibiting highly intense broad emission over the spectral range (400-700 nm) with tunable color rendering index (CRI) from 85 to 95 and CCT from 4900 to 5700 K (cool to warm region). The single phase intrinsic white light emitting materials (phosphors) developed in present invention exhibiting broad excitation and emission spectrum, high CRI, PLQY and daylight CCT can be used in various optoelectronic Application including the w-LEDs, display panels etc. | ||
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