Thermally Stable Red‐Emitting Oxide Ceramics for Laser Lighting
Bibliographic record
Abstract
Abstract Laser‐driven phosphor‐converted white light sources are highly desirable for their unprecedented energy efficiency and lighting quality. However, important challenges remain due to a lack of efficient and stable red‐emitting materials. Here Eu 2+ ‐activated oxide‐based double perovskites are explored as red emitters with thermally stable photoluminescence. Sr 3 TaO 5.5 :Eu 2+ ceramics exhibit a red emission band peaking at 620 nm upon blue laser pumping owing to the Eu 2+ occupation at highly ordered substitutional lattice sites. A constructed laser‐driven white light wheel under an incident power density of 19.2 W mm −2 presents a record luminous flux of 1115 lm with an excellent color rendering index of 90. This study invigorates the development of Eu 2+ ‐activated oxide‐based ceramics with thermally stable luminescence for laser‐pumped lighting and display applications.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".