Journal
ADVANCED SCIENCE
Volume 8, Issue 19, Pages -Publisher
WILEY
DOI: 10.1002/advs.202101407
Keywords
high color rendering; machine-learning; single-phase white phosphors; tunable color temperature
Categories
Funding
- National Agency for Research [ANR-16-CE08-0003-01, ANR-21-ERCC-0009-01]
- Region Pays de la Loire (Etoiles montantes en Pays de la Loire 2017, project Decouverte de perovskites hybrides assistee par ordinateur)
- National Natural Science Foundation of China [51872217, 51472188, 51521001]
- Natural Research Funds of Hubei Province [2016CFB583]
- Fundamental Research Funds for the Central Universities in China
- 111 project [B13035]
- China Scholarship Council (CSC)
- Agence Nationale de la Recherche (ANR) [ANR-16-CE08-0003, ANR-21-ERCC-0009] Funding Source: Agence Nationale de la Recherche (ANR)
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Designing new single-phase white phosphors for solid-state lighting is a challenging trial-error process that requires navigation in a multidimensional space. With the guidance of machine learning models, a series of luminescent hybrid lead halides with ultra-high color rendering have been precisely designed.
Designing new single-phase white phosphors for solid-state lighting is a challenging trial-error process as it requires to navigate in a multidimensional space (composition of the host matrix/dopants, experimental conditions, etc.). Thus, no single-phase white phosphor has ever been reported to exhibit both a high color rendering index (CRI - degree to which objects appear natural under the white illumination) and a tunable correlated color temperature (CCT). In this article, a novel strategy consisting in iterating syntheses, characterizations, and machine learning (ML) models to design such white phosphors is demonstrated. With the guidance of ML models, a series of luminescent hybrid lead halides with ultra-high color rendering (above 92) mimicking the light of the sunrise/sunset (CCT = 3200 K), morning/afternoon (CCT = 4200 K), midday (CCT = 5500 K), full sun (CCT = 6500K), as well as an overcast sky (CCT = 7000 K) are precisely designed.
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