Database of Eu2+ and Ce3+ Doped Phosphors for Development of Violet-light Excited White LEDs

doi:10.15541/jim20250116

Abstract

Abstract:

Commercial phosphor-converted white LEDs (pc-WLEDs) face two inherent limitations, namely blue light hazard and low color rendering index, due to the use of blue LEDs as excitation source. To address these challenges, violet LEDs are proposed as an alternative solution. Currently, phosphors that can be efficiently excited by violet light (with wavelengths from 400 to 420 nm) remain under development still. In this study, we utilize large language models to construct a comprehensive database of Eu²⁺ and Ce³⁺ doped phosphors for discovering novel violet-excited phosphors. A total of 822 phosphor data entries, including elemental compositions, crystal structures and excitation/emission wavelengths, have been extracted and validated from 9551 research papers. Compared with Ce³⁺ doped phosphors, the Eu²⁺ are in general more suited for violet-excited phosphors, as well as red-emitting phosphors. In particular, Eu²⁺ doped nitrides and sulfides are worth of exploration for violet-excited phosphors. This database is expected to be useful in the future development of phosphors for pc-WLEDs based on artificial intelligence methods. The datasets in this article are listed in Science Data Bank at http://doi.org/10.57760/sciencedb.34314.

Key words: phosphor, violet LED, large language model, database

CLC Number:

TB34

ZHOU Zichun, ZHANG Xiang, MING Chen, SUN Yiyang. Database of Eu²⁺ and Ce³⁺ Doped Phosphors for Development of Violet-light Excited White LEDs[J]. Journal of Inorganic Materials, 2026, 41(3): 393-400.

Figures/Tables 5

Fig. 1 Literature analysis for (a) temporal distribution and (b) geographical distribution Colorful figures are available on website

Fig. 2 Overview of data processing workflow and classification of Eu2+ and Ce3+ doped phosphors (a) Flowchart of data mining and preprocessing; (b, c) Pie charts of compound types of (b) Eu2+ and (c) Ce3+ doped phosphors, with the outer rings also showing proportions of violet-excited phosphors in each type Colorful figures are available on website

Fig. 3 Relationship between excitation and emission wavelengths of Eu2+ doped phosphors (a) All compound types; (b) Oxides only; (c) Other four types; (d) Violet-excited phosphors. Note that in (d), the horizontal axis shows the peak positions of selected violet-excited phosphors based on a rule explained in the text

Fig. 4 Relationship between excitation and emission wavelengths of Ce3+ doped phosphors (a) All compound types; (b) Oxides only; (c) Other four types; (d) Violet-excited phosphors. Note that in (d), the horizontal axis shows the peak positions of selected violet-excited phosphors based on a rule explained in the text

Fig. 5 Distributions of (a) excitation and (b) emission wavelengths for Eu2+ and Ce3+ doped phosphors Colorful figures are available on website

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Database of Eu²⁺ and Ce³⁺ Doped Phosphors for Development of Violet-light Excited White LEDs

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