{'fraction_non_alphanumeric': 0.034722222222222224, 'fraction_numerical': 0.041666666666666664, 'mean_word_length': 5.455223880597015, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Synthesis, characterization and luminescence properties of CaMoO4:Eu3+ red phosphor for use in light-emitting diodes

CaMoO4:Eu3+ red phosphors were successfully synthesized by using a high-energy ball milling method. The X-ray diffraction patterns confirmed their tetragonal structure, and the field emission scanning electron microscopy images exhibited spherical particles. The photoluminescence properties (PL) of CaMoO4:Eu3+ phosphors were also studied as a function of the sintering temperature and the Eu3+ ion concentration. The PL excitation and the PL spectra demonstrated that CaMoO4 doped with 5 mol% of Eu3+ and sintered at 1200 °C showed an intense charge transfer band with a band maximum at around 303 nm and the strongest red emission at 618 nm (5D0 → 7F2) with Commision Internationale de I’Eclairage 1931 chromaticity coordinates (0.609, 0.343).