{'fraction_non_alphanumeric': 0.03286384976525822, 'fraction_numerical': 0.02034428794992175, 'mean_word_length': 5.213592233009709, '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}}
Charge Transfer Luminescence of Yb3+ in Orthophosphates

Abstract Charge transfer luminescence of Yb3+ in the orthophosphates REPO4 (RE=Sc, Lu, Y, La) has been investigated. Yb3+ shows charge transfer luminescence in the orthophosphates of cations with a relative small radius (Sc, Lu, Y). In LaPO4, no proof for Yb3+ charge transfer luminescence has been found. The decay time of the charge transfer luminescence is about 150 ns in the three orthophosphates. The quenching temperature is around 250 K and is compared with the quenching temperature of Eu3+ luminescence in the orthophosphates after excitation in the charge transfer state.