以下为句子列表：
英文: Phosphorescent electroluminescent materials and devices are one of prime focuses of organic light-emitting device research in recent years due to their ability to efficiently utilize both singlet and triplet excitons and having higher efficiency.
中文: 摘要有机电致磷光材料可以同时利用单线态和三线态激子发光，具有发光效率高等优点，成为近年来研究的热点。
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