A white long-lasting phosphor Y(2)O(2)S:Tb(3+), Sm(3+): an improvement of Y(2)O(2)S:Tb(3+)

作者：Lin Lin^*; Chen Kun; Wang Zhifang; You Baogui; Chen Yonghu; Zhang Weiping; Shi Chaoshu

来源：Journal of Rare Earths, 2008, 26(5): 648-651.

DOI：10.1016/S1002-0721(08)60154-4

• terbium
• samarium
• white
• long-lasting phosphor
• rare earths

As an improvement of reported Y(2)O(2)S:Tb(3+), a white-light long-lasting phosphor: Y(2)O(2)S:Tb(3+), Sm(3+) was prepared by the solid-state reaction. The photo-luminescence spectra showed that the position and shape of Tb(3+) and Sm(3+) emissions under UV excitation were similar in this host, which ensured a stable white emission color (daylight standard of IEC) under different excitations. The decay curves of co-doped samples indicated that the decay times of emissions of the two ions were close. The thereto-luminescence measurement suggested that the traps created by the doped Sm(3+) ions were helpful to postpone the white afterglow of co-doped samples. Therefore, the function of co-doped Sm(3+) ions was confirmed as improving the white emission colors of samples and acting as new trap centers.

• 出版日期2008-10
• 单位福建师范大学; 中国科学技术大学