TY - DATA T1 - Concentration-Driven Selectivity of Energy Transfer Channels and Color Tunability in Ba3La(PO4)3:Tb3+, Sm3+ for Warm White LEDs PY - 2017/06/16 AU - Weijie Zhou AU - Meng Gu AU - Yiyi Ou AU - Caihua Zhang AU - Xuejie Zhang AU - Lei Zhou AU - Hongbin Liang UR - https://acs.figshare.com/articles/journal_contribution/Concentration-Driven_Selectivity_of_Energy_Transfer_Channels_and_Color_Tunability_in_Ba_sub_3_sub_La_PO_sub_4_sub_sub_3_sub_Tb_sup_3_sup_Sm_sup_3_sup_for_Warm_White_LEDs/5116210 DO - 10.1021/acs.inorgchem.7b00737.s001 L4 - https://ndownloader.figshare.com/files/8687524 KW - CCT KW - emission color KW - chromaticity stability KW - interaction mechanisms KW - near-UV WLED KW - concentration-dependent 5 D 3 KW - ET processes KW - 5 D 3 KW - 5 D 4 channel KW - 5 D 4 emissions KW - concentration-driven selectivity KW - 5 D 3 channel KW - 5 D 4 channels KW - light-emitting diodes KW - PO 4 KW - Warm White LEDs KW - Energy Transfer Channels KW - Concentration-Driven Selectivity KW - emission color tunability KW - Sm KW - phosphor KW - Tb KW - BLPO KW - Color Tunability KW - doping concentrations KW - energy transfer N2 - Here, we report the large-scale emission color tunability in Ba3La­(PO4)3:Tb3+, Sm3+ (BLPO:TS) system based on the detailed discussion on the concentration-driven selectivity of energy transfer (ET) channels from Tb3+ to Sm3+. It is induced by the concentration-dependent 5D3 and 5D4 emissions of Tb3+ and the different interaction mechanisms of ET from Tb3+ to Sm3+ via 5D3 and 5D4 channels. In the diluted Tb3+ scenario, the red emission of Sm3+ is efficiently sensitized via the 5D3 channel, while in the concentrated Tb3+ case, the contribution of 5D4 channel is dominant. Therefore, by simply adjusting the doping concentrations of Tb3+ and Sm3+, the emission color of the phosphors can be tuned from green to red. In view of the phosphors with red emissions are critical to the warm white light-emitting diodes (WLEDs), an orange-red Tb3+, Sm3+ coactivated phosphor Ba3La0.90Tb0.05Sm0.05(PO4)3 (BLPO:5T5S) with good thermal and chromaticity stability and internal quantum efficiency ∼67% is developed in the system. Then, a near-UV WLED (CCT ≈ 4500 K, Ra ≈ 81) is fabricated using this phosphor. These findings not only indicate that the orange-red phosphor BLPO:5T5S is available for near-UV warm white LEDs but also deliver new insights into the ET processes in Tb3+ and Sm3+ activated phosphors. ER -