TY - JOUR
T1 - Tunable photoluminescence and energy transfer of YBO 3:Tb 3+, Eu 3+ for white light emitting diodes
AU - Zhang, Xianwen
AU - Zhao, Zhi
AU - Zhang, Xin
AU - Marathe, Archis
AU - Cordes, David B.
AU - Weeks, Brandon
AU - Chaudhuri, Jharna
PY - 2013/11/21
Y1 - 2013/11/21
N2 - Rare-earth (Eu 3+, Tb 3+) ion co-doped YBO 3 phosphors with a morphology of uniform flower-like assembly are fabricated by a facile hydrothermal method without the use of surfactant, organic ligands, or further sintering treatment. Photoluminescence (PL) studies have demonstrated that under the excitation of 365 nm ultraviolet (UV) light, YBO 3:Tb 3+, Eu 3+ emits a white light, including three emissions: a blue band attributed to self-trapped excitons (STEs), a green band due to the Tb 3+ transition of 5D 4- 7F j (j = 6, 5, 4, and 3), and a red band due to the Eu 3+ transition of 5D 0- 7F j (j = 0, 1, 2, 3, and 4). Energy transfers from host YBO 3 to Tb 3+, and Eu 3+ and Tb 3+ to Eu 3+, as well as tunable emission by varying the relative doping ratios are demonstrated. The combination of blue emission from STEs with green and red emissions from activators provides a novel and efficient technique to make white light emitting diodes (WLEDs).
AB - Rare-earth (Eu 3+, Tb 3+) ion co-doped YBO 3 phosphors with a morphology of uniform flower-like assembly are fabricated by a facile hydrothermal method without the use of surfactant, organic ligands, or further sintering treatment. Photoluminescence (PL) studies have demonstrated that under the excitation of 365 nm ultraviolet (UV) light, YBO 3:Tb 3+, Eu 3+ emits a white light, including three emissions: a blue band attributed to self-trapped excitons (STEs), a green band due to the Tb 3+ transition of 5D 4- 7F j (j = 6, 5, 4, and 3), and a red band due to the Eu 3+ transition of 5D 0- 7F j (j = 0, 1, 2, 3, and 4). Energy transfers from host YBO 3 to Tb 3+, and Eu 3+ and Tb 3+ to Eu 3+, as well as tunable emission by varying the relative doping ratios are demonstrated. The combination of blue emission from STEs with green and red emissions from activators provides a novel and efficient technique to make white light emitting diodes (WLEDs).
UR - http://www.scopus.com/inward/record.url?scp=84886879173&partnerID=8YFLogxK
U2 - 10.1039/c3tc31200c
DO - 10.1039/c3tc31200c
M3 - Article
AN - SCOPUS:84886879173
SN - 2050-7534
VL - 1
SP - 7202
EP - 7207
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 43
ER -