TY - JOUR
T1 - Tunable blue–green–emitting Na4CaSi3O9:Ce3+,Li+,Tb3+ phosphor with energy transfer for near-UV white LEDs
AU - Miao, S.
AU - Hu, J.
AU - Gao, M.
AU - Zeng, J.
AU - Wang, X.
AU - Liu, F.
AU - Zhou, S.
AU - Li, D.
AU - Liu, J.
AU - Li, C.
AU - Liang, K.
AU - Kong, B.
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/9
Y1 - 2020/9
N2 - Phosphor-converted white light emitting diodes (w-LEDs), with high luminous efficiency, low energy consumption, extended lifetime, and eco-friendly nature, have revolutionized various industries. Among them, an alkaline earth silicate-based phosphor host, Na4CaSi3O9, shows good crystal structure stability and flexible properties for diverse application. Here, Ce3+/Li+ singly doped and Ce3+/Li+/Tb3+ co-doped Na4CaSi3O9 phosphors are fabricated by the standard solid-state reaction approach. The Ce3+/Li+-activated phosphors show strong absorption within 200–400 nm and exhibit a blue emission centered at 423 nm. The quenching concentration of Ce3+ appears at x = 0.05 and can be attributed to the dipole–quadrupole interaction. When Tb3+ ions are co-doped, the Na4CaSi3O9:Ce3+,Li+,Tb3+ phosphor emission can be adjusted from blue to green under the irradiation of 365 nm through the dipole–dipole interaction induced energy transfer from Ce3+ to Tb3+ ions with a maximum value of 28.32%. This study highlights the Na4CaSi3O9:Ce3+,Li+,Tb3+ phosphors as a new and efficient material for w-LED applications.
AB - Phosphor-converted white light emitting diodes (w-LEDs), with high luminous efficiency, low energy consumption, extended lifetime, and eco-friendly nature, have revolutionized various industries. Among them, an alkaline earth silicate-based phosphor host, Na4CaSi3O9, shows good crystal structure stability and flexible properties for diverse application. Here, Ce3+/Li+ singly doped and Ce3+/Li+/Tb3+ co-doped Na4CaSi3O9 phosphors are fabricated by the standard solid-state reaction approach. The Ce3+/Li+-activated phosphors show strong absorption within 200–400 nm and exhibit a blue emission centered at 423 nm. The quenching concentration of Ce3+ appears at x = 0.05 and can be attributed to the dipole–quadrupole interaction. When Tb3+ ions are co-doped, the Na4CaSi3O9:Ce3+,Li+,Tb3+ phosphor emission can be adjusted from blue to green under the irradiation of 365 nm through the dipole–dipole interaction induced energy transfer from Ce3+ to Tb3+ ions with a maximum value of 28.32%. This study highlights the Na4CaSi3O9:Ce3+,Li+,Tb3+ phosphors as a new and efficient material for w-LED applications.
KW - Dipole–dipole interaction
KW - Fluorescent
KW - Luminescence
KW - Solid-state reaction
KW - White light emitting diodes
UR - http://www.scopus.com/inward/record.url?scp=85083287873&partnerID=8YFLogxK
U2 - 10.1016/j.mtsust.2020.100036
DO - 10.1016/j.mtsust.2020.100036
M3 - Article
AN - SCOPUS:85083287873
SN - 2589-2347
VL - 9
JO - Materials Today Sustainability
JF - Materials Today Sustainability
M1 - 100036
ER -