Tunable emission and the systematic study on energy-transfer properties of Ce3+- and Tb3+-co-doped Sr3(PO4)2 phosphors

Abstract

An emitting color tunable phosphor Sr 3 (PO 4 ) 2 : Ce 3? , Tb 3? was synthesized by the traditional high-temperature solid-state reaction method. The photoluminescence and energy-transfer (ET) properties of Ce 3? -and Tb 3? -doped Sr 3 (PO 4 ) 2 host were studied in detail. The obtained phosphors show both a blue emission from Ce 3? and a yellowish green emission from Tb 3? with considerable intensity under ultraviolet (UV) excitation (*311 nm). When the content of Ce 3? was fixed at 0.03, the emission chromaticity coordinates could be adjusted from blue to green region by tuning the contents of Tb 3? ions with the aid of ET process. The critical distance between Ce 3? and Tb 3? is 14.69 Å . The ET mechanism from Ce 3? to Tb 3? ions was identified with dipole-dipole interaction. The obtained phosphor exhibits a strong excitation in UV spectral region and high-efficient ET from Ce 3? to Tb 3? ions. It may find applications as a green light-emitting UV-convertible phosphor in white LED devices.

Layered Crystal Structure, Color-Tunable Photoluminescence, and Excellent Thermal Stability of MgIn2P4O14 Phosphate-Based Phosphors

“…As the Tm 3+ doping concentration x increases, the emission intensity first rises and then declines, peaking at x = 0.04, indicating a quenching effect when x > 0.04. According to Blasse’s report, the mean volume for per activator ion at quenching concentration can be written as − …”

Enhancement of the luminescence properties of Sr3(PO4)2:Dy3+,Li+ white‐light‐emitting phosphors by charge compensator Li+ co‐doping

“…For example, the Tb 3+ ‐doped Sr 3 (PO 4 ) 2 phosphor was synthesized by a sol–gel combustion method as a green light‐emitting UV‐convertible phosphor . Ce 3+ ‐ and Tb 3+ ‐co‐doped Sr 3 (PO 4 ) 2 phosphors have been prepared by solid‐state reaction, and their emission and energy‐transfer properties have been investigated . In addition, a double‐emitting blue phosphor Sr 3 (PO 4 ) 2 :Eu 2+ ,Dy 3+ was synthesized by solid‐state reaction under a H 2 atmosphere .…”

“…[16] Ce 3+and Tb 3+ -codoped Sr 3 (PO 4 ) 2 phosphors have been prepared by solid-state reaction, and their emission and energy-transfer properties have been investigated. [17] In addition, a double-emitting blue phosphor Sr 3 (PO 4 ) 2 :Eu 2+ ,Dy 3+ was synthesized by solid-state reaction under a H 2 atmosphere. [18] However, as far as we know, there have been few previous reports on Sr 3 (2%) were weighed out according to established stoichiometric ratios, and ground thoroughly in an agate mortar.…”