PHOTOLUMINESCENT COMPOUNDS

摘要

Materials comprising an A/M/X compound are provided. An A/M/X compound is a compound comprising one or more A moieties, one or more M atoms and one or more X atoms, where the A moieties are selected from organic cations and elements from Group 1 of the periodic table, the M atoms are selected from elements from Group 14 of the periodic table, and the X atoms are selected from elements from Group 17 of the periodic table. The materials include two-phase materials.

主权项

1. A near-infrared radiation source comprising:
an incident radiation source configured to generate incident radiation at an incident wavelength; and a two-phase photoluminescent material comprising:
a first phase of a compound having a formula selected from AMX3, A2MX4, AM2X5 or A2MX6, where the A is selected from elements from Group 1 of the periodic table, the M is C, Ge, Sn or Pb, and X is selected from elements from Group 17 of the periodic table; and a second phase comprising a metal oxide of the formula (M′Oy′), to provide the two-phase material with the formula (AMX3)(1-x)(M′Oy′)x, (A2MX4)(1-x)(M′Oy′)x, (AM2X5)(1-x)(M′Oy′)x, or (A2MX6)(1-x)(M′Oy′)x, where 0.1≦x≦0.6 and y′=1, 1.5 or 2, where M′ is selected from elements of Groups 2-4 or elements of Groups 12-15 of the periodic table; wherein the two-phase photoluminescent material is configured such that it is irradiated by incident radiation from the incident radiation source when the source is on; the incident radiation and the two-phase photoluminescent material being characterized in that the material is able to absorb the incident radiation, whereby the material is induced to emit photoluminescence in the wavelength range of 700 to 2000 nm.