IDEA #39TOUC NEW ANTI – STOKES LUMINOPHORS AND LASER MEDIUMS ON THE BASE OF II-III 2 - VI4 TYPED WIDE-BAND CHALCOGENIDE SEMICONDUCTORS DOPED BY RARE-EARTH ELEMENTS

NEW ANTI – STOKES LUMINOPHORS AND LASER MEDIUMS ON THE - VI4 TYPED WIDE-BAND CHALCOGENIDE BASE OF II-III 2 SEMICONDUCTORS DOPED BY RARE-EARTH ELEMENTS length is activation Therefore systems of lines where data carrier Description Traditional investigations, synthesis and use of anti – Stokes luminophors (ASL) have an objective to visualize IR-radiation, i.e. IR-signal conversion into visible band (0.38÷ 0.76mkm). Recently there have fiber optic been created communication the radiation with wavelength about 1.55 mkm. There have been developed lasers on the base of erbium glasses with wavelength of generation 1.54÷1.65 mkm. of wide-band semiconductive compounds EuGa2S4 and YbGa2S4 by 4f-elements, study of impurity state and behavior is one of the central issues of physics and material science of semiconductors as a whole. Nowadays complex rare – earth compounds of VI- S,Se) – MIM2 typed take a special place among wide - band semiconductors. VI - typed crystals have been crystallized in IIX4 MIM2 are high –resistance rhombic singony, (105÷10IIOhm/cm), (~4.4eV) semiconductors and show particularly pronounced luminescent and photoconductive properties. VI (MI -Eu, Yl,Sm; MII-Ga,In; X4 wide-band IIX4 they In according with above- mentioned it is of interest spectroscopic investigation of 4f-elements in Eu (Yb) Ga2S4 crystals. There has been developed technology of II-III2 - IV2 (II-Eu, Yb,Sm,Ca, Sr,Ba; III-Ga,Al;VI-S,Se,O) - typed semiconductors activated by rare-earth ions. necessity properties. This Innovative Aspects and Main Advantages Production of effective devices for visualization and illumination, being able to compete with traditional systems requires to manufacture luminophors with specific promotes development of new materials and optimization of existing luminophors. İn this aspect perspective ones are ternary alkali-earth chalcogenide semiconductors of II-III2 - IV2 (II-Eu, Yb,Sm,Ca, Sr,Ba; III-Ga,Al;VI- S,Se,O) – typed activated by rare-earth ions. One of the qualities of ternary compounds comparing favourably with binary one as regards applied use is the resistance to hydrolysis and good implantation of rare-earth ions into crystal lattice. High linearity of cathode luminescence at high densities of current makes them suitable for use as a luminophor in TV and Selection of corresponding sensitizers and activators one can change efficiency of conversion of various kinds of energy into light one and luminescence colors of these compounds. ionization displays. field Areas of Application Systems of fiber optic communication lines, lasers with wavelength of generation 1.54-1/65mkm, night vision equipments. Stage of Development Development phase - laboratory tested. Fig.1……… Fig.2…………. Contact Details Institute of Physics Contact person: Tagiev Oktay Bahadur Address: 33, H. Javid Avenue AZ1143, Baku, Azerbaijan Tel: (994 12) 439 6795 Fax: (994 12) 447 0456 E-mail: oktay58@mail.ru