Study of the Effect of Injection Currents on White Light Emission of Ce-Doped YAG Phosphor Powder Prepared by Microwave Combustion
The behaviors of yttrium aluminum garnet (YAG) phosphor powder doped by cerium (YAG:Ce3+) was studied. Here, the YAG:Ce3+ nanopowders have been synthesized using microwave combustion (MW) according to the formula, Y(3-0.04) Al5O12: 0.04Ce3+ to produce white light emitting diode (WLEDs) by conversion...
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| Veröffentlicht in: | Solid state phenomena 2020-03, Vol.301, p.60-68 |
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| creator | Omar, A.F. Ahmed, Naser Mahmoud Abd, Husnen R. Lau, Khai Shenn Hassan, Zainuriah Alsultany, Forat Hamzah |
| description | The behaviors of yttrium aluminum garnet (YAG) phosphor powder doped by cerium (YAG:Ce3+) was studied. Here, the YAG:Ce3+ nanopowders have been synthesized using microwave combustion (MW) according to the formula, Y(3-0.04) Al5O12: 0.04Ce3+ to produce white light emitting diode (WLEDs) by conversion from blue indium gallium nitride light emitting diode (InGaN LED, 445 nm) chips; the whole process took only 20 min. Pure YAG phase was obtained after annealing at 1050 °C for 5 h with nonaggregated and spherical particles. Thermogravimetry and derivative thermogravimetry (TG/DTG), X-ray powder diffraction (XRPD), transmission electron microscope (TEM), photoluminescence (PL), electroluminescence (EL) emissions and standard CIE 1931 chromaticity diagrams have been used to characterize the samples. The highest WLEDs emission was achieved for the annealed YAG:Ce3+, together with proper color rendering index (CRI), and tunable correlated color temperature (CCT). Finally, we conclude that the decreasing EL intensity at increased injection current is caused by the thermal ionization from the 5d1 level to the conduction band. |
| doi_str_mv | 10.4028/www.scientific.net/SSP.301.60 |
| format | Article |
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Here, the YAG:Ce3+ nanopowders have been synthesized using microwave combustion (MW) according to the formula, Y(3-0.04) Al5O12: 0.04Ce3+ to produce white light emitting diode (WLEDs) by conversion from blue indium gallium nitride light emitting diode (InGaN LED, 445 nm) chips; the whole process took only 20 min. Pure YAG phase was obtained after annealing at 1050 °C for 5 h with nonaggregated and spherical particles. Thermogravimetry and derivative thermogravimetry (TG/DTG), X-ray powder diffraction (XRPD), transmission electron microscope (TEM), photoluminescence (PL), electroluminescence (EL) emissions and standard CIE 1931 chromaticity diagrams have been used to characterize the samples. The highest WLEDs emission was achieved for the annealed YAG:Ce3+, together with proper color rendering index (CRI), and tunable correlated color temperature (CCT). Finally, we conclude that the decreasing EL intensity at increased injection current is caused by the thermal ionization from the 5d1 level to the conduction band.</description><identifier>ISSN: 1012-0394</identifier><identifier>ISSN: 1662-9779</identifier><identifier>EISSN: 1662-9779</identifier><identifier>DOI: 10.4028/www.scientific.net/SSP.301.60</identifier><language>eng</language><publisher>Zurich: Trans Tech Publications Ltd</publisher><subject>Aluminum ; Annealing ; Cerium ; Chromaticity ; Color temperature ; Combustion ; Conduction bands ; Electroluminescence ; Emission analysis ; Indium gallium nitrides ; Injection current ; Light emission ; Light emitting diodes ; Phosphors ; Photoluminescence ; Thermogravimetry ; White light ; X ray powder diffraction ; Yttrium ; Yttrium-aluminum garnet</subject><ispartof>Solid state phenomena, 2020-03, Vol.301, p.60-68</ispartof><rights>2020 Trans Tech Publications Ltd</rights><rights>Copyright Trans Tech Publications Ltd. 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Here, the YAG:Ce3+ nanopowders have been synthesized using microwave combustion (MW) according to the formula, Y(3-0.04) Al5O12: 0.04Ce3+ to produce white light emitting diode (WLEDs) by conversion from blue indium gallium nitride light emitting diode (InGaN LED, 445 nm) chips; the whole process took only 20 min. Pure YAG phase was obtained after annealing at 1050 °C for 5 h with nonaggregated and spherical particles. Thermogravimetry and derivative thermogravimetry (TG/DTG), X-ray powder diffraction (XRPD), transmission electron microscope (TEM), photoluminescence (PL), electroluminescence (EL) emissions and standard CIE 1931 chromaticity diagrams have been used to characterize the samples. The highest WLEDs emission was achieved for the annealed YAG:Ce3+, together with proper color rendering index (CRI), and tunable correlated color temperature (CCT). Finally, we conclude that the decreasing EL intensity at increased injection current is caused by the thermal ionization from the 5d1 level to the conduction band.</description><subject>Aluminum</subject><subject>Annealing</subject><subject>Cerium</subject><subject>Chromaticity</subject><subject>Color temperature</subject><subject>Combustion</subject><subject>Conduction bands</subject><subject>Electroluminescence</subject><subject>Emission analysis</subject><subject>Indium gallium nitrides</subject><subject>Injection current</subject><subject>Light emission</subject><subject>Light emitting diodes</subject><subject>Phosphors</subject><subject>Photoluminescence</subject><subject>Thermogravimetry</subject><subject>White light</subject><subject>X ray powder diffraction</subject><subject>Yttrium</subject><subject>Yttrium-aluminum garnet</subject><issn>1012-0394</issn><issn>1662-9779</issn><issn>1662-9779</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqNkE1r3DAQhk1ooGnS_yAIOdoZ-UOSD6UEd5sENmRhW0pPwvqqtWQtV5Jr9tpfXi0byLWneYd5Z97hybIbDEUNJbtdlqUI0uoxWmNlMep4u91uigpwQeAsu8CElHlLafsuacBlDlVbv88-hLADqDDD7CL7u42zOiBnUBw0WhmjZTx2j-MuKetG1M3ep4iAkv4x2KjR2v4aIlrtbQhHQ3J3Ov_iJq3Qz7t7tBlcmAbn0cYtSqfi9dT7NBQH9GSld0v_R6PO7cUcjglX2bnpX4L--Fovs-9fV9-6h3z9fP_Y3a1zWZUV5FIrg2tBGknbsmSK0gaY0b0AkKaCilIlSC9LhVvWKCUpq5mqCWmIEECFqC6z69Pdybvfsw6R79zsxxTJyxqAtS3GTXJ9OrnSoyF4bfjk7b73B46BH7HzhJ2_YecJO0_YecLOCaT9z6f96PsxRC2Ht5j_u_APlsWVDQ</recordid><startdate>20200301</startdate><enddate>20200301</enddate><creator>Omar, A.F.</creator><creator>Ahmed, Naser Mahmoud</creator><creator>Abd, Husnen R.</creator><creator>Lau, Khai Shenn</creator><creator>Hassan, Zainuriah</creator><creator>Alsultany, Forat Hamzah</creator><general>Trans Tech Publications Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>P5Z</scope><scope>P62</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20200301</creationdate><title>Study of the Effect of Injection Currents on White Light Emission of Ce-Doped YAG Phosphor Powder Prepared by Microwave Combustion</title><author>Omar, A.F. ; 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Here, the YAG:Ce3+ nanopowders have been synthesized using microwave combustion (MW) according to the formula, Y(3-0.04) Al5O12: 0.04Ce3+ to produce white light emitting diode (WLEDs) by conversion from blue indium gallium nitride light emitting diode (InGaN LED, 445 nm) chips; the whole process took only 20 min. Pure YAG phase was obtained after annealing at 1050 °C for 5 h with nonaggregated and spherical particles. Thermogravimetry and derivative thermogravimetry (TG/DTG), X-ray powder diffraction (XRPD), transmission electron microscope (TEM), photoluminescence (PL), electroluminescence (EL) emissions and standard CIE 1931 chromaticity diagrams have been used to characterize the samples. The highest WLEDs emission was achieved for the annealed YAG:Ce3+, together with proper color rendering index (CRI), and tunable correlated color temperature (CCT). Finally, we conclude that the decreasing EL intensity at increased injection current is caused by the thermal ionization from the 5d1 level to the conduction band.</abstract><cop>Zurich</cop><pub>Trans Tech Publications Ltd</pub><doi>10.4028/www.scientific.net/SSP.301.60</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Aluminum Annealing Cerium Chromaticity Color temperature Combustion Conduction bands Electroluminescence Emission analysis Indium gallium nitrides Injection current Light emission Light emitting diodes Phosphors Photoluminescence Thermogravimetry White light X ray powder diffraction Yttrium Yttrium-aluminum garnet |
| title | Study of the Effect of Injection Currents on White Light Emission of Ce-Doped YAG Phosphor Powder Prepared by Microwave Combustion |
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