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Direct synthesis of spherical YAG:Ce phosphor from precursor solution containing polymer and urea
Ogi T.a, Nandiyanto A.B.D.a, Wang W.-N.b, Iskandar F.c, Okuyama K.a
a Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Japan
b Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, United States
c Department of Physics, Institute Technology Bandung, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]In this study, spherical cerium-doped yttrium aluminum garnet (YAG:Ce) phosphor particles were directly synthesized by a modified sol-gel method using poly(ethylene glycol) (PEG) and urea. In the absence of PEG and urea, only irregularly shaped particles were obtained through aggregation and sintering after solvent evaporation. In contrast, adding both PEG and urea to the precursor solution resulted in the formation of spherical particles. The spherical morphology was attributed to micellization by PEG and micelle agglomeration by urea in a liquid phase. Scanning electron microscopy and X-ray diffraction analyses revealed that the spherical particles were of size around 5. μm, and the obtained crystal was pure a YAG phase. The emission band of the YAG:Ce phosphor prepared at 1600. °C for 2. h was observed at 530. nm under excitation at 470. nm, and the maximum internal quantum efficiency was found to be 57.6%. © 2012 Elsevier B.V..[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Cerium-doped,Direct synthesis,Emission bands,Internal quantum efficiency,Liquid Phase,Modified sol-gel method,Phosphor particles,Precursor solutions,Shaped particles,Solvent evaporation,Spherical morphologies,Spherical particle,YAG,Yttrium aluminum garnet[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Micelle,Phosphor,Photoluminescence,Sol-gel,Spherical particle,Yttrium aluminum garnet[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]The authors want to thank Akihiro Kinoshita, Kousuke Okino for assistance in the experiments and powder characterization. This research was supported by a Grant-in-Aid for Young Scientists (B) (No. 23760729 ) and Grant-in-Aid for Scientific Research (A) (No. 22246099 ) sponsored by the Ministry of Education, Culture, Sports, Science and Technology of Japan.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.cej.2012.09.033[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]