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Oxygen vacancy enhancement promoting strong green emission through surface modification in ZnO thin film
Purbayanto M.A.K.a, Nurfani E.a, Chichvarina O.b, Ding J.b, Rusydi A.b, Darma Y.a
a Department of Physics, Institut Teknologi Bandung, Bandung, 40132, Indonesia
b Department of Material Science and Engineering, National University of Singapore, Singapore, 117574, Singapore
[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]© 2018 Elsevier B.V. We study the effect of oxygen vacancy enhancement in ZnO thin films through the surface modification using H 2 annealing. After H 2 annealing, low-temperature PL spectra show the strong emission at 2.5 eV and still observable at room temperature, in the same time PL spectra confirm the H 2 does not act as the impurity in our system. The Raman spectra show the dominance of oxygen vacancy as indicated by the emergence of A 1 (LO) mode. Moreover, X-ray photoelectron spectroscopy reveals that the number of oxygen vacancy on the surface is increased after the H 2 annealing. We found the strong relationship between oxygen vacancy and surface modification promoting strong green emission. Here, we propose the role of H 2 annealing in the surface modification leading to the formation of multiple-stacked porous ZnO film. This study also brings us to describe the electronic and optical transition mechanism. Our result is essential to improve the functionality of ZnO by surface modification for light-emitting device applications.[/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]Effect of oxygen,Green emissions,Light emitting devices,Low temperatures,Multiple-stacked porous,Transition mechanism,Vacancy enhancement,ZnO thin film[/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]H 2 Annealing,Multiple-stacked porous,Oxygen vacancy,Pulsed-laser deposition,ZnO[/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]This work was partly supported by Ministry of Research, Technology, and Higher Education of Republic of Indonesia through Penelitian Dasar Unggulan Perguruan Tinggi (PDUPT) program 2018 ( 532w/l1.C01/PL/2018 ), Hibah Kompetensi Kemenristekdikti 2018 , P3MI research program 2018 ( 1275G/l1.C01/PL/2018 ), and Riset KK ITB 2018 ( 324f/l1.C01/PL/2018 ).[/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.apsusc.2018.08.170[/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]