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Influences of dopant concentration in sol-gel derived AZO layer on the performance of P3HT:PCBM based inverted solar cell
Aprilia A.a,b, Wulandari P.a, Suendo V.a, Hermana, Hidayat R.a, Fujii A.c, Ozaki M.c
a Physics of Magnetism and Photonics Research Division, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Indonesia
b Materials Physics Research Division, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Indonesia
c Department of Electrical, Electronics and Information Engineering, Faculty of Engineering, Osaka University, Japan
[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]Organic solar cells based on P3HT:PCBM bulk heterojunction with an inverted structure have been fabricated using aluminum doped ZnO (AZO) as their electron transport layer, which was prepared by sol-gel route with 2-methoxyethanol as the solvent. The influences of Al concentration on the surface morphology and electrical properties of AZO layer were investigated by atomic force microscopy, X-ray diffraction and Hall effect measurements. The experimental results indicate that Al concentration has major influence on the grain size and only minor influence on crystallite size, leading to different surface morphology for different doping concentrations. Doping at high concentration produces higher charge carrier density, but not for charge carrier mobility and its electrical conductivity, which may be also influenced by the surface morphology. The effects of Al concentration in AZO layer were also observed in the J-V (current density-voltage) and small AC impedance characteristics of the fabricated solar cells. The resistance increases with Al concentration, but the capacitance decreases. The solar cell using AZO layer with doping concentration of 0.5 wt% shows the smallest impedance and the best J-V characteristics with the highest conversion efficiency. These characteristics seem to be correlated with the properties of AZO layer and its interface with the active layer. © 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]2-Methoxyethanol,AC-impedance,Active Layer,Al-concentration,Al-doped ZnO,Aluminum-doped ZnO,Bulk heterojunction,Dopant concentrations,Doping concentration,Electrical conductivity,Electron transport layers,Grain size,Hall effect measurement,High concentration,Inverted structure,J-V characteristics,Organic solar cell,Resistance increase,Sol-gel routes[/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]Al doped ZnO (AZO),Inverted solar cell,Organic solar cell,Small AC impedance[/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 would like to thank for the support from Program Riset dan Inovasi ITB 2011 No. 231/I1.C01/PL/2011. AA would like to acknowledge for the short-term research visit support from DIKTI No. 1693/D4.4/2010. RH would also like to acknowledge the International Staff Exchange program from I-MHERE (Batch II/ 2012) – ITB.[/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.solmat.2012.12.033[/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]