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Ab-initio calculation of APbI3 (A=Li, Na, K, Rb and Cs) perovskite crystal and their lattice constants optimization using density functional theory
Pitriana P.a,b, Wungu T.D.K.a, Hidayat R.a, Herman H.a
a Physics of Photonics and Magnetism Research Division, Physics Program Study, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Bandung, 40132, Indonesia
b Physics Education Program Study, Faculty of Tarbiyah and Teacher Training, UIN Sunan Gunung Djati, 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]© 2019 Published under licence by IOP Publishing Ltd.Halide perovskite materials APbI3 (with A is inorganic alkaline cation) have received many attentions in some recent years related to the rapid progress of perovskite solar cells. Particularly, CsPbI3 perovskite has been much investigated due to relatively more stable in comparison to other inorganic cation while its energy conversion efficiency has reached 10.5%. In this study, we report our calculation results of the geometric structure and the electronic structure of these inorganic perovskites with various alkaline cation. The calculations were performed by employing the Density Functional Theory (DFT) method using Quantum Espresso computational software package. The calculation employed variable-cell relaxation algorithm (vc-relax) to obtain the lowest total energy value and the corresponding Density of States (DOS). In addition, Ultrasoft pseudopotentials and PBE exchange-correlation functions were used. The cut-off of kinetic energy was set at 40 Rydberg and the k-point was set at 5x5x5. The computation results lead to the energy gap range in 1.40 eV to 1.46 eV. In addition, there is also an agreement between the electronic band structures and the DOS distribution pattern for optimum lattice constant.[/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]Ab initio calculations,Computational software,Density functional theory methods,Distribution patterns,Electronic band structure,Exchange-correlation functions,Relaxation algorithm,Ultrasoft pseudo potential[/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][/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][/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/10.1088/1742-6596/1170/1/012023[/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]