[1] [1] QIU X, JIANG Y, ZHANG H, et al. Lead-free mesoscopic Cs2SnI6 perovskite solar cells using different nanostructured ZnO nanorods as electron transport layers[J]. Physica status solidi (RRL)-rapid research letters, 2016, 10(8): 587-591.

[2] [2] WANG A, YAN X, ZHANG M, et al. Controlled synthesis of lead-free and stable perovskite derivative Cs2SnI6 nanocrystals via a facile hot-injection process[J]. Chemistry of materials, 2016, 28(22): 8132-8140.

[3] [3] LPEZ-FRAGUAS E, MASI S, MORA-SERO I. Optical characterization of lead-free Cs2SnI6 double perovskite fabricated from degraded and reconstructed CsSnI3 films[J]. ACS applied energy materials, 2019, 2(12): 8381-8387.

[4] [4] ULLAH S, ULLAH S, WANG J, et al. Investigation of air-stable Cs2SnI6 films prepared by the modified two-step process for lead-free perovskite solar cells[J]. Semiconductor science and technology, 2020, 35(12): 125027.

[5] [5] RASUKKANNU M, VELAUTHAPILLAI D, VAJEESTON P. A first-principle study of the electronic, mechanical and optical properties of inorganic perovskite Cs2SnI6 for intermediate-band solar cells[J]. Materials letters, 2018, 218: 233-236.

[6] [6] MOZAFFARI S, NATEGHI M R. A novel perovskite solar cell comprising CsPbI2Br/Cs2SnI6 (CsGeI3) cascade absorbing bilayer and Cr2O3 electron transport material: a theoretical comparison study[J]. Optik, 2023, 288: 171206.

[7] [7] ISLAM M A, JAHAN N A, HOSSAIN M M. A lead-free all-inorganic Cs2SnI6 based ultra-thin perovskite solar cell optimized using SCAPS-1D simulator[C]//2022 International Conference and Utility Exhibition on Energy, Environment and Climate Change (ICUE). New York: IEEE, 2022: 1-10.

[8] [8] CHABRI I, BENHOURIA Y, OUBELKACEM A, et al. Numerical analysis of lead-free Cs2SnI6-based perovskite solar cell, with inorganic charge transport layers using SCAPS-1D[J]. Journal of electronic materials, 2023, 52(4): 2722-2736.

[9] [9] QIU X, CAO B, YUAN S, et al. From unstable CsSnI3 to air-stable Cs2SnI6: a lead-free perovskite solar cell light absorber with bandgap of 1.48 eV and high absorption coefficient[J]. Solar energy materials and solar cells, 2017, 159: 227-234.

[10] [10] BIMLI S, MANJUNATH V, MULANI S R, et al. Theoretical investigations of all inorganic Cs2SnI6 double perovskite solar cells for efficiency~30%[J]. Solar energy, 2023, 256: 76-87.

[11] [11] THOMAS T. Simulation study of Cs2TiBr6 perovskite solar cells using graphene oxide as a novel HTL layer using SCAPS 1-D[J]. Renewable energy research and applications, 2023, 4(2): 159-169.

[12] [12] SHARMA N, NEGI C M, SHARMA M, et al. A comparative analysis of the optoelectronic performance of conventional and inverted design organic photodetectors[J]. Optical materials, 2019, 95: 109273.

[13] [13] SHARMA M, ALVI P A, GUPTA S K, et al. The optoelectronic behavior of reduce graphene oxide-carbon nanotube nanocomposites[J]. Synthetic metals, 2021, 281: 116892.

[14] [14] XIE S, LIU J, ZHANG F. An accurate circuit model for the statistical behavior of InP/InGaAs SPAD[J]. Electronics, 2020, 9(12): 2059.

[15] [15] PATEL P K. Device simulation of highly efficient eco-friendly CH3NH3SnI3 perovskite solar cell[J]. Scientific reports, 2021, 11(1): 3082.

[16] [16] MOTTAKIN M, SOBAYEL K, SARKAR D, et al. Design and modelling of eco-friendly CH3NH3SnI3-based perovskite solar cells with suitable transport layers[J]. Energies, 2021, 14(21): 7200.

[17] [17] HOSSAIN M I, ALHARBI F H, TABET N. Copper oxide as inorganic hole transport material for lead halide perovskite based solar cells[J]. Solar energy, 2015, 120: 370-380.

[18] [18] CHAUHAN A, OUDHIA A, SHRIVASTAV A K. Analysis of eco-friendly tin-halide Cs2SnI6-based perovskite solar cell with all-inorganic charge selective layers[J]. Journal of materials science: materials in electronics, 2022, 33(3): 1670-1685.

[19] [19] WIDIANTO E, ROSA E S, TRIYANA K, et al. Performance analysis of carbon-based perovskite solar cells by graphene oxide as hole transport layer: experimental and numerical simulation[J]. Optical materials, 2021, 121: 111584.

[20] [20] GHOLIPOOR M, SOLHTALAB N, MOHAMMADI M H. High-performance parallel tandem MoTe2/perovskite solar cell based on reduced graphene oxide as hole transport layer[J]. Scientific reports, 2022, 12(1): 20455.

[21] [21] PAL D. A comprehensive analysis of eco-friendly Cs2SnI6 based tin halide perovskite solar cell through device modeling[J]. Advanced theory and simulations, 2023, 6(3): 2200856.

[22] [22] BARTESAGHI D, PREZ I D, KNIEPERT J, et al. Competition between recombination and extraction of free charges determines the fill factor of organic solar cells[J]. Nature communications, 2015, 6(1): 7083.

[23] [23] BARTELT J A, LAM D, BURKE T M, et al. Charge-carrier mobility requirements for bulk heterojunction solar cells with high fill factor and external quantum efficiency >90%[J]. Advanced energy materials, 2015, 5(15): 1500577.

[24] [24] GALATOPOULOS F, SAVVA A, PAPADAS I T, et al. The effect of hole transporting layer in charge accumulation properties of pin perovskite solar cells[J]. APL materials, 2017, 5(7).

[25] [25] JOKAR E, HUANG Z Y, NARRA S, et al. Anomalous charge-extraction behavior for graphene-oxide (GO) and reduced graphene-oxide (rGO) films as efficient p-contact layers for high-performance perovskite solar cells[J]. Advanced energy materials, 2018, 8(3): 1701640.

[26] [26] KANG A K, ZANDI M H, GORJI N E. Fabrication and degradation analysis of perovskite solar cells with graphene reduced oxide as hole transporting layer[J]. Journal of electronic materials, 2020, 49: 2289-2295.

[27] [27] TOUAFEK N, MAHAMDI R, DRIDI C. Boosting the performance of planar inverted perovskite solar cells employing graphene oxide as HTL[J]. Digest journal of nanomaterials and biostructures, 2021, 16(2): 705-712.

[28] [28] KANG A K, ZANDI M H, GORJI N E. Simulation analysis of graphene contacted perovskite solar cells using SCAPS-1D[J]. Optical and quantum electronics, 2019, 51: 1-9.