Effect of defect density and energy level mismatch on the performance of perovskite solar cells by numerical simulation

Jamal, Mohammad Shah; Shahahmadi, Seyed Ahmad; Wadi, Mohd. Aizat Abdul; Chelvanathan, Puvaneswaran; Asim, Nilofar; Misran, Halina; Hossain, Mohammad Ismail; Amin, Nowshad; Sopian, Kamaruzzaman; Akhtaruzzaman, Md.

doi:10.1016/j.ijleo.2018.12.163

Cited by 93 publications

(42 citation statements)

References 38 publications

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“…Thus, the device PCEs continuously increase below 1.4%, which should be mainly contributed by the J sc and FF. Generally, J sc is subjected two key processes: generation and collection of photo-generated charge carriers. ,, As shown in Figures e and S12, the optical absorption of the perovskite layer is significantly increased after adding MXene due to the modified film quality of perovskite, which means that the absorber layer deposited on the MXene/SnO 2 hybrid ETL can generate more charge carriers under illumination. In addition, these photo-excited electrons and holes are subsequently transferred in opposite directions before being collected by the respective electrodes, during which nonradiative recombination prefers to happen in the traps and defects such as vacancies, interstitials, impurities, and dangling bonds at GBs and interfaces.…”

Section: Resultsmentioning

confidence: 99%

Controlling the Defect Density of Perovskite Films by MXene/SnO₂ Hybrid Electron Transport Layers for Efficient and Stable Photovoltaics

et al. 2021

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The defect control of polycrystalline perovskite films is essential for achieving an efficient and stable perovskite solar cell (PSC). However, existing methods of reducing defects suffer from their complex processes, low durability, and limited effects by using molecular materials in terms of passivation mechanisms. Herein, a hybrid film composed of SnO 2 nanoparticles/Ti 3 C 2 T x MXene nanoflakes is used as the electron transport layer (ETL) in a planar regular-structure PSC. The results indicate that by changing the Ti 3 C 2 T x /SnO 2 ratios (0−2.2 wt %) in ETLs, the film qualities of top perovskite layers are controllable, including the compactness, crystal size, surface roughness, crystallinity, optical absorption, defect density, and so forth. The defect density in perovskite films is substantially reduced from 5.65 × 10 15 to 2.25 × 10 15 cm −3 using an optimized hybrid ETL (1.4 wt %) compared with the pristine SnO 2 , while the electrical conductivity of the hybrid ETL is decreased probably due to the geometric factor of the incorporated MXene. As a result, the power conversion efficiency of PSCs is significantly increased from 16.28 to 20.35%, and the environmental stability of the unencapsulated devices is greatly improved. This work provides a facile, robust, and effective way to reduce defects in perovskite films by using emerging MXene nanomaterials and might also be useful to other perovskite-based (opto)electronic devices such as light-emitting diodes and photodetectors.

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Section: Resultsmentioning

confidence: 99%

Controlling the Defect Density of Perovskite Films by MXene/SnO₂ Hybrid Electron Transport Layers for Efficient and Stable Photovoltaics

et al. 2021

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“…Electrical properties were measured using Lakeshore 8400 Hall Effect Measurement System. The numerical analysis has been carried out using 1D-solar cell capacitance simulator (SCAPS-1D) software [39,40,41]. The analysis was carried out using material optical properties as measured through experiments (bandgap, absorption coefficient, carrier mobility, carrier concentration) of the samples prepared in this work while other parameters like electron affinity, density of states, dielectric permittivity and thermal velocity were extracted from relevant literature [15,17].…”

Section: Experimental Setup and Methodologymentioning

confidence: 99%

E-beam evaporated hydrophobic metal oxide thin films as carrier transport materials for large scale perovskite solar cells

Hossain

Zakaria

Zikri

et al. 2020

Materials Technology

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“…(Shikoh et al 2020;Bruzzi et al 2020;Nithya and Sudheer 2020). After optimizing, we achieved the optimum values of , and , (Jamal et al 2019;Rai et al 2020;Teimouri et al 2020). Finally, here we report the highest PCE.…”

Section: Effect Of Doping Concentration (Nd) Of Sno2mentioning

confidence: 96%

Numerical simulation of inorganic Cs2AgBiBr6 as a lead-free perovskite using device simulation SCAPS-1D

2021

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Double perovskite, Cs 2 AgBiBr 6 , is introduced as a lead-free perovskite solar cell. Device modeling of Cs 2 AgBiBr 6 (DP) was accomplished to obtain the optimum parameters using the Solar Cell Capacitance Simulator (SCAPS). Two devices with two different hole transport layers (HTLs) were investigated, including P 3 HT and Cu 2 O. For both devices with different HTLs, an optimal thicknesses of 1200 nm and defect densities of 1.0 ×10 14 cm -3 for DP layer were attained. For both HTLs, conduction band offset, CBO, is -0.21 eV and valence band offset, VBO, is +0.16 eV. For shallow acceptor doping concentration of P 3 HT and Cu 2 O, the values of 5.0 × 10 19 and 5.0 × 10 17 cm −3 were obtained, respectively. As far as the shallow donor density of electron transport layers (ETLs) is concerned, for both cases, the optimum value of 5.0 × 10 19 cm -3 were achieved. For capture cross section, , , in absorber layer for both HTLs, the optimal value at , of 10 −20 cm 2 for , (defect density of DP) is 10 16 cm −3 , at , of 10 −19 cm 2 for , is 10 15 cm −3 , at , of 10 −18 cm 2 for , is 10 14 cm −3 , at , of 10 −17 cm 2 for , is 10 13 cm −3 , and at , of 10 −16 cm 2 for , is 10 12 cm −3 . For P 3 HT device, the interface defect density of P 3 HT/Cs 2 AgBiBr 6 is occurred at 1.0×10 14 cm -2 , and for Cs 2 AgBiBr 6 /SnO 2 is happened at 1.0×10 9 cm -2 . For Cu 2 O device, the interface defect density of Cu 2 O/ Cs 2 AgBiBr 6 is befallen at 1.0×10 13 cm -2 , and for Cs 2 AgBiBr 6 /SnO 2 is happened at 1.0×10 10 cm -2 . As for radiative recombination, for P 3 HT device, the optimal value is happened at 2.3×10 -13 cm 3 /s, however, for Cu 2 O device is occurred at 2.3×10 -12 cm 3 /s. Finally, for P 3 HT device, a maximum power conversion efficiency, PCE, of 11.69% (open-circuit voltage, V oc , of 2.02 V, short-circuit current density, J sc , of 6.39 mA/cm 2 , and fill-factor, FF, of 0.90 (90% )) were achieved, and for Cu 2 O device, a PCE of 11.32% (V oc of 1.97 V, J sc of 6.39 mA/cm 2 , and FF of 0.895 (89.5% )) were attained. This is the highest efficiency for Cs 2 AgBiBr 6 double perovskite solar cell which was achieved till now. Finally, our results are providing towards fabricating a lead-free and inorganic solar cell.Keywords Cs 2 AgBiBr 6 . Double perovskite solar cell. Lead-free perovskite. Conduction band offset (CBO). Valence band offset (VBO). SCAPS

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Effect of defect density and energy level mismatch on the performance of perovskite solar cells by numerical simulation

Cited by 93 publications

References 38 publications

Controlling the Defect Density of Perovskite Films by MXene/SnO₂ Hybrid Electron Transport Layers for Efficient and Stable Photovoltaics

Controlling the Defect Density of Perovskite Films by MXene/SnO₂ Hybrid Electron Transport Layers for Efficient and Stable Photovoltaics

E-beam evaporated hydrophobic metal oxide thin films as carrier transport materials for large scale perovskite solar cells

Numerical simulation of inorganic Cs2AgBiBr6 as a lead-free perovskite using device simulation SCAPS-1D

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Effect of defect density and energy level mismatch on the performance of perovskite solar cells by numerical simulation

Cited by 93 publications

References 38 publications

Controlling the Defect Density of Perovskite Films by MXene/SnO2 Hybrid Electron Transport Layers for Efficient and Stable Photovoltaics

Controlling the Defect Density of Perovskite Films by MXene/SnO2 Hybrid Electron Transport Layers for Efficient and Stable Photovoltaics

E-beam evaporated hydrophobic metal oxide thin films as carrier transport materials for large scale perovskite solar cells

Numerical simulation of inorganic Cs2AgBiBr6 as a lead-free perovskite using device simulation SCAPS-1D

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Controlling the Defect Density of Perovskite Films by MXene/SnO₂ Hybrid Electron Transport Layers for Efficient and Stable Photovoltaics

Controlling the Defect Density of Perovskite Films by MXene/SnO₂ Hybrid Electron Transport Layers for Efficient and Stable Photovoltaics