Theoretical optimization of defect density and band offsets for CsPbI2Br based perovskite solar cells

Tara, Ayush; Bharti, Vishal; Sharma, Susheel; Gupta, Rockey

doi:10.1016/j.mtcomm.2022.104546

Cited by 8 publications

(5 citation statements)

References 47 publications

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“…In addition, annealing resulted in enhanced hole injection into the hole–acceptor. Both these factors lead to a V oc of over 1.30 V. Apart from experimental studies, simulations of the standalone CsPbI 2 Br solar cell, using SCAPS‐1D, have also reported V oc as high as 1.5579 V. [ 56 ]…”

Section: Resultsmentioning

confidence: 99%

“…In addition, annealing resulted in enhanced hole injection into the hole-acceptor. Both these factors lead to a V oc of over 1.30 V. Apart from experimental studies, simulations of the standalone CsPbI 2 Br solar cell, using SCAPS-1D, have also reported V oc as high as 1.5579 V. [56] The standalone bottom subcell shows a PCE of 19.45%, with FF of 0.757, J sc of 35.76 mA cm À2 , and a V oc of 0.718 V. The higher V oc for the top subcell is due to the wider bandgap (1.82 eV) of CsPbI 2 Br absorber material compared to the relatively smaller bandgap (1.12 eV) of c-Si in the bottom subcell. The bottom c-Si absorbs low-energy photons and yields higher J sc .…”

Section: Calibration Of the Standalone Top And Bottom Subcellsmentioning

confidence: 98%

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Over 32% Efficient All‐Inorganic Two‐Terminal CsPbI₂Br/Si Tandem Solar Cells: A Numerical Investigation

Hossain

2023

Energy Tech

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Cesium‐based all‐inorganic CsPbI2Br perovskite solar cells (PSCs) offer excellent thermal stability and an optimum bandgap for photovoltaic applications, making them promising alternatives to the thermally unstable organic–inorganic metal halide perovskites. State‐of‐the‐art single‐junction CsPbI2Br PSCs are yet to achieve high power conversion efficiency (PCE) of organic–inorganic hybrid counterparts. Herein, numerical simulations, through solar cell capacitance simulator‐1D (SCAPS‐1D), to demonstrate a highly efficient two‐terminal tandem solar cell (TSC), with CsPbI2Br and a silicon heterojunction (a‐Si:H/c‐Si) as the top and bottom subcells, respectively, are used. The standalone subcells are first calibrated to match the experimental results reported in literature, followed by the evaluation of the tandem configuration. With 0.5 μm‐thick CsPbI2Br top cell, the bottom c‐Si thickness is adjusted to match the top and bottom subcell currents, boosting the PCE to 26.25%. The PCE of the TSC can be further improved, by carefully selecting the electron and hole transport layers for the top PSC and by tuning the work function of the front‐contact electrode. Under optimized and current‐matched conditions, the proposed tandem design shows a conversion efficiency as high as 32.44%, enabling the pathway for highly efficient all‐inorganic perovskite/silicon tandems.

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Section: Resultsmentioning

confidence: 99%

Section: Calibration Of the Standalone Top And Bottom Subcellsmentioning

confidence: 98%

Over 32% Efficient All‐Inorganic Two‐Terminal CsPbI₂Br/Si Tandem Solar Cells: A Numerical Investigation

Hossain

2023

Energy Tech

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“…115 Furthermore, the inorganic CsPbI 2 Br PSCs lifetime is still far behind mature photovoltaic technologies with a lifetime of >20 years. 116 To promote the development of highly efficient and stable CsPbI 2 Br PSCs with PCE >20% in the future, 117 some suggestions are proposed and listed below:…”

Section: Conclusion and Future Outlookmentioning

confidence: 99%

“…115 Furthermore, the inorganic CsPbI 2 Br PSCs lifetime is still far behind mature photovoltaic technologies with a lifetime of 420 years. 116 To promote the development of highly efficient and stable CsPbI 2 Br PSCs with PCE 420% in the future, 117 some suggestions are proposed and listed below: (i) Optimization of CsPbI 2 Br films. As the core part of PSCs, high-quality CsPbI 2 Br films are important to improve the charge carrier diffusion length of the perovskite over 1 mm by Energy & Environmental Science Review minimizing the electronic trap state density of the perovskite film.…”

Section: Conclusion and Future Outlookmentioning

confidence: 99%

Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations

Lim

Yang

Wei

2023

Energy Environ. Sci.

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“…From the band diagram shown in figure 6(a), the CBO of the perovskite/ETL interface is 0.26 eV, when we used the χ value of 4.16 eV of the perovskite material for the device structure, glass/Ag/Cu 2 O/CsPbI 2 Br/PCBM/SnO 2 /ITO. The positive value of the CBO is the main reason for creating a barrier in the perovskite/ETL interface, which will restrict the electron flow (graphically shown in the corresponding graph), this type of CBO is called as spike-type [19].…”

Section: Effect Of Cbomentioning

confidence: 99%

Structural optimization of inverted CsPbI₂Br perovskite solar cells for enhanced performance via SCAPS-1D simulation

Das¹,

Rana

Guchhait³

2023

Phys. Scr.

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The CsPbI2Br material benefits perovskite solar cells (PSCs) by balancing their efficiency with chemical and thermal stability. Herein, we performed numerical modeling of a p-i-n structured PSCs employing different electron transport layers (ETLs). In order to optimize the ETL, the simulation results showed bilayer ETL (PCBM/SnO2) yielded the best device performance. Then, by tweaking the absorber layer's defect density, thickness, electron affinity, and band gap, we optimized the device performance utilizing this bilayer ETL and yielded power conversion efficiency (PCE) of 12.51%, fill factor (FF) of 73.60%, open circuit voltage (VOC) of 0.94 V, and short circuit current density (JSC) of 17.94 mA/cm2. These CsPbI2Br perovskite-based devices would have outstanding thermal stability in a range from 253K to 323K. Another important observation in these PSCs is that interfacial defect density plays a crucial for regulating the VOC. We, therefore, anticipate that this research will aid in the development of extremely effective and stable inverted all inorganic PSCs.

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Theoretical optimization of defect density and band offsets for CsPbI2Br based perovskite solar cells

Cited by 8 publications

References 47 publications

Over 32% Efficient All‐Inorganic Two‐Terminal CsPbI₂Br/Si Tandem Solar Cells: A Numerical Investigation

Over 32% Efficient All‐Inorganic Two‐Terminal CsPbI₂Br/Si Tandem Solar Cells: A Numerical Investigation

Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations

Structural optimization of inverted CsPbI₂Br perovskite solar cells for enhanced performance via SCAPS-1D simulation

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Theoretical optimization of defect density and band offsets for CsPbI2Br based perovskite solar cells

Cited by 8 publications

References 47 publications

Over 32% Efficient All‐Inorganic Two‐Terminal CsPbI2Br/Si Tandem Solar Cells: A Numerical Investigation

Over 32% Efficient All‐Inorganic Two‐Terminal CsPbI2Br/Si Tandem Solar Cells: A Numerical Investigation

Inorganic CsPbI2Br halide perovskites: from fundamentals to solar cell optimizations

Structural optimization of inverted CsPbI2Br perovskite solar cells for enhanced performance via SCAPS-1D simulation

Contact Info

Product

Resources

About

Over 32% Efficient All‐Inorganic Two‐Terminal CsPbI₂Br/Si Tandem Solar Cells: A Numerical Investigation

Over 32% Efficient All‐Inorganic Two‐Terminal CsPbI₂Br/Si Tandem Solar Cells: A Numerical Investigation

Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations

Structural optimization of inverted CsPbI₂Br perovskite solar cells for enhanced performance via SCAPS-1D simulation