Study the effect of band offsets on the performance of lead-free double perovskite solar cell

Singh, Neelima; Agarwal, Alpana; Agarwal, M. K.

doi:10.1016/j.optmat.2022.112112

Cited by 17 publications

(5 citation statements)

References 37 publications

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“…For instance, the optimum thickness for Cs 2 AgBi 0.75 Sb 0.25 Br 6 should be 400 nm, which is significantly higher than the theoretical value for the pristine film (200 nm). Similar thickness was reported by Singh et al [ 182 ] Improving the film quality also limits the imperfections and carrier traps at the interface. Tauc plots have shown that Cs 2 AgBiBr 6 film may have an indirect bandgap of ≈ 2.03 eV with a CBM of −4.12 eV and a VBM of −6.15 eV.…”

Section: Photophysics Of Cs2agbibr6 and Contact Characteristicssupporting

confidence: 80%

“…Theoretical studies show that Cu 2 O and CuSCN HTLs and ZnOS ETL well meet these requirements. [181,182] The performance of these charge transport layers can be further enhanced by taking other optimization measures on the absorber layer. For instance, the optimum thickness for Cs 2 AgBi 0.75 Sb 0.25 Br 6 should be 400 nm, which is significantly higher than the theoretical value for the pristine film (200 nm).…”

Section: Contact Characteristicsmentioning

confidence: 99%

“…Theoretical studies show that Cu 2 O and CuSCN HTLs and ZnOS ETL well meet these requirements. [ 181,182 ]…”

Section: Photophysics Of Cs2agbibr6 and Contact Characteristicsmentioning

confidence: 99%

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Stacking Interactions and Photovoltaic Performance of Cs₂AgBiBr₆ Perovskite

Igbari

Shao

et al. 2023

Solar RRL

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Elpasolite Cs2AgBiBr6 also known as double perovskite has been touted in recent years as a promising alternative to the lead‐based perovskite for light harvesting. Its structure and properties mainly stem from the replacement of Pb2+ cation with a pair of aliovalent silver (Ag+) and bismuth (Bi3+) cations. Although the elpasolite Cs2AgBiBr6 exhibits improved stability, its photophysical properties and device performance are inferior to those of the Pb‐based perovskites. To date, numerous efforts have been geared toward the development of efficient Cs2AgBiBr6 solar cells. However, the indirect, wide bandgap and high exciton binding energy of Cs2AgBiBr6 have limited such efforts. This has been attributed to its low (zero) electronic dimensionality (0D), formation of small polaronic states, and interfacial imperfections with charge transporting layers. In this review, the different aspects of the elpasolite Cs2AgBiBr6 in relation to compositional and interlayer interactions in solar cell are discussed, and its suitability for photovoltaic application is assessed, accompanied by potential measures to further advance its performance. An alternate application of Cs2AgBiBr6 in photocatalysis, which takes advantage of its less toxicity and better stability, is also discussed.

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Section: Photophysics Of Cs2agbibr6 and Contact Characteristicssupporting

confidence: 80%

Section: Contact Characteristicsmentioning

confidence: 99%

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Stacking Interactions and Photovoltaic Performance of Cs₂AgBiBr₆ Perovskite

Igbari

Shao

et al. 2023

Solar RRL

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“…That's why in that device, the performance is relatively low. But when we used the χ value of 3.67 eV (corresponding to the best result), the CBO became −0.23 eV, shown in figure 6(b), and this negative CBO is called as cliff-type [35]. In the cliff-type CBO, there is no barrier in the interface of perovskite/ETL, and the charge collection is easier.…”

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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“…Furthermore, the FF and PCE show an increasing trend, as demonstrated in figure 8. The acceptor density in the absorber layer has been optimized to reach 5 × 10 18 cm −3 , as increasing it further would continuously escalate costs and, beyond 1 × 10 19 cm −3 , lead to the emergence of large conduction band offsets (CBO) and valence band offsets (VBO) [57,58]. Therefore, an acceptor density of 5 × 10 18 cm −3 in the absorber layer strikes a balance between maximizing the photovoltaic performance and minimizing the associated costs, while avoiding adverse effects due to large CBO and VBO.…”

Section: Effect Of Absorber's Acceptor Density Variationmentioning

confidence: 99%

Design of a low-cost, environment friendly perovskite solar cell with synergic effect of graphene oxide-based HTL and CH₃NH₃GeI₃ as ETL

Chaudhary,

Verma,

Chauhan

2023

Eng. Res. Express

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This research explores a novel, environment friendly perovskite solar cell (PSC) featuring a lead-free CH3NH3SnI3 absorber layer, capitalizing on tin’s analogous electronic configuration and chemical properties to lead. Tin-based perovskite exhibits similar optoelectronic features to lead-based perovskite, such as high absorption coefficient and long carrier diffusion length and tin’s higher abundance than lead renders it a cost-effective and promising alternative for PSCs. The proposed PSC employs an FTO/CH3NH3GeI3/CH3NH3SnI3/GO/C structure, incorporating graphene oxide (GO) as the hole transport layer (HTL) and CH3NH3GeI3 as the electron transport layer (ETL). Graphene oxide, renowned for its exceptional electrical conductivity and low processing costs, enables efficient hole transfer, while the use of CH3NH3GeI3 as ETL not only ensures seamless electron transfer due to its compatible crystallographic structure with CH3NH3SnI3 but also mitigates interface defects, making it a critical aspect of the design. Carbon is used as the back contact, providing a cost-effective option to increase sustainability. The absorber layer parameters, such as the thickness of the absorber layer and acceptor density, are optimized. The effects of defect density, interface defects of HTL/absorber and ETL/absorber, as well as series and shunt resistance, are also analyzed. By optimizing absorber layer parameters, the solar cell attains a power conversion efficiency (PCE) of 24.11% and a fill factor exceeding 85% within the visible light spectrum range, showcasing the potential for a high-performance, environment friendly, and cost-effective solar cell substitute. Device simulations were performed using the SCAPS-1D tool.

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Study the effect of band offsets on the performance of lead-free double perovskite solar cell

Cited by 17 publications

References 37 publications

Stacking Interactions and Photovoltaic Performance of Cs₂AgBiBr₆ Perovskite

Stacking Interactions and Photovoltaic Performance of Cs₂AgBiBr₆ Perovskite

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

Design of a low-cost, environment friendly perovskite solar cell with synergic effect of graphene oxide-based HTL and CH₃NH₃GeI₃ as ETL

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Study the effect of band offsets on the performance of lead-free double perovskite solar cell

Cited by 17 publications

References 37 publications

Stacking Interactions and Photovoltaic Performance of Cs2AgBiBr6 Perovskite

Stacking Interactions and Photovoltaic Performance of Cs2AgBiBr6 Perovskite

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

Design of a low-cost, environment friendly perovskite solar cell with synergic effect of graphene oxide-based HTL and CH3NH3GeI3 as ETL

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Product

Resources

About

Stacking Interactions and Photovoltaic Performance of Cs₂AgBiBr₆ Perovskite

Stacking Interactions and Photovoltaic Performance of Cs₂AgBiBr₆ Perovskite

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

Design of a low-cost, environment friendly perovskite solar cell with synergic effect of graphene oxide-based HTL and CH₃NH₃GeI₃ as ETL