Smoothing and coverage improvement of SnO2 electron transporting layer by NH4F treatment: Enhanced fill factor and efficiency of perovskite solar cells

Keshtmand, Razieh; Zamani-Meymian, Mohammad Reza; Mohamadkhani, Fateme; Taghavinia, Nima

doi:10.1016/j.solener.2021.09.068

Cited by 23 publications

(23 citation statements)

References 69 publications

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“…From the J – V curves in Figure a and photovoltaic parameters in Table , it can see that the hysteresis can be inhibited when SnS 2 (TU) is treated with TU and TAA. The hysteresis index of PSCs based on SnS 2 (TU), SnS 2 (TU)-TU, and SnS 2 (TU)-TAA is calculated by the equation and HI decreased from 0.21% of PSCs based SnS 2 (TU) to 0.11% and 0.05%, respectively.…”

Section: Resultssupporting

confidence: 79%

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Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

2022

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Improving the electro-optical properties of the electron transport layers (ETLs) is considered one of the most promising solutions to increase the efficiency of the perovskite solar cells (PSCs). In this study, we focused on the spin-coated tin(IV) sulfide (SnS2) as the ETL with two different sulfur sources, thiourea (TU) and thioacetamide (TAA) (SnS2(TU) and SnS2(TAA)), and investigated the effects of surface passivation of the prepared ETL with TU and TAA (SnS2-TU and SnS2-TAA). The treatment is shown to be useful in reducing the surface roughness of the SnS2 ETL and to passivate the interfacial trap states at the ETL/perovskite interface, leading to better contact between them. Among the prepared samples, the SnS2(TU) led to a smoother ETL rather than SnS2(TAA). Finally, the best results of the produced PSCs were related to the samples with SnS2(TU) and passivated with TAA (SnS2(TU)-TAA) in which the power conversion efficiency (PCE) promoted from 11.98% in the case of SnS2(TU) ETL to 15.14% in SnS2(TU)-TAA ETL with a 37% increase in power conversion efficiency (PCE). As an important role, TAA treatment could compensate the sulfur vacancy which was proved by XPS tests. Moreover, the SnS2(TU)-TAA ETL increased the long-term stability of the device without any encapsulation under ambient conditions, retaining 86% of the initial PCE after 30 days, while the device with the SnS2(TU) ETL could maintain about 64% of the original PCE.

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Section: Resultssupporting

confidence: 79%

“…2 (TU) is treated with TU and TAA. The hysteresis index of PSCs based on SnS 2 (TU), SnS 2 (TU)-TU, and SnS 2 (TU)-TAA is calculated by the equation68 …”

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confidence: 99%

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

2022

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“…The electric field relaxation in dyes can be considered by the M* factor that could be formulated in two main imaginary (M 00 ) and real (M 0 ) parts of electric modulus and can be written as eqn (11): 59 (11) where the first and second parts of eqn (11) represent the real and imaginary parts, which can be derived from e 0 and e 00 . Fig.…”

Section: Complex Electric Modulus (M*)mentioning

confidence: 99%

“…In order to achieve to clear understanding that each of the abovementioned contributors how remarkable impact on interfacial rectification is a great puzzle that has remained under speculation. [7][8][9][10][11] Among the harnessing strategies of CRRs, special attention has been paid to the molecular structures of organic dyes. The donor-p-acceptor (D-p-A) framework of organic dyes which have a rod-like molecular configuration might undergo unwanted aggregations, and consequently, foment more selfquenching and CRRs owing to D* -D energy transfer via stacking interactions p-p. 12 Such interactions impose an inefficient electron injection process on the DSSCs.…”

Section: Introductionmentioning

confidence: 99%

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Charge recombination suppression in dye-sensitized solar cells by tuning the dielectric constant of triphenylamine dyes with altering π-bridges from naphthalene to anthracene units

Chenab

Zamani-Meymian

Qashqay

2022

Phys. Chem. Chem. Phys.

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Interface Engineering via Amino Acid for Efficient and Stable Perovskite Solar Cells

Geng

Jia

et al. 2022

Adv Materials Inter

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PCE of PSCs has not yet reached its limit (30.5%), implying there is still much room for further improve the performance of PSCs.To obtain PSCs with higher photoelectric performance and higher stability, various strategies have been developed to optimize the perovskite layer and charge carrier transport layers. [10][11][12] Exploring appropriate materials as efficient electron transport layers (ETLs) is also vital to promote the rapid development of PSCs. Titanium dioxide (TiO 2 ) was initially used as ETL material in PSCs, owing to the advantages of low cost, high stability, and superior ability able to effectively transferring of electrons from the perovskite layer to the bottom electrode. However, the energy levels of TiO 2 and perovskite are not matched well. Meanwhile and the annealing temperature of TiO 2 is high (above 450 °C), which is energy consuming and incompatible with flexible devices. [13][14][15] Alternatively, tin dioxide (SnO 2 ), has become the most commonly used ETL material, due to its advantages of low-temperature manufacturing, good energy level matching, and high electron mobility. However, using SnO 2 as ETL is inevitable to encounter defects (oxygen vacancy defects) pinholes at the film surface. These defects have a significantly negative impact on the photovoltaic performance and stability performance of perovskite solar cells. [16,17] Based on this, interfacial modification and doping strategies were applied to PSCs. Ogomi et al. introduced a monolayer HOCO-R-NH 3

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Smoothing and coverage improvement of SnO2 electron transporting layer by NH4F treatment: Enhanced fill factor and efficiency of perovskite solar cells

Cited by 23 publications

References 69 publications

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

Charge recombination suppression in dye-sensitized solar cells by tuning the dielectric constant of triphenylamine dyes with altering π-bridges from naphthalene to anthracene units

Interface Engineering via Amino Acid for Efficient and Stable Perovskite Solar Cells

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Smoothing and coverage improvement of SnO2 electron transporting layer by NH4F treatment: Enhanced fill factor and efficiency of perovskite solar cells

Cited by 23 publications

References 69 publications

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS2 Electron Transporting Layer Based on Molecular Ink

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS2 Electron Transporting Layer Based on Molecular Ink

Charge recombination suppression in dye-sensitized solar cells by tuning the dielectric constant of triphenylamine dyes with altering π-bridges from naphthalene to anthracene units

Interface Engineering via Amino Acid for Efficient and Stable Perovskite Solar Cells

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Product

Resources

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Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink

Enhanced Performance of Planar Perovskite Solar Cells Using Thioacetamide-Treated SnS₂ Electron Transporting Layer Based on Molecular Ink