Multifunctional zwitterion modified SnO2 nanoparticles for efficient and stable planar perovskite solar cells

Li, Benyi; Wang, Peng; Shao, Mengting; Bao, Jiahui; Wu, Xiaoping; Lin, Ping; Xu, Lingbo; Yu, Xuegong; Cui, Can

doi:10.1016/j.orgel.2022.106519

Cited by 8 publications

(5 citation statements)

References 53 publications

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“…Upon interaction with SnO 2 , these peaks shift to 1637 and 2418 cm –1 , respectively, indicating a strong interaction between the H–O bonds in KH 2 PO 4 and the unbridged oxygen O in SnO 2 . Additionally, the stretching vibration peak of Sn–O bonds in the SnO 2 /KH 2 PO 4 sample shifts to a higher wavenumber, from 619 to 630 cm –1 , which can be attributed to the interaction between Sn 4+ and the PO group …”

Section: Results and Discussionmentioning

confidence: 93%

“…Upon Additionally, the stretching vibration peak of Sn−O bonds in the SnO 2 /KH 2 PO 4 sample shifts to a higher wavenumber, from 619 to 630 cm −1 , which can be attributed to the interaction between Sn 4+ and the P�O group. 33 To further confirm the interaction between SnO 2 and KH 2 PO 4 , X-ray photoelectron spectroscopy (XPS) analysis was conducted, and the survey scan is presented in Figure S1 in the Supporting Information. Figure 1f reveals the Sn 3d 5/2 and Sn 3d 3/2 peaks for SnO 2 /KH 2 PO 4 shifting to higher binding energy compared to pristine SnO 2 .…”

Section: Resultsmentioning

confidence: 99%

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Multifunctional Interface Treatment of Phosphate for High-Efficiency Perovskite Solar Cells

Zou,

Lin,

et al. 2023

ACS Appl. Energy Mater.

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An electron transport layer (ETL)/perovskite interface with abundant defects and energy level mismatch can lead to severe nonradiative recombination and reduce the efficiency in perovskite solar cells (PSCs). Thus, achieving an excellent ETL/perovskite interface is crucial for the development of high-efficiency PSCs. Herein, we present a method to enhance the interface between SnO2 and the perovskite using an inorganic phosphate compound with appropriate functional groups. By leveraging the multifunctional effects of Sn4+ and Pb2+ ions and PO bonds, as well as the formation of hydrogen bonds between the perovskite and phosphate, we successfully engineered an exceptional interface characterized by a reduced number of defect states and improved energy level alignment. The optimization of the SnO2/perovskite interface led to an impressive power conversion efficiency of 21.84% for methylammonium lead triiodide (MAPbI3) PSCs, with improved stability in the air environment. The findings of our work present an effective strategy for modifying the ETL/perovskite interface with suitable functional groups for high-performance and stable PSCs.

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Section: Results and Discussionmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Multifunctional Interface Treatment of Phosphate for High-Efficiency Perovskite Solar Cells

Zou,

Lin,

et al. 2023

ACS Appl. Energy Mater.

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“…In addition, electrical conductivity of the PDA: SnO 2 and SnO 2 films were estimated by J – V curves, as displayed in Figure S7b, Supporting Information, where the slope of the PDA: SnO 2 film is marginally steeper than that of the SnO 2 film, possibly due to the n‐doping effect of PDA. [ 44 ] Hence, it is reasonable to conclude that the defect density of PDA: SnO 2 ETLs has been reduced, the corresponding electron mobility and conductivity have been improved as well.…”

Section: Resultsmentioning

confidence: 99%

Ameliorating the Interfacial Mismatch of SnO₂ and Perovskite Enabling High Mechanical Stability for Flexible Perovskite Solar Cells

Wang,

Jiang,

et al. 2023

Solar RRL

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SnO2 has been a widely used electron transport layer, due to its high electron mobility and stable chemical properties in n–i–p type perovskite solar cells (PSCs). However, the interfacial mismatch, especially on the residual strain and the different mechanical properties between SnO2 and perovskite films, leads to an obvious decrease in power conversion efficiency (PCE) and flexibility in the SnO2‐based PSCs. This limitation has severely hindered the large‐scale implementation of flexible PSCs. Herein, polydopamine is introduced in SnO2 as “depletion intermediary”, which significantly improves the interfacial contact and mitigates the inherent brittleness of SnO2 film. The obtained PSCs have achieved a PCE of 22.70% and 21.04% based on the rigid and flexible devices, respectively. Most importantly, the flexibility has been largely improved, that after 3000 bending cycles with a 5 mm bending radius, approximately 87% of its original efficiency has been retained.

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“…Subsequently, Jiang, Q et al [ 31 ] reported the development of high-efficiency perovskite solar cells using SnO 2 as an ETL, benefiting from lower energy levels at the bottom of the conduction band (ECBM), facilitating electron transfer and reducing charge accumulation at the interface. Yet, lattice mismatches and oxygen vacancies at the ETL/perovskite interface significantly affect the performance of SnO 2 -based perovskite solar cells [ 31 , 32 , 33 ]. These cells exhibit relatively low electroluminescent external quantum efficiency (EQE), resulting in higher open-circuit voltage ( V oc ) losses due to the lower ECBM [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of TiO2/SnO2 Electron Transport Layer for Performance Enhancement of All-Inorganic Perovskite Solar Cells Using Electron Beam Evaporation at Low Temperature

Xue,

Li,

Chen

et al. 2023

Micromachines

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SnO2 has attracted much attention due to its low-temperature synthesis (ca. 140 °C), high electron mobility, and low-cost manufacturing. However, lattice mismatch and oxygen vacancies at the SnO2/CsPbI3−xBrx interface generally lead to undesirable nonradiative recombination in optoelectronic devices. The traditional TiO2 used as the electron transport layer (ETL) for all-inorganic perovskite solar cells (PSCs) requires high-temperature sintering and crystallization, which are not suitable for the promising flexible PSCs and tandem solar cells, raising concerns about surface defects and device uniformity. To address these challenges, we present a bilayer ETL consisting of a SnO2 layer using electron beam evaporation and a TiO2 layer through the hydrothermal method, resulting in an enhanced performance of the perovskite solar cell. The bilayer device exhibits an improved power conversion efficiency of 11.48% compared to the single-layer device (8.09%). The average fill factor of the bilayer electron transport layer is approximately 15% higher compared to the single-layer electron transport layer. Through a systematic investigation of the use of ETL for CsPb3−xBrx PSCs on optical and electronic properties, we demonstrate that the SnO2/TiO2 is an efficient bilayer ETL for PSCs as it significantly enhances the charge extraction capability, suppresses carrier recombination at the ETL/perovskite interface, facilitates efficient photogenerated carrier separation and transport, and provides high current density and reduced hysteresis.

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Multifunctional zwitterion modified SnO2 nanoparticles for efficient and stable planar perovskite solar cells

Cited by 8 publications

References 53 publications

Multifunctional Interface Treatment of Phosphate for High-Efficiency Perovskite Solar Cells

Multifunctional Interface Treatment of Phosphate for High-Efficiency Perovskite Solar Cells

Ameliorating the Interfacial Mismatch of SnO₂ and Perovskite Enabling High Mechanical Stability for Flexible Perovskite Solar Cells

Preparation of TiO2/SnO2 Electron Transport Layer for Performance Enhancement of All-Inorganic Perovskite Solar Cells Using Electron Beam Evaporation at Low Temperature

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Multifunctional zwitterion modified SnO2 nanoparticles for efficient and stable planar perovskite solar cells

Cited by 8 publications

References 53 publications

Multifunctional Interface Treatment of Phosphate for High-Efficiency Perovskite Solar Cells

Multifunctional Interface Treatment of Phosphate for High-Efficiency Perovskite Solar Cells

Ameliorating the Interfacial Mismatch of SnO2 and Perovskite Enabling High Mechanical Stability for Flexible Perovskite Solar Cells

Preparation of TiO2/SnO2 Electron Transport Layer for Performance Enhancement of All-Inorganic Perovskite Solar Cells Using Electron Beam Evaporation at Low Temperature

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Ameliorating the Interfacial Mismatch of SnO₂ and Perovskite Enabling High Mechanical Stability for Flexible Perovskite Solar Cells