Simultaneous Passivation of the SnO<sub>2</sub>/Perovskite Interface and Perovskite Absorber Layer in Perovskite Solar Cells Using KF Surface Treatment

Xu, Pengyu; He, Haiyan; Ding, Jie; Wang, Peng; Piao, Hongjing; Bao, Jiahui; Zhang, Weihao; Wu, Xiaoping; Xu, Lingbo; Lin, Ping; Yu, Xuegong

doi:10.1021/acsaem.1c01893

Cited by 42 publications

(37 citation statements)

References 49 publications

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“…The Nb 5+ spectra downshift to lower binding energy simultaneously due to the change of the chemical state. [ 41,43 ] The results indicate that hydrogen plays an important role in the activation and deactivation processes of passivation, for both the HF and RCA pretreated c‐Si.…”

Section: Resultsmentioning

confidence: 97%

Activation and Deactivation of Silicon Surface Passivation by Niobium Oxide Films

Liu

Gao

et al. 2022

Physica Rapid Research Ltrs

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Niobium oxide (Nb2O5) films can provide excellent passivation for crystalline silicon (c‐Si) surface after postdeposition annealing, however, its kinetic behavior and mechanism have not been explored. Herein, it is demonstrated that surface passivation by solution‐processed Nb2O5 films can be activated by low‐temperature annealing (<200 °C) within several minutes, with the activation energy of 0.40 and 0.57 eV for hydrofluoric acid (HF) and RCA pretreated surfaces, respectively. Moreover, passivation is deactivated by higher‐temperature annealing (>350 °C), with the deactivation energy of 0.86 and 1.06 eV for HF and RCA pretreated surfaces, respectively. The results combined with surface‐sensitive X‐Ray photoelectron spectroscopy (XPS) measurements indicate that the passivation kinetics of Nb2O5 on the surface of c‐Si are strongly related to the diffusion of hydrogen into and out of the Nb2O5/c‐Si interface.

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Section: Resultsmentioning

confidence: 97%

Activation and Deactivation of Silicon Surface Passivation by Niobium Oxide Films

Liu

Gao

et al. 2022

Physica Rapid Research Ltrs

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“…[ 24 ] The lower defects intensity of Co–SnO 2 than pristine SnO 2 is better for the charge transfer and final performance of PSCs. [ 25 ]…”

Section: Resultsmentioning

confidence: 99%

“…[24] The lower defects intensity of Co-SnO 2 than pristine SnO 2 is better for the charge transfer and final performance of PSCs. [25] To explore the crystallization of pristine SnO 2 and Co-SnO 2 ETLs, we did the morphology and crystallinity characterizations. The scanning electron microscope (SEM) images of pristine SnO 2 and Co-SnO 2 films are shown in Figure S5a-d, Supporting Information.…”

Section: Properties Of Sno 2 Etls Through Cobalt Modifyingmentioning

confidence: 99%

Efficient Flexible Perovskite Solar Cells with Reduced Hysteresis Employing Cobalt Nitrate Treated SnO₂

et al. 2022

Solar RRL

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Flexible perovskite solar cells (PSCs) have great potential for portable electronics, however, suffer from large hysteresis in regular structure. Insufficient charge extraction in commonly used tin dioxide (SnO 2 ) electron transporting layer (ETL) is regarded as one possible origin of hysteresis due to the low crystallinity and energy level mismatching. Here, the hysteresis of flexible PSCs is suppressed by synthesizing cobalt-modified SnO 2 ETLs, which improve electron extraction capability due to the high carrier mobility and well-aligned energy levels. Moreover, cobalt modification passivates the defects on the ETL surface, facilitates sequential perovskite film growth, and inhibits carrier recombination. As a result, flexible PSCs with efficiencies exceeding 20% are obtained with significantly reduced hysteresis and enhanced illumination stability. Comprehensive optoelectronic simulations are conducted to unveil the deep mechanisms of eliminated hysteresis. The proposed work provides an efficient and facile strategy for the fabrication of high-performance flexible PSCs upon future commercialization.

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“…K + ions diffused into the bulk MAPbI 3 film to passivate the grain boundaries and point defects, whereas F − ions passivated the SnO 2 surface trap defects by eliminating the formation of hydroxyl groups. [284] Zuo et al introduced different functional groups onto the surface of SnO 2 by depositing various self-assembly monolayers (SAMs), which formed different chemical interactions with the perovskite film. [285] Later in 2020, Yan et al reported a choline chloride SAM on the surface of SnO 2 , which acted as a passivation layer.…”

Section: The Role Of Etl In the Performance Of Planar N-i-p Structure...mentioning

confidence: 99%

Section: Common Solar Cell Structures and Their Effect On Performancementioning

confidence: 99%

Configuration of Methylammonium Lead Iodide Perovskite Solar Cell and its Effect on the Device's Performance: A Review

Dahal

2022

Adv Materials Inter

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Since it is a source of clean energy, harnessing solar power is a natural solution to resolving the prevalent energy crisis. A solar cell is the most effective device to convert solar energy into electricity. Hence, a study on solar cells is the utmost area of interest in the energy sector.As illustrated in Figure 1, there are three generations of solar cells. Among these, the first-generation cells were of p-n homojunction on a silicon crystal, where the thickness of the absorbing layer was more than 180 µm. Mainly, silicon (Si) and germanium (Ge), indirect bandgap materials, assemble the cell. Single crystal silicon solar cells exhibit a conversion efficiency of about 26.7% and dominate the current solar cell market. [2] The second-generation solar cells are heterojunction solar cells using direct bandgap thin film materials (CdS, CIGS, etc.). The demerits of the first and second-generation solar cells are the cost of semiconducting materials, limited availability, and toxicity to human health. Emerging thirdgeneration solar cells act as an alternative. These include dyesensitized solar cells (DSSCs), organic photovoltaics, quantum dots, and perovskite solar cells (PSCs). Among all those, PSCs are at the center of the emerging photovoltaic technology with rapid improvement in the performance within a few years of discovering the first perovskite cell. Figure 2 depicts the different types of solar cells and their developmental trend for the past 46 years, showing that the performance of the PSCs has improved dramatically during a short period.The foundation technology for PSCs is DSSCs. In 1991, O'Regan and Grätzel developed a low-cost photochemical solar cell based on a high surface area nanocrystalline TiO 2 film sensitized with dye molecule. [4] The primary concern of DSSCs is the use of liquid electrolytes, which regenerate the dye after it injects electrons into the conduction band (CB) of the working electrodes (anode), which are mainly the thin layer of the metal oxide semiconductor. The electrolyte also acts as a hole transporting material to the counter electrodes (cathode). [5] The solid-state hole conductor emerged as a replacement to minimize leakage concerns in liquid electrolyte-based DSSCs. With several modifications in the device structures, researchers are trying to synthesize efficient DSSCs. However, the low absorption coefficientIn its initial phase in 2009, the inorganic-organic hybrid perovskite solar cells (PSCs) delivered a 3.8% power conversion efficiency (PCE), which is far below the present 25.7% PCE obtained in 2022. The significant improvement of the efficiency of PSCs in such a short period has stimulated significant interest in the photovoltaic community. However, the performance of current PSCs is behind the commercially available and widely used solar cells in terms of stability and scalability. Among various commonly studied perovskite materials, methylammonium lead iodide (MAPbI 3 ) is the most widely studied. This review will focus on the common solar cell structures (mesoporo...

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Simultaneous Passivation of the SnO₂/Perovskite Interface and Perovskite Absorber Layer in Perovskite Solar Cells Using KF Surface Treatment

Cited by 42 publications

References 49 publications

Activation and Deactivation of Silicon Surface Passivation by Niobium Oxide Films

Activation and Deactivation of Silicon Surface Passivation by Niobium Oxide Films

Efficient Flexible Perovskite Solar Cells with Reduced Hysteresis Employing Cobalt Nitrate Treated SnO₂

Configuration of Methylammonium Lead Iodide Perovskite Solar Cell and its Effect on the Device's Performance: A Review

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Simultaneous Passivation of the SnO2/Perovskite Interface and Perovskite Absorber Layer in Perovskite Solar Cells Using KF Surface Treatment

Cited by 42 publications

References 49 publications

Activation and Deactivation of Silicon Surface Passivation by Niobium Oxide Films

Activation and Deactivation of Silicon Surface Passivation by Niobium Oxide Films

Efficient Flexible Perovskite Solar Cells with Reduced Hysteresis Employing Cobalt Nitrate Treated SnO2

Configuration of Methylammonium Lead Iodide Perovskite Solar Cell and its Effect on the Device's Performance: A Review

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Simultaneous Passivation of the SnO₂/Perovskite Interface and Perovskite Absorber Layer in Perovskite Solar Cells Using KF Surface Treatment

Efficient Flexible Perovskite Solar Cells with Reduced Hysteresis Employing Cobalt Nitrate Treated SnO₂