Low-temperature SnO<sub>2</sub>-modified TiO<sub>2</sub> yields record efficiency for normal planar perovskite solar modules

Ding, Bin; Huang, Shi-Yu; Chu, Qian-Qian; Li, Yan; Li, Chang-Jiu

doi:10.1039/c8ta01192c

Cited by 85 publications

(49 citation statements)

References 66 publications

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“…In a low-temperature anneal at 120 °C, a TiO 2 layer can be also formed based on aqueous TiCl 4 . Although the resultant TiO 2 /SnO 2 composite can contribute a maximum PCE of 21.27% [23], this PCE is still restricted by the amorphous phase of TiO 2 here [17]. Therefore, it is still deserved to adjust the Ti component on its lattice phase and nanostructure for gaining higher PCE of device.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

et al. 2020

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HIGHLIGHTS• Nanoscale multi-dimensional heterojunctions in situ grow at the edge of two-dimensional MXene conductive network.• A controlled anneal procedure in 150 °C is for preparing anatase TiO 2 /SnO 2 heterojunctions with oxygen vacancy scramble effect.• The perovskite solar cells achieve high power conversion efficiency and high moisture-resistance stability.ABSTRACT A multi-dimensional conductive heterojunction structure, composited by TiO 2 , SnO 2 , and Ti 3 C 2 T X MXene, is facilely designed and applied as electron transport layer in efficient and stable planar perovskite solar cells.Based on an oxygen vacancy scramble effect, the zero-dimensional anatase TiO 2 quantum dots, surrounding on two-dimensional conductive Ti 3 C 2 T X sheets, are in situ rooted on three-dimensional SnO 2 nanoparticles, constructing nanoscale TiO 2 /SnO 2 heterojunctions. The fabrication is implemented in a controlled lowtemperature anneal method in air and then in N 2 atmospheres. With the optimal MXene content, the optical property, the crystallinity of perovskite layer, and internal interfaces are all facilitated, contributing more amount of carrier with effective and rapid transferring in device. The champion power conversion efficiency of resultant perovskite solar cells achieves 19.14%, yet that of counterpart is just 16.83%. In addition, it can also maintain almost 85% of its initial performance for more than 45 days in 30-40% humidity air; comparatively, the counterpart declines to just below 75% of its initial performance.

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Section: Introductionmentioning

confidence: 99%

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

et al. 2020

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“…To identify the SnO 2 ‐induced impact on TiO 2 , the performance of PSCs based on the different ETLs was investigated, which clarified that the SnO 2 on TiO 2 had improved the photovoltaic performance dramatically. Ding et al also used SnO 2 to treat TiO 2 films . The preparation process of ETL was described as following.…”

Section: Enhancing Performance Of Pscsmentioning

confidence: 99%

“…The lower‐temperature annealing also makes it compatible with the fabrication process of flexible PSCs. Until now, the highest PCE for PSCs based on SnO 2 has reached more than 21%, which is the highest PCE for the planar structure PSCs . The development of SnO 2 ‐based PSCs is shown in Figure a.…”

Section: Introductionmentioning

confidence: 98%

SnO₂‐Based Perovskite Solar Cells: Configuration Design and Performance Improvement

Liu

Wang

et al. 2019

Solar RRL

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Organic‐inorganic hybrid perovskite solar cells (PSCs) have developed rapidly in recent years owing to the low cost and high power conversion efficiency achieved. The excellent performance of PSCs is attributed to the superior electrical properties of each layer, including the electron transport layer (ETL), light‐harvest layer, hole transport layer. As one of the most promising ETL materials for PSCs, SnO2 shows excellent transmission, an appropriate energy band gap, a deep conduction band level, and high electron mobility, leading to efficient electron extraction and transport. Here, recent advancements in the PSCs with SnO2 ETLs and endeavors aimed at improving the performance of this photovoltaic device are reviewed. Several typical configurations of SnO2 based PSCs are discussed, including the planar structure, mesoporous structure, inverted structure and flexible PSCs. The efforts of modification and composite SnO2 with other metal oxides are also assessed. Finally, an overview of the perspectives and challenges for the future of SnO2 based PSCs is provided.

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“…[33] Ding et al reported a three-step CBD process, taking several hours, to coat the SnO 2 -based ESL, and they fabricated a device through the gas-pumping method with a PCE of 21.96 %. [34] Although the use of the CBD methods to deposit SnO 2 as the ESL in PSCs has achieved success, it is a very timeconsuming process for suppressing self-aggregation, which counters the methodological advantages of the CBD process and limits its versatile application. Additionally, it is still not understood why the J-V hysteresis is alleviated in the charge transport dynamics of SnO 2 -based PSCs but not in the TiO 2based PSCs.…”

Section: Introductionmentioning

confidence: 99%

Self‐Aggregation‐Controlled Rapid Chemical Bath Deposition of SnO₂ Layers and Stable Dark Depolarization Process for Highly Efficient Planar Perovskite Solar Cells

Kim

Lee

et al. 2020

ChemSusChem

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Planar perovskite solar cells (PSCs) incorporating n‐type SnO2 have attracted significant interest because of their excellent photovoltaic performance. However, the film fabrication of SnO2 is limited by self‐aggregation and inhomogeneous growth of the intermediate phase, which produces poor morphology and properties. In this study, a self‐controlled SnO2 layer is fabricated directly on a fluorine‐doped tin oxide (FTO) surface through simple and rapid chemical bath deposition. The PSCs based on this hydrolyzed SnO2 layer exhibit an excellent power conversion efficiency of 20.21 % with negligible hysteresis. Analysis of the electrochemical impedance spectroscopy on the charge transport dynamics indicates that the bias voltage influences both interfacial charge transportation and the ionic double layer under illumination. The hydrolyzed SnO2‐based PSCs demonstrate a faster ionic charge response time of 2.5 ms in comparison with 100.5 ms for the hydrolyzed TiO2‐based hysteretic PSCs. The results of quasi‐steady‐state carrier transportation indicate that a dynamic hysteresis in the J–V curves can be explained by complex ionic‐electronic kinetics owing to the slow ionic charge redistribution and hole accumulation caused by electrode polarization, which causes an increase in charge recombination. This study reveals that SnO2‐based PSCs lead to a stabilized dark depolarization process compared with TiO2‐based PSCs, which is relevant to the charge transport dynamics in the high‐performing planar SnO2‐based PSCs.

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Low-temperature SnO₂-modified TiO₂ yields record efficiency for normal planar perovskite solar modules

Abstract: SnO2-modified TiO2 films fabricated at low temperatures toward stable, high-efficiency and less-hysteresis planar perovskite solar modules.

Cited by 85 publications

References 66 publications

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

SnO₂‐Based Perovskite Solar Cells: Configuration Design and Performance Improvement

Self‐Aggregation‐Controlled Rapid Chemical Bath Deposition of SnO₂ Layers and Stable Dark Depolarization Process for Highly Efficient Planar Perovskite Solar Cells

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Low-temperature SnO2-modified TiO2 yields record efficiency for normal planar perovskite solar modules

Abstract: SnO2-modified TiO2 films fabricated at low temperatures toward stable, high-efficiency and less-hysteresis planar perovskite solar modules.

Cited by 85 publications

References 66 publications

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

SnO2‐Based Perovskite Solar Cells: Configuration Design and Performance Improvement

Self‐Aggregation‐Controlled Rapid Chemical Bath Deposition of SnO2 Layers and Stable Dark Depolarization Process for Highly Efficient Planar Perovskite Solar Cells

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Low-temperature SnO₂-modified TiO₂ yields record efficiency for normal planar perovskite solar modules

SnO₂‐Based Perovskite Solar Cells: Configuration Design and Performance Improvement

Self‐Aggregation‐Controlled Rapid Chemical Bath Deposition of SnO₂ Layers and Stable Dark Depolarization Process for Highly Efficient Planar Perovskite Solar Cells