Low-temperature solution-processed Li-doped SnO2 as an effective electron transporting layer for high-performance flexible and wearable perovskite solar cells

Park, Minwoo; Kim, Jae Yup; Son, Hae Jung; Lee, Chul‐Ho; Jang, Seung Soon; Ko, Min Jae

doi:10.1016/j.nanoen.2016.04.060

Cited by 454 publications

(289 citation statements)

References 29 publications

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“…Park et al have tried to dope SnO 2 by Li element via mixing SnCl 2 ·2H 2 O with bis(trifluoromethane)sulfonimide lithium salt (Li‐TFSI) . They found the Li‐doped SnO 2 enhanced conductivity and induced a downward shift of the conduction band of SnO 2 , which facilitated electrons injection and transfer from perovskite to SnO 2 , finally, they get the efficiency of 18.2%.…”

Section: Modification Of Sno2mentioning

confidence: 99%

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

Jiang

Zhang

You

2018

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761

504

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The highest power conversion efficiency of perovskite solar cells is beyond 22%. Charge transport layers are found to be critical for device performance and stability. A traditional electron transport layer (ETL), such as TiO , is not very efficient for charge extraction at the interface, especially in planar structure. In addition, the devices using TiO suffer from serious degradation under ultraviolet illumination. SnO owns a better band alignment with the perovskite absorption layer and high electron mobility, which is helpful for electron extraction. In this Review, recent progresses in efficient and stable perovskite solar cells using SnO as ETL are summarized.

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Section: Modification Of Sno2mentioning

confidence: 99%

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

Jiang

Zhang

You

2018

Small

761

504

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“…Finally, 150 nm Ag was thermally evaporated onto the HTM layer in vacuum to act as the cathode. The cell area is 0.09 cm 2 . While moving, the samples were placed in special boxes filled with nitrogen, and the device was stored in cabinet with flowing N2 gas.…”

Section: Fabrication Of Perovskite Solar Cellsmentioning

confidence: 99%

“…Recent progress in perovskite solar cells (PSCs) has attracted great attention due to the rapid improvement of their power conversion efficiency (PCE) from initial 3.8% in 2009 to certified 22.1% in 2016 [1][2][3][4][5][6][7][8][9]. Selective extraction of photo-generated electrons and holes that inhibits charge recombination is necessary for achieving high efficiency in PSCs [10], and the exploration of the effective electron selective layer (ESL) remains a challenging scientific issue.…”

Section: Introductionmentioning

confidence: 99%

“…In previous studies, attempts have been made to decrease the processing temperature of SnO2 to 180°C on the fluorine doped tin oxide (FTO) glass [2,29], and to 150°C for SnO2 nanocrystalline film with particle size of 22-43 nm [30]. Liu et al [31] reported an even lower processing temperature of 140°C to achieve an effective electron selection and a high PCE greater than 15%.…”

Section: Introductionmentioning

confidence: 99%

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A sintering-free, nanocrystalline tin oxide electron selective layer for organometal perovskite solar cells

Zhao

Liu

et al. 2017

Sci. China Mater.

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Effective electron selective layer (ESL) is critical for the power conversion efficiency in organometal halidebased perovskite solar cells (PSCs). In this work, a spincoating process has been developed to fabricate high quality nanocrystalline SnO2 film at 100°C without further sintering at higher temperature. When used as ESL in PSCs, such SnO2 film shows greater electron extraction ability and higher efficiency than TiO2 film processed under similar condition, as evidenced by the efficient time-resolved photoluminescence (TRPL) quenching SnO2/CH3NH3PbI3 film. As a result, the SnO2-based PSCs possess higher open circuit voltage of 0.91 V, short circuit current density of 20.73 mA cm -2 , and fill factor of 64.25%, corresponding to a conversion efficiency of 12.10%, compared with 7.16% of TiO2-based PSCs. This demonstrates the great potential of applying spin-coating sintering-free process for the low-cost and large-scale manufacturing of PSCs.

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“…Very, recently, low temperature processed and TiCl 4 treatment of TiO x films showed improved devices characteristic in comparison to the untreated one. 42,43 However, the surface modified or treated PSCs devices have suffered from the huge hysteresis in forward and backward scans. Therefore, it is of utmost importance to fabricate a pinhole-free, ETL layer for high efficient devices.…”

mentioning

confidence: 99%

Tuning of perovskite solar cell performance via low-temperature brookite scaffolds surface modifications

et al. 2017

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The nature of metal oxide scaffold played a pivotal role for the growth of high quality perovskites and subsequently facilitates efficient photovoltaics devices. We demonstrate an effective way to fabricate a low-temperature TiO2 brookite scaffold layer with a uniform and pinhole-free layer for enhancing photovoltaic properties of perovskite solar cells. Various concentrations of TiCl4 were used to modify brookite TiO2 for efficient charge generation and fast charge extraction. We observed that the brookite layer with an appropriate TiCl4 treatment possesses a smooth surface with full coverage of the substrates, whereas TiCl4 treatment further improves the contact of the TiO2/perovskite interface which facilitates charge extraction and drastically influenced charge recombination. The surface treated brookite scaffolds perovskite devices showed an improved performance with an average power conversion efficiency more than 17%. The time resolved photoluminescence showed that the treated samples have obvious effect on the charge carrier dynamics. The striking observation of this study was very low appearance of hysteresis and high reproducibility in the treated samples, which opens up the possibilities for the fabrication of high efficient devices at relatively low temperatures with negligible hysteresis via facile surface modifications.

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Low-temperature solution-processed Li-doped SnO2 as an effective electron transporting layer for high-performance flexible and wearable perovskite solar cells

Cited by 454 publications

References 29 publications

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

A sintering-free, nanocrystalline tin oxide electron selective layer for organometal perovskite solar cells

Tuning of perovskite solar cell performance via low-temperature brookite scaffolds surface modifications

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Low-temperature solution-processed Li-doped SnO2 as an effective electron transporting layer for high-performance flexible and wearable perovskite solar cells

Cited by 454 publications

References 29 publications

SnO2: A Wonderful Electron Transport Layer for Perovskite Solar Cells

SnO2: A Wonderful Electron Transport Layer for Perovskite Solar Cells

A sintering-free, nanocrystalline tin oxide electron selective layer for organometal perovskite solar cells

Tuning of perovskite solar cell performance via low-temperature brookite scaffolds surface modifications

Contact Info

Product

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SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells