<i>In situ</i> formation of a 2D/3D heterostructure for efficient and stable CsPbI<sub>2</sub>Br solar cells

Tai, Meiqian; Zhou, Yu; Yin, Xuewen; Han, Jianhua; Zhang, Qi; Zhou, Yangying; Lin, Hong

doi:10.1039/c9ta08564e

Cited by 70 publications

(63 citation statements)

References 37 publications

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“…[ 32,33 ] Although some works have reported the in situ construction of 2D perovskite by depositing ammonium salt in chlorobenzene with dimethyl sulfoxide (DMSO) as additive, the inevitable damage of 3D perovskite caused by DMSO resulted in inferior performance. [ 34 ] Therefore, it is important to develop a facile, controllable, and efficient method to construct 2D/3D heterojunction for passivating the surface defects and facilitating charge extraction at the interface to enhance device performance and stability.…”

Section: Introductionmentioning

confidence: 99%

Modifying Surface Termination of CsPbI₃ Grain Boundaries by 2D Perovskite Layer for Efficient and Stable Photovoltaics

Liu

Zhang

Qin

et al. 2021

Adv Funct Materials

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It is highly desirable for all‐inorganic perovskite solar cells (PVSCs) to have reduced nonideal interfacial charge recombination in order to improve the performance. Although the construction of a 2D capping layer on 3D perovskite is an effective way to suppress interfacial nonradiative recombination, it is difficult to apply it to all‐inorganic perovskites because of the resistance of Cs+ cesium ions in cation exchange reactions. To alleviate this problem, a simple approach using an ultra‐thin 2D perovskite to terminate CsPbI3 grain boundaries (GBs) without damaging the original 3D perovskite is developed. The 2D perovskite at the GBs not only enhances the charge‐carrier extraction and transport but also effectively suppresses nonradiative recombination. In addition, because the 2D perovskite can prevent the moisture and oxygen from penetrating into the GBs and at the same time suppress the ion migration, the 2D terminated CsPbI3 films exhibit significantly improved stability against humidity. Moreover, the devices without encapsulation can retain ≈81% of its initial power conversion efficiency (PCE) after being stored at 40 ± 5% relative humidity for 84 h. The 2D‐based champion device exhibits a high PCE of 18.82% with a high open‐circuit voltage of 1.16 V.

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Section: Introductionmentioning

confidence: 99%

Modifying Surface Termination of CsPbI₃ Grain Boundaries by 2D Perovskite Layer for Efficient and Stable Photovoltaics

Liu

Zhang

Qin

et al. 2021

Adv Funct Materials

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“…[ 48 ] What's more, the formed RP perovskites via introducing large space cations into the unstable perovskites can also stabilize the phase structure. [ 27,49,50 ] Benefiting from these merits, RP halide perovskites are suitable for PSC applications and hopefully resolve the problem of stability that 3D PSCs are faced with.…”

Section: Fundamental Understanding Of Rp Perovskites Film In Pscsmentioning

confidence: 99%

High‐Quality Ruddlesden–Popper Perovskite Film Formation for High‐Performance Perovskite Solar Cells

et al. 2021

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In the last decade, perovskite solar cells (PSCs) have undergone unprecedented rapid development and become a promising candidate for a new‐generation solar cell. Among various PSCs, typical 3D halide perovskite‐based PSCs deliver the highest efficiency but they suffer from severe instability, which restricts their practical applications. By contrast, the low‐dimensional Ruddlesden–Popper (RP) perovskite‐based PSCs have recently raised increasing attention due to their superior stability. Yet, the efficiency of RP perovskite‐based PSCs is still far from that of the 3D counterparts owing to the difficulty in fabricating high‐quality RP perovskite films. In pursuit of high‐efficiency RP perovskite‐based PSCs, it is critical to manipulate the film formation process to prepare high‐quality RP perovskite films. This review aims to provide comprehensive understanding of the high‐quality RP‐type perovskite film formation by investigating the influential factors. On this basis, several strategies to improve the RP perovskite film quality are proposed via summarizing the recent progress and efforts on the preparation of high‐quality RP perovskite film. This review will provide useful guidelines for a better understanding of the crystallization and phase kinetics during RP perovskite film formation process and the design and development of high‐performance RP perovskite‐based PSCs, promoting the commercialization of PSC technology.

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“…Reproduced with permission. [83] Copyright 2019, The Royal Society of Chemistry. www.advancedsciencenews.com perovskites films, as hybrid perovskites could easily exchange cations with long-chain alkyl-ammonium halides.…”

Section: D/3d Heterostructuresmentioning

confidence: 99%

“…The optimized 2D/3D planar PSC with the structure of FTO/TiO 2 ‐PC61BM/perovskite/spiro‐OMeTAD/Au showed a PCE of 14.5% with significantly enhanced moisture resistance, maintaining over 80% PCE after storage for 50 d in ambient air (10% RH for 25 d and 25% RH for 25 d) (Figure 9k). [ 83 ]…”

Section: Molecular Engineering In Cspbx3 Pscsmentioning

confidence: 99%

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Roles of Organic Molecules in Inorganic CsPbX₃ Perovskite Solar Cells

Wang

Dong

Liu

et al. 2020

Advanced Energy Materials

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solution processes and have been proved to have similar optoelectronic properties with their organic counterparts. [24][25][26] So far, CsPbX 3 perovskites have been widely studied as alternative light absorbers in PSCs and considerable efforts are being made to improve device performance. [27][28][29][30][31][32][33][34] Among these efforts, organic molecular engineering in CsPbX 3 perovskites are the most straightforward method to improve device stability and PCE. [31,32] Since CsPbX 3 PSCs were first reported in 2015, great progress has been made on organic molecular engineering and over 19% PCE has been achieved. [35][36][37][38][39] In this review, we systematically reviewed and discussed the current development of organic molecular engineering in inorganic CsPbX 3 PSCs. First, structure evolution induced by organic molecular engineering was demonstrated. Then, the progresses on the inorganic CsPbX 3 PSCs will be reviewed and discussed in detail according to different molecule function (alloying in perovskite structures, as sacrificial agents, forming 2D structures, and modifying surfaces and interfaces). Finally, the current issues of molecular engineering will be pointed out and future directions will be highlighted.

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In situ formation of a 2D/3D heterostructure for efficient and stable CsPbI₂Br solar cells

Abstract: A 2D/3D heterostructure was formed based on inorganic CsPbI2Br perovskite, contributing to a high efficiency device with enhanced stability.

Cited by 70 publications

References 37 publications

Modifying Surface Termination of CsPbI₃ Grain Boundaries by 2D Perovskite Layer for Efficient and Stable Photovoltaics

Modifying Surface Termination of CsPbI₃ Grain Boundaries by 2D Perovskite Layer for Efficient and Stable Photovoltaics

High‐Quality Ruddlesden–Popper Perovskite Film Formation for High‐Performance Perovskite Solar Cells

Roles of Organic Molecules in Inorganic CsPbX₃ Perovskite Solar Cells

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In situ formation of a 2D/3D heterostructure for efficient and stable CsPbI2Br solar cells

Abstract: A 2D/3D heterostructure was formed based on inorganic CsPbI2Br perovskite, contributing to a high efficiency device with enhanced stability.

Cited by 70 publications

References 37 publications

Modifying Surface Termination of CsPbI3 Grain Boundaries by 2D Perovskite Layer for Efficient and Stable Photovoltaics

Modifying Surface Termination of CsPbI3 Grain Boundaries by 2D Perovskite Layer for Efficient and Stable Photovoltaics

High‐Quality Ruddlesden–Popper Perovskite Film Formation for High‐Performance Perovskite Solar Cells

Roles of Organic Molecules in Inorganic CsPbX3 Perovskite Solar Cells

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In situ formation of a 2D/3D heterostructure for efficient and stable CsPbI₂Br solar cells

Modifying Surface Termination of CsPbI₃ Grain Boundaries by 2D Perovskite Layer for Efficient and Stable Photovoltaics

Modifying Surface Termination of CsPbI₃ Grain Boundaries by 2D Perovskite Layer for Efficient and Stable Photovoltaics

Roles of Organic Molecules in Inorganic CsPbX₃ Perovskite Solar Cells