<i>In situ</i> growth of α-CsPbI<sub>3</sub> perovskite nanocrystals on the surface of reduced graphene oxide with enhanced stability and carrier transport quality

Zhang, Qi; Hu, Nan; Zhou, Yangying; Gu, Yin; Tai, Meiqian; Wei, Yaxuan; Hao, Feng; Li, Jianbao; Oron, Dan; Lin, Hong

doi:10.1039/c9tc01012b

Cited by 33 publications

(41 citation statements)

References 52 publications

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“…[ 16 ] Nevertheless, due to the presence of large amount of crystal boundaries in NCs film that greatly restricted charge and/or energy transfer, [ 17 ] improvement of photogenerated carriers transfer at the NC interface is necessary for applications such as photoelectric conversion and photocatalysis. [ 16b,18 ]…”

Section: Figurementioning

confidence: 99%

“…Recently, heterostructures based on perovskites NCs and 2D materials (black phosphorus, reduced graphene oxide, graphitic carbon nitride, hexagonal boron nitride, and so on) have attracted much attention. [ 16b,18a,19 ] Due to the effective protection afforded by 2D nanosheets, the stability of perovskite NCs against air, moisture, and thermal conditions has been significantly enhanced. [ 19e,f ] Moreover, 2D nanosheets act not only as flexible substrates that connect dispersed perovskite nanocrystals but also enable the effective charge and/or energy transfer transport through the heterostructure interfaces.…”

Section: Figurementioning

confidence: 99%

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In Situ Growth of MAPbBr₃ Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

Zhang

Liu

Liang

et al. 2020

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PVs) [1] and optoelectronic devices. [2] The power conversion efficiencies (PCE) of perovskite solar cells have exceeded 25% [3] in a few years since the first perovskite photovoltaics with a PCE of 3.9% came out in 2009. [4] The remarkable performance is attributed to the superior properties of perovskites such as a high and balanced carrier mobility, [5] long carrier diffusion length, [6] and large light absorption coefficient in the UV-vis range. [7] Meanwhile, metal halide perovskites in the form of colloidal nanocrystals (NCs) have drawn considerable attention in recent years. [8] Perovskite NCs could be easily synthesized at room temperature and ambient conditions with a large yield. [9] Besides, these colloidal perovskite NCs feature a number of advantages such as a high photoluminescence (PL) quantum yield, [10] narrow-band emission, [11] and tunable emission over the whole visible region. [12] Benefiting from these fascinating characteristics, perovskite NCs present promise in applications such as solutionprocessed photodetectors, [13] light-emitting diodes, [14] and solar cells. [15] Perovskite NCs have also been reported to demonstrate potential as photocatalysts due to the proper energy band structure, excellent visible-light responses, and high specific surface area. [16] Nevertheless, due to the presence of large amount of crystal boundaries in NCs film that greatly restricted charge and/or energy transfer, [17] improvement of photogenerated carriers transfer at the NC interface is necessary for applications such as photoelectric conversion and photocatalysis. [16b,18] Recently, heterostructures based on perovskites NCs and 2D materials (black phosphorus, reduced graphene oxide, graphitic carbon nitride, hexagonal boron nitride, and so on) have attracted much attention. [16b,18a,19] Due to the effective protection afforded by 2D nanosheets, the stability of perovskite NCs against air, moisture, and thermal conditions has been significantly enhanced. [19e,f ] Moreover, 2D nanosheets act not only as flexible substrates that connect dispersed perovskite nanocrystals but also enable the effective charge and/or energy transfer transport through the heterostructure interfaces. For example, Xu and co-workers reported the decoration of CsPbBr 3 NCs on porous g-C 3 N 4 nanosheets to construct the composite photocatalysts via N-Br chemical bonding. [19c] The unique N-Br bonding state leads to enhanced charge separation between the two materials. As expected, the resultant composite photocatalyst The performance of perovskite nanocrystals (NCs) in optoelectronics and photocatalysis is severely limited by the presence of large amounts of crystal boundaries in NCs film that greatly restricts energy transfer. Creating heterostructures based on perovskite NCs and 2D materials is a common approach to improve the energy transport at the perovskite/2D materials interface. Herein, methylamine lead bromide (MAPbBr 3 , MA: CH 3 NH 3 + ) perovskite NCs are homogeneously deposited on highly conductive few-layer MX...

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Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

In Situ Growth of MAPbBr₃ Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

Zhang

Liu

Liang

et al. 2020

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“…During the film deposition, device testing and storage, both water and oxygen directly affect the PSC performance and stability [102][103][104]. Taking MAPbI 3 as an example, first, water vapor can dissolve the perovskite material (3), and MAI is then decomposed to form a mixture of MA and HI (4); however, HI will either react with O 2 to form H 2 O and I 2 (5), or self-decompose (6).…”

Section: Stabilitymentioning

confidence: 99%

Hot-Casting Large-Grain Perovskite Film for Efficient Solar Cells: Film Formation and Device Performance

Liao

Xie

et al. 2020

Nano-Micro Lett.

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Organic–inorganic metal halide perovskite solar cells (PSCs) have recently been considered as one of the most competitive contenders to commercial silicon solar cells in the photovoltaic field. The deposition process of a perovskite film is one of the most critical factors affecting the quality of the film formation and the photovoltaic performance. A hot-casting technique has been widely implemented to deposit high-quality perovskite films with large grain size, uniform thickness, and preferred crystalline orientation. In this review, we first review the classical nucleation and crystal growth theory and discuss those factors affecting the hot-casted perovskite film formation. Meanwhile, the effects of the deposition parameters such as temperature, thermal annealing, precursor chemistry, and atmosphere on the preparation of high-quality perovskite films and high-efficiency PSC devices are comprehensively discussed. The excellent stability of hot-casted perovskite films and integration with scalable deposition technology are conducive to the commercialization of PSCs. Finally, some open questions and future perspectives on the maturity of this technology toward the upscaling deposition of perovskite film for related optoelectronic devices are presented.

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“…Zhang et al introduced reduced graphene oxide (rGO) to form heterostructures with perovskite layers (Figure 11c). [ 114 ] Due to the excellent thermal conductivity of rGo, carrier mobility, hydrophobic nature, and passivation effect, rGO could reduce the number of ligands on the surface and offer protection against air and moisture. The nanocrystal (NC)/rGO heterostructures exhibited a proper e.g., of 1.74 eV and a preeminent photoluminescence (PL) intensity and a PLQY of 10.7%.…”

Section: Additive Engineerings At Perovskite/htl Interfacesmentioning

confidence: 99%

Additive Engineering Toward High‐Performance CsPbI₃Perovskite Solar Cells

Guo

Liu

et al. 2020

Solar RRL

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All‐inorganic perovskite solar cells (PSCs) have attracted a lot of attention in the past few years because of their preeminent thermal stability compared with organic–inorganic hybrid PSCs. Among all kinds of all‐inorganic perovskites, CsPbI3 perovskite with a proper bandgap of ≈1.7 eV becomes the most competitive candidate. However, its poor phase stability, hydrophobicity, and high‐density defects have limited the development of CsPbI3 PSCs. To overcome these obstacles for achieving high‐performance CsPbI3 PSCs, additive engineering has been widely used, which has rapidly promoted the power conversion efficiency (PCE) to over 19%. Herein, the progress of additive engineering in CsPbI3 PSCs is systematically reviewed. First, the roles of additives in CsPbI3 PSCs are introduced, including improving phase stability, increasing moisture resistance, and passivating defects. Then, the additive engineering is categorized (additive engineering in perovskites and at perovskite/hole transport layer interfaces) and reviewed in detail. Finally, future research directions on additive engineering are suggested for further enhancing stability and improving PCE.

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In situ growth of α-CsPbI₃ perovskite nanocrystals on the surface of reduced graphene oxide with enhanced stability and carrier transport quality

Abstract: An in situ solution growth method to prepare preferentially assembled and well-distributed α-CsPbI3 nanocrystals/reduced graphene oxide heterostructures is presented.

Cited by 33 publications

References 52 publications

In Situ Growth of MAPbBr₃ Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

In Situ Growth of MAPbBr₃ Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

Hot-Casting Large-Grain Perovskite Film for Efficient Solar Cells: Film Formation and Device Performance

Additive Engineering Toward High‐Performance CsPbI₃Perovskite Solar Cells

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In situ growth of α-CsPbI3 perovskite nanocrystals on the surface of reduced graphene oxide with enhanced stability and carrier transport quality

Abstract: An in situ solution growth method to prepare preferentially assembled and well-distributed α-CsPbI3 nanocrystals/reduced graphene oxide heterostructures is presented.

Cited by 33 publications

References 52 publications

In Situ Growth of MAPbBr3 Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

In Situ Growth of MAPbBr3 Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

Hot-Casting Large-Grain Perovskite Film for Efficient Solar Cells: Film Formation and Device Performance

Additive Engineering Toward High‐Performance CsPbI3Perovskite Solar Cells

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Product

Resources

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In situ growth of α-CsPbI₃ perovskite nanocrystals on the surface of reduced graphene oxide with enhanced stability and carrier transport quality

In Situ Growth of MAPbBr₃ Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

In Situ Growth of MAPbBr₃ Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

Additive Engineering Toward High‐Performance CsPbI₃Perovskite Solar Cells