Single-crystalline perovskite wafers with a Cr blocking layer for broad and stable light detection in a harsh environment

Wang, Qian; Bai, Dongliang; Jin, Zhiwen; Liu, Shengzhong

doi:10.1039/c8ra02709a

Cited by 10 publications

(13 citation statements)

References 57 publications

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“…However, the overly large thickness of the wafers still hinders their further application in vertically structured solar cells and photodetectors. Most recently, based on the same method, much thinner single‐crystal MAPbI 3 wafers, with 35 µm thickness, have been obtained …”

Section: Fabrication Methods For Perovskite Single‐crystal Thin Filmsmentioning

confidence: 99%

Recent Advances in Halide Perovskite Single‐Crystal Thin Films: Fabrication Methods and Optoelectronic Applications

et al. 2019

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Metal‐halide perovskites have aroused intense interest in the scientific community by virtue of their numerous remarkable optoelectronic properties, which render them promising candidates for applications in various optoelectronic fields, such as solar cells, light‐emitting diodes, photodetectors, and lasers. Compared with perovskite polycrystalline films and nanocrystals, grain‐boundary‐free single‐crystal perovskites possess lower trap‐state densities, higher carrier mobilities, and longer diffusion lengths, which are supposed to deliver superior optoelectronic performance. However, the thickness (a few millimeters) of typical bulk single‐crystal perovskites are much greater than their carrier diffusion length (e.g., MAPbI3 SC, ≈175 µm), which results in severe charge accumulation and significantly hinders their development. To this end, fabricating single‐crystal thin films is of great importance for further exploring the potential of single‐crystal perovskites in various applications. In this paper, the rapid and prosperous developments in the fabrication methods of perovskite single‐crystal thin films are systematically summarized and recent encouraging progress in their physical and chemical properties as well as the optoelectronic applications (solar cells, photodetectors, and light‐emitting diodes) of single‐crystal thin films are reviewed. Finally, the challenges and a brief outlook for further improving the quality of perovskite single‐crystal thin films and optimizing the device design are highlighted.

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Section: Fabrication Methods For Perovskite Single‐crystal Thin Filmsmentioning

confidence: 99%

Recent Advances in Halide Perovskite Single‐Crystal Thin Films: Fabrication Methods and Optoelectronic Applications

et al. 2019

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“…3f). 38 Realizing the advantage to grow the perovskite single crystals directly on the substrate, Chen designed a novel setup by clamping the two substrates together by a binder clip and vertically immersing in to the solution ( Fig. 3g).…”

Section: Inverse Temperature Crystallization Methodsmentioning

confidence: 99%

“…Syntheses of bulk SCPs: (a) schematic diagram of the top-seeded solution growth of a large MAPbI 3 single-crystal (redrawn from ref , copyright 2016, Royal Society of Chemistry); (b) schematic illustration of the bottom seeded crystal growth method (redrawn from refs (copyright 2015, The Royal Society of Chemistry) and (copyright 2015, Nature Publishing Group); (c) schematic representation of the ITC apparatus, showing the crystallization that occurs in a vial immersed in a heating bath, where the solution is heated from room temperature and kept at an elevated temperature (80 °C for MAPbBr 3 and 110 °C for MAPbI 3 ) to initiate crystallization (redrawn from ref , copyright 2015, Nature Publishing Group); (d) MAPbBr 3 crystal growth at different time intervals (reprinted with permission from ref , copyright 2015, Nature Publishing Group); (e) schematic representation of ITC apparatus using the peristaltic pump (reprinted with permission from ref , copyright 2016, Wiley); (f) schematic depicts the modified setup of ITC apparatus with the peristaltic pump (reprinted with permission from ref , copyright 2018, Royal Society of Chemistry); (g) schematic represents the space-confined growth strategy of hybrid perovskite single-crystal thin films (reprinted with permission from ref , copyright 2016, American Chemical Society); (h) schematic illustrates the single-crystal growth mechanism through the PTFE frame stacking technique (reprinted with permission from ref , copyright 2015, Nature Publishing Group).…”

Section: Growth Methods Of Perovskite Single Crystalsmentioning

confidence: 99%

“…To confine the thickness, single crystals were grown between two parallel glass slides, designed in a dynamic flow setup by using a peristaltic pump to grow MAPbI 3 single crystals of lateral sizes up to 1 cm and thicknesses of 150 μm (Figure e) . Recently, a modified setup is also used to grow ultrathin free-standing single crystals 35 μm thick (see Figure f) . Realizing the advantage to grow perovskite single crystals directly on the substrate, Chen designed a novel setup by clamping the two substrates together, using a binder clip, and vertically immersing it into the solution (Figure g) .…”

Section: Growth Methods Of Perovskite Single Crystalsmentioning

confidence: 99%

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Single Crystals: The Next Big Wave of Perovskite Optoelectronics

Murali

Kolli

Yin

et al. 2019

ACS Materials Lett.

102

100

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Contemporary advancements in perovskite semiconductors are visibly impacting the progress of light conversion applications. These alluring photo absorbers have gained wide consideration owing to their simple processing and striking optoelectronic properties. Although polycrystalline perovskite thin films exhibit phenomenal performance in energy harvesting devices, they suffer from severe instabilities arising from morphological disorder and surface degradation under ambient conditions. Recent progress in perovskite single-crystals, which in theory should outperform their polycrystalline thin-film counterparts, has been demonstrated to surmount these challenges due to the exceptional optoelectronic properties, such as low trap density, high mobility, low intrinsic carrier concentration and long carrier diffusion length.However, most of the growth approaches used for single-crystal syntheses produce very thick crystals and 2 | P a g e subsequently, the related optoelectronic applications are very limited. Given the potential of perovskite single crystals, to break a new path for perovskite optoelectronic devices relies on understanding sustainable issues arising from interfacial/integration losses and developing passivation strategies to achieve performance parity in open ambient. Therefore, the current review provides a comprehensive overview of the advantages, limitations, and challenges associated with growth methods of single-crystals and their chemical stability, device configurations, photophysics, charge carrier dynamics and photovoltaic applications. TOC GRAPHICSIn recent years, metal halide perovskites (MHP) have captivated the interest of researchers owing to their engrossing properties and phenomenal performances in numerous optoelectronic devices. In the early 1980s, MAPbX3 (MA = CH3NH3, X = Cl¯, Br¯, I¯) and MASnBrxI3-x-based semiconductors were merely considered to be promising for photovoltaics. 1 Nevertheless, their physical and chemical properties have not been meticulously studied. A turning point in the field occurred in 2009 when Miyasaka first reported a thin film-based solar cell with an efficiency of 3.81% and photovoltage of 0.96 V showing external quantum efficiency (EQE) of 65%. 2 Later, many researchers have contributed for the synthesis and device applications of single-crystal perovskite in solar cells and other optoelectronic applications. 3,4 Moreover, 3 | P a g e single-crystal perovskites (SCPs) are a unique class of materials that have been used as solar radiation absorbers. It should be noted that the MAPbX3 (X = Br ─ , I ─ ) perovskite single crystals possess unprecedented long charge carrier diffusion lengths (10 µm) and a striking low trap density (10 9 to 10 10 cm -3 ). 5 More specifically, under 1 sun illumination, the single-crystals of MAPbI3 achieved diffusion lengths of 175 μm and exceeding 3 mm under weak light for both electrons and holes. [6][7] To achieve an efficient device performance, long-range ordered pattern in a perovskite lattice is desirable to significantly...

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“…The corresponding growth results are exhibited as follows: When the space-confined method was combined with the topseeded solution growth method, the thickness of the resulting CH3NH3PbBr3 (MAPbBr3) crystal film could be adjusted from 13 nm to 4.5 μm [24]; when incorporating the confined space into antisolvent vapor-assisted crystallization, the single-crystal (C6H5C2H4NH3)2PbI4 thin films with the lowest thickness of 1 μm was achieved; the combination of the space-confined method with cooling-induced crystallization method can prepare quasi-two-dimensional (2D) BA2MA2Pb3I10 single crystals with a thickness of 20 μm [25]; for inverse temperature crystallization based on space-confined method, the thickness of resultant single-crystal wafer of MAPbI3 could be controlled to as thin as 35 μm [26]. As illustrated in Fig.…”

Section: Compatibility Of Space-confined Methodsmentioning

confidence: 99%

Space-confined growth of metal halide perovskite crystal films

Liu

Zeng

et al. 2020

Nano Res.

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Metal halide perovskites, as a new generation of optoelectronic materials, have attracted a great deal of interest due to their remarkable intrinsic properties. Due to the excellent optoelectronic properties, the perovskite crystals are widely used in lasers, photodetectors, X-ray detectors and solar cells. Considering the device performance and fabrication requirements, proper thickness of the crystal is required to avoid carrier loss and simultaneously ensure sufficient light absorption, which can realize the full potential of its excellent carrier transport property. Thus, the fabrication of perovskite crystal in a thin film with an adjustable thickness is highly desirable. The space-confined method has been demonstrated to be an effective way of preparing perovskite with controlled thickness. In this method, the thickness of perovskite can be regulated flexibly in a geometric confined space. Moreover, the size, quality and architecture of perovskite crystal films are also major concerns for practical photoelectric devices, which can also be optimized by the space-confined method owing to its good adaptability towards various modified strategies. In a word, the space-confined method is not only a simple and conventional way to adjust the thickness of perovskite crystal films, but also provides a platform to optimize their size, quality and architecture through applying appropriate strategies to the confined space. Herein, we review the space-confined growth of perovskite crystal films. Particularly, various modified strategies based on the space-confined method applied to the optimization of thickness, size, quality and architecture are highlighted. Then the stability investigating and component regulating of perovskite crystal films would be also mentioned. Furthermore, the correlation between the perovskite thickness and the device performance is discussed. Finally, several key challenges and proposed solutions of perovskite thin films based on the space-confined method are discussed.

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Single-crystalline perovskite wafers with a Cr blocking layer for broad and stable light detection in a harsh environment

Cited by 10 publications

References 57 publications

Recent Advances in Halide Perovskite Single‐Crystal Thin Films: Fabrication Methods and Optoelectronic Applications

Recent Advances in Halide Perovskite Single‐Crystal Thin Films: Fabrication Methods and Optoelectronic Applications

Single Crystals: The Next Big Wave of Perovskite Optoelectronics

Space-confined growth of metal halide perovskite crystal films

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