A Centrifugal‐Force‐Assisted Wet‐Etching Approach toward Top‐Down Fabrication of Perovskite‐Single‐Crystalline Thin Films

Lv, Qianrui; Zhang, Lijing

doi:10.1002/slct.202003921

Cited by 4 publications

(4 citation statements)

References 22 publications

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Section: Space-confined Methodsmentioning

confidence: 99%

“…[ 55 ] This method was further modified by Lv and Zhang to reduce residues on the crystal surface after the wet etching process. [ 56 ] As schematically illustrated in Figure 4c, the process involved first thinning the bulk MAPbI 3 single crystal to approximately 200 μm‐thick wafers through wire cutting. Subsequently, the crystal wafer was etched with a low‐concertation mother liquor to prevent undesired crystallization on the surface.…”

Section: Large‐scale Single Crystal Synthesis Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Large‐Scale Perovskite Single Crystal Growth and Surface Patterning Technologies

Zhang,

Song,

Zhang

2023

Small Science

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In the past decade, metal halide perovskite polycrystalline films have witnessed significant advancements in the field of high‐performance optoelectronic devices, including photodetectors, solar cells, light‐emitting diodes, and lasers. Perovskite films with periodic micro/nanoarrays have garnered substantial attention due to their capability not only to improve the efficiency of individual devices but also to hold great promise for future commercialization. Surpassing their polycrystalline counterparts, perovskite single crystals typically exhibit longer carrier diffusion lengths, extended carrier lifetimes, and enhanced carrier mobility due to the absence of grain boundaries and reduced defects, positioning them as promising candidates for both fundamental studies and advanced optoelectronic devices. To this end, significant endeavors have been dedicated to the development of diverse methodologies for synthesizing large‐scale perovskite single crystals, including bulk single crystals and single‐crystal thin films. Furthermore, aiming to integrate the distinctive functionality with single crystals, considerable efforts have been directed toward the design of certain patterns on single‐crystal surfaces. Herein, this review presents recent progress in technologies for the preparation of large‐scale single crystals and the approaches to patterning their surfaces, highlights the unique advantages of each method, and presents their promising advances in various optoelectronic applications as well as the potential challenges.

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Section: Space-confined Methodsmentioning

confidence: 99%

Section: Large‐scale Single Crystal Synthesis Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Large‐Scale Perovskite Single Crystal Growth and Surface Patterning Technologies

Zhang,

Song,

Zhang

2023

Small Science

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“…[91] Micro-crystalline precipitation as a consequence of etching was shown to be prevented by placing SC on a rotating stand to spread the etching solution uniformly on the SC wafer while removing rapidly the residual etching solution from the surface. [92] Alternatively, sandpaper was used to thin down MAPI and MAPB bulk crystals grown by ITC, followed by additional lapping with calcined alumina sheets to reduce surface roughness down to 0.3 μm (Figure 7b). [93] The top down approach is a general method for preparing thin films of controllable thickness and orientation, allowing to expose other facets than the (100) typically obtained by the SLG technique.…”

Section: Free-standing Thin Filmsmentioning

confidence: 99%

Monocrystalline Methylammonium Lead Halide Perovskite Materials for Photovoltaics

Capitaine

Sciacca

2021

Advanced Materials

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Lead halide perovskite solar cells have been gaining more and more interest. In only a decade, huge research efforts from interdisciplinary communities enabled enormous scientific advances that rapidly led to energy conversion efficiency near that of record silicon solar cells, at an unprecedented pace. However, while for most materials the best solar cells were achieved with single crystals (SC), for perovskite the best cells have been so far achieved with polycrystalline (PC) thin films, despite the optoelectronic properties of perovskite SC are undoubtedly superior. Here, by taking as example monocrystalline methylammonium lead halide, the authors elaborate the literature from material synthesis and characterization to device fabrication and testing, to provide with plausible explanations for the relatively low efficiency, despite the superior optoelectronics performance. In particular, the authors focus on how solar cell performance is affected by anisotropy, crystal orientation, surface termination, interfaces, and device architecture. It is argued that, to unleash the full potential of monocrystalline perovskite, a holistic approach is needed in the design of next‐generation device architecture. This would unquestionably lead to power conversion efficiency higher than those of PC perovskites and silicon solar cells, with tremendous impact on the swift deployment of renewable energy on a large scale.

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Advances in Perovskite Single Crystal Thin Films: Synthesis Methods and Applications in Photodetection

Wu,

Zhang,

Wang

et al. 2024

Advanced Optical Materials

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Halide perovskites have generated tremendous interest for photodetectors (PDs), mainly because of their unique optoelectronic properties, wide wavelength coverage, and facile fabrication process. Perovskite single crystal thin films (SCTFs) characterized by their grain‐boundary‐free structures and thin thickness are expected to enhance the optoelectronic performance and broaden applications of PDs. In this review, the latest progress in perovskite SCTFs is examined, emphasizing main synthesis technologies, strategies for integrating SCTFs within devices, and applications in photodetection. Besides, the classical synthesis methods for perovskite SCTFs are analyzed in detail elucidating the respective advantages and limitations. Moreover, proper integration of perovskite SCTFs into devices is one of the prerequisites for the potential optoelectronic device fabrication, and three main strategies are discussed thoroughly including the transfer of synthesized single crystals for electrode deposition, in situ growth of SCTFs on the electrode/substrate, as well as in situ growth of SCTFs on the transport layer. Along with interface engineering strategies which energized high‐performance SCTF PDs, the applications for high‐performance SCTF PDs including flexible PDs, PD arrays for imaging, and narrowband photodetection are further analyzed. Finally, the future opportunities of perovskite SCTFs are presented, with the expectation of stimulating new ideas and further advances on designs for superior‐performance PDs.

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A Centrifugal‐Force‐Assisted Wet‐Etching Approach toward Top‐Down Fabrication of Perovskite‐Single‐Crystalline Thin Films

Cited by 4 publications

References 22 publications

Large‐Scale Perovskite Single Crystal Growth and Surface Patterning Technologies

Large‐Scale Perovskite Single Crystal Growth and Surface Patterning Technologies

Monocrystalline Methylammonium Lead Halide Perovskite Materials for Photovoltaics

Advances in Perovskite Single Crystal Thin Films: Synthesis Methods and Applications in Photodetection

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