Nanostructuring methylammonium lead iodide perovskite by ultrafast nano imprinting lithography

Cefarin, Nicola; Cian, Alessandro; Sonato, Agnese; Sovernigo, Enrico; Suran, Fabio; Teklu, Zekarias; Zanut, Alessandra; Pozzato, Alessandro; Tormen, Massimo

doi:10.1016/j.mee.2017.02.023

Cited by 15 publications

(13 citation statements)

References 17 publications

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“…In addition to the silicon and PDMS molds, other molds, such as AAO templates, photolithography patterns assisted by photoresists, and a combination of rigid pillars with photoresists, have been investigated to fabricate patterned lead halide perovskite crystals. − For example, Gu et al used AAO templates to fabricate 3D lead halide perovskite crystals by the so-called vapor–solid–solid reaction process, as shown in Figure a . The lead nanoclusters at the bottom of the AAO nanochannels were utilized as nucleation sites to initiate high-quality CH 3 NH 3 PbI 3 nanowire growth.…”

Section: Other Molds Used For the Fabrication Of Lead Halide Perovski...mentioning

confidence: 99%

“…In addition to AAO templates, photolithography has also developed into a mature technology for the synthesis of patterned perovskite single crystals. − For example, a microstructured photoresist prepared by photolithography has been used as a template in fabricating a patterned crystal film and has demonstrated a good kind of lasing action. A high- Q resonance can be found at around 541 nm, and the field pattern in the x – y plane showed that the field distribution was a TE mode in the z direction .…”

Section: Other Molds Used For the Fabrication Of Lead Halide Perovski...mentioning

confidence: 99%

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Patterned Lead Halide Perovskite Crystals Fabricated by Microstructured Templates

Liu

Zhou

Chen

2020

Crystal Growth & Design

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Lead halide perovskite crystals have been widely used in solar cells, lasers, organic light-emitting diodes, piezoelectric sensors, etc. due to their high carrier mobility, large light absorption coefficients, and long carrier diffusion lengths. So far, much effort has been devoted to the fabrication of lead halide perovskite crystals by means of a solution process and physical methods. In some application domains, the lead halide perovskite crystals, as lasers or devices, for example, require a regular micropatterned structure in order to achieve arrays with almost identical optical or electronic modes. Concomitantly, patterned structures can further optimize the properties of perovskite crystals in their related optoeletronic devices. Therefore, how to fabricate micropatterned lead halide perovskite crystal is one of the hottest research topics in the past few years. Among various kinds of strategies, a combination of templates and wetting discrepancy has been demonstrated to be a simple but robust method, to obtain perovskite crystals with regular arrays and excellent properties. The common selected template materials are silicon, polydimethylsiloxane (PDMS), anodized aluminum oxide (AAO), and photoresist. This review provides insight into the fabrication of patterned lead halide perovskite crystals by using templates composed by the materials stated above and intelligently controlling wetting discrepancy. More importantly, we briefly discuss the key factors and challenges during the pattern process. Finally, the relationship among these templates is discussed, which will shed light on the low-cost fabrication of stable, high-quality perovskite crystals for new applications.

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Section: Other Molds Used For the Fabrication Of Lead Halide Perovski...mentioning

confidence: 99%

Section: Other Molds Used For the Fabrication Of Lead Halide Perovski...mentioning

confidence: 99%

Patterned Lead Halide Perovskite Crystals Fabricated by Microstructured Templates

Liu

Zhou

Chen

2020

Crystal Growth & Design

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“…The hybrid organic–inorganic halide perovskite CH 3 NH 3 PbI 3 (MAPbI) with an ABX 3 architecture has recently been demonstrated as a successful optical and optoelectronic material owing to its tunable direct band gap, long carrier lifetimes, high carrier mobilities, and diffusion lengths. − In addition, the low cost and facile fabrication of MAPbI thin films in solution form are advantageous in terms of their large-scale industrial preparation. , The nanopatterning of perovskite thin films has been shown to improve the efficiency of solar cells through reduced surface reflectance, tailored light trapping, and higher external radiative efficiency and directionality. − Researchers have demonstrated different techniques for the fabrication of perovskite metasurfaces ranging from etching of the substrate and subsequent conformal coating to direct patterning using focused ion beam milling. − Soft polymer-based imprinting techniques are appropriate for halide perovskites due to their sensitivity to water and plasma processing present in conventional lithography and etching processes. This goal was achieved by employing nanoimprint lithography using an inflexible stamp (silicon, Si) as well as using more flexible polydimethylsiloxane (PDMS) stamps. − Unlike an inflexible Si stamp, PDMS can imprint its textures conformally over nonuniform surfaces and defects . The process also proves to be cost-effective as multiple PDMS stamps could be recycled from a single master.…”

Section: Introductionmentioning

confidence: 99%

Thermal Transport in Engineered Hybrid Organic–Inorganic Perovskite Metasurfaces

et al. 2021

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Halide perovskites have recently gained widespread attention for their exceptional optoelectronic properties, which have been illuminated by extensive spectroscopic investigations. In this study, nanophotonic surface engineering using a newly developed soft lithographic technique has been used to reproduce nanostructures with enhanced optical functionalities. The thermal sensitivity of the metasurfaces is first observed in the temperature-dependent photoluminescence (PL) spectra. In order to observe the local changes in heat transport induced by nanopatterning of the perovskite thin films, a noninvasive optical technique based on Raman spectroscopy is employed. The thermophysical properties of the engineered perovskite surfaces are extracted from the softening of the representative peak positions in the Raman spectra, which act as temperature markers. The investigation suggests a comparatively higher rise in the local temperature for the patterned thin films as compared to the pristine thin films. We characterize different imprint geometries on perovskite thin films in terms of both optical and thermal transport simultaneously and report for the first time the existence of a window of thermal tolerance for the metasurfaces within which optical efficiencies can still be maximized.

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“…To this end, in our previous work, we have used nanoimprint lithography to pattern spin-coated perovskite films through heated and pressurized contact with inflexible stamp. [8] On the other hand, Mao et al [9] fabricated a directly patterned nanostructure of MHP deposited from solution using flexible polydimethylsiloxane (PDMS) stamps. Unlike a silicon stamp, the PDMS can imprint its textures conformally on non-uniform surfaces and over defects.…”

Section: Introductionmentioning

confidence: 99%

Controlling Metal Halide Perovskite Crystal Growth via Microcontact Printed Hydrophobic‐Hydrophilic Templates

Gebremichael

Alam

Cefarin

et al. 2021

Crystal Research and Technology

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Herein, a simple, low-cost, solution-processed, and parallel fabrication method to form metal halide perovskite (MHP) poly and single-crystalline films confined in ordered micrometer-sized domains is reported. A cross-linked polydimethylsiloxane (PDMS) stamp featuring 25 µm side squares is used to pattern their substrates. The substrate is microcontact printed on the PDMS inked with self-assembled monolayers (SAMs) of alkanethiol to form a molecular template, resulting in hydrophilic (gold) and hydrophobic (alkanethiol) domains. The subsequent deposition of lead bromide (PbBr 2 ) and methylammonium bromide (MABr) precursor solutions on the pre-patterned substrate resulted in poly and single-crystalline films of methylammonium lead bromide (MAPbBr 3 ) confined to the hydrophilic domains. Two deposition methods: drop-casting and two-step spin-coating are systematically investigated to find well confined and large-sized single-crystal MAPbBr 3 . Casting proves to be more effective than two-step spin-coating to achieve better confinement of MAPbBr 3 . The patterning process is monitored in dependence of the a) deposition methods used to b) precisely control the MAPbBr 3 crystal growth in a pre-defined site which leads to c) grow poly and single-crystals in a periodic arrangement. Their nondestructive and less energy processable fabrication method will have its own contribution in transferring patterns to desired substrates that enables them to fabricate different types of MHP optoelectronic devices and integrated electronic systems with more complex architectures.

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Nanostructuring methylammonium lead iodide perovskite by ultrafast nano imprinting lithography

Cited by 15 publications

References 17 publications

Patterned Lead Halide Perovskite Crystals Fabricated by Microstructured Templates

Patterned Lead Halide Perovskite Crystals Fabricated by Microstructured Templates

Thermal Transport in Engineered Hybrid Organic–Inorganic Perovskite Metasurfaces

Controlling Metal Halide Perovskite Crystal Growth via Microcontact Printed Hydrophobic‐Hydrophilic Templates

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