The Challenge of Ambient Air–Processed Organometallic Halide Perovskite: Technology Transfer From Spin Coating to Meniscus Blade Coating of Perovskite Thin Films

Fong, W.K.; Li, Gang

doi:10.3389/fmats.2021.635224

Cited by 14 publications

(6 citation statements)

References 77 publications

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“…Blade coating depends heavily on the temperature of the substrate, the speed at which the coating is applied, and the concentration of the precursors [115]. Moisture in the air posed the greatest processing difficulty [116]. By maintaining the correct substrate temperature, Wang et al [117] were able to guarantee the perovskite phase transition, and dimethyl sulfoxide (DMSO) in the precursor solution slowed down the perovskite crystallisation process.…”

Section: Doctor Bladingmentioning

confidence: 99%

Processing methods towards scalable fabrication of perovskite solar cells: A brief review.

Kumar,

tripathi,

Shkir

et al. 2024

Preprint

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Recent rapid growth in perovskite solar cells (PSCs) has sparked research attention due to their photovoltaic efficacy, which exceeds 25% for small-area PSCs. The perovskite film’s optical and electrical properties, including as light absorption, carrier diffusion length, and charge transport, are directly controlled by its shape. Therefore, this review begins with the structure of perovskite solar cells and highlights the latest film production technologies and how film morphology affects performance. To commercialize PSCs and enhance scalability, several technologies have been devised to make high-quality perovskite films. Spin coating, chemical vapor deposition, blade-coating, spray coating, flexographic printing, screen printing, and inkjet printing have been shown to manage film formation and improve power conversion efficiency (PCE) by over 21%. Large-scale production is feasible with chemical vapour deposition and thermal vapour deposition despite their complex technological requirements and high reproducibility of processing and manufacturing. We concluded by reviewing perovskite solar cell fabrication methods and commercialization prospects. To commercialize perovskite solar cells, existing fabrication technologies need to be refined and more studies should be done.

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Section: Doctor Bladingmentioning

confidence: 99%

Processing methods towards scalable fabrication of perovskite solar cells: A brief review.

Kumar,

tripathi,

Shkir

et al. 2024

Preprint

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“…The emerging organic-inorganic hybrid perovskite solar cells (PVSCs) have reached a world-record power conversion efficiency (PCE) of 25.7% over the past decade, proving their great potential as a promising candidate for photovoltaic (PV) applications [1]. Since the efficiency of small-size PVSCs is approaching their theoretical limit [2], the research focus is gradually shifting to upscaling perovskite PV technology with continuous deposition methods such as blade-coating and slot-die coating, where the intractable problem is controlling the crystallization and growth of large-size perovskite films [3][4][5][6][7]. Different strategies such as solvent engineering and additive engineering have been employed to control perovskite crystallization and growth during scalable coating processes for achieving improved device efficiency and reproducibility [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Self-assembled monolayer enabling improved buried interfaces in blade-coated perovskite solar cells for high efficiency and stability

et al. 2022

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Despite the rapidly increased power conversion efficiency (PCE) of perovskite solar cells (PVSCs), it is still quite challenging to bring such promising photovoltaic technology to commercialization. One of the challenges is the upscaling from small-sized lab devices to large-scale modules or panels for production. Currently, most of the efficient inverted PVSCs are fabricated on top of poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), which is a commonly used hole-transporting material, using spin-coating method to be incompatible with large-scale film deposition. Therefore, it is important to develop proper coating methods such as blade-coating or slot-die coating that can be compatible for producing large-area, high-quality perovskite thin films. It is found that due to the poor wettability of PTAA, the blade-coated perovskite films on PTAA surface are often inhomogeneous with large number of voids at the buried interface of the perovskite layer. To solve this problem, self-assembled monolayer (SAM)-based hole-extraction layer (HEL) with tunable headgroups on top of the SAM can be modified to provide better wettability and facilitate better interactions with the perovskite coated on top to passivate the interfacial defects. The more hydrophilic SAM surface can also facilitate the nucleation and growth of perovskite films fabricated by blade-coating methods, forming a compact and uniform buried interface. In addition, the SAM molecules can also be modified so their highest occupied molecular orbital (HOMO) levels can have a better energy alignment with the valence band maxima (VBM) of perovskite. Benefitted by the high-quality buried interface of perovskite on SAM-based substrate, the champion device shows a PCE of 18.47% and 14.64% for the devices with active areas of 0.105 cm 2 and 1.008 cm 2 , respectively. In addition, the SAM-based device exhibits decent stability, which can maintain 90% of its initial efficiency after continuous operation for over 500 h at 40 °C in inert atmosphere. Moreover, the SAM-based perovskite mini-module exhibits a PCE of 14.13% with an aperture area of 18.0 cm 2 . This work demonstrates the great potential of using SAMs as efficient HELs for upscaling PVSCs and producing high-quality buried interface for large-area perovskite films.

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“…Different deposition techniques such as ink-jet printing (Xie, 2018), co-evaporation (Park, 2019), and spin coating (Fong, 2021) have been used to form perovskite thin films.…”

Section: Introductionmentioning

confidence: 99%

The Structural and Optical Properties of Perovskite Thin Films

Güneri

Özpozan

2023

European Journal of Formal Sciences and Engineering

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Perovskite materials have many interesting properties such as modulation of the optical band gap and the properties of quantum wells. In addition, they have a stable structure. For these reasons, perovskites have attractive properties for optoelectronic devices. Additionally, the structural and optical properties can be changed by means of different halide atoms doped into materials. In this study, the effect of iodine on the structural, and optical properties of perovskite thin films was investigated. KCaCl2 I and KCaCl3 perovskite were prepared by chemical bath deposition on a glass substrate. The crystal structures of the films were determined by X-ray diffraction. X-Ray Diffraction (XRD) analysis revealed that the films had a crystalline structure. In addition, KCaCl2 I perovskite thin film has better crystalline than KCaCl3 perovskite thin films. Linear optical parameters were determined using transmittance and absorbance measurements. And then, the optical band gap values, extinction coefficient, refractive index, and dielectric constants were determined as linear optical properties. It was understood that these properties were affected by iodine.

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The Challenge of Ambient Air–Processed Organometallic Halide Perovskite: Technology Transfer From Spin Coating to Meniscus Blade Coating of Perovskite Thin Films

Cited by 14 publications

References 77 publications

Processing methods towards scalable fabrication of perovskite solar cells: A brief review.

Processing methods towards scalable fabrication of perovskite solar cells: A brief review.

Self-assembled monolayer enabling improved buried interfaces in blade-coated perovskite solar cells for high efficiency and stability

The Structural and Optical Properties of Perovskite Thin Films

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