Perovskite photodetectors prepared by flash evaporation printing

Wei, Haoming; Ma, He; Tai, Meiqian; Wei, Yang; Li, Dongqi; Zhao, Xinglei; Lin, Hong; Fan, Shanhui; Jiang, Kaili

doi:10.1039/c7ra04061j

Cited by 8 publications

(7 citation statements)

References 36 publications

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“…This is a comparable value to the detectivity of 6.14 × 10 11 Jones for the device with the spin-coated film. These device performance parameters are comparable to the previously reported MAPbI 3 -based photodetectors 31 , 56 – 58 and commercial Si photodetectors (< 0.2 A/W) 47 , 59 . Figure 6 b displays repeated on/off operation of the photodetector with the flash evaporated MAPbI 3 film.…”

Section: Resultssupporting

confidence: 88%

“…In addition, the high purity of the flash evaporated film is indicated by the absence of diffraction peaks that correspond to PbI 2 (asterisk marks (12.6°)). Note that this is an interesting observation because many previous studies 31 , 38 , 40 , 41 have demonstrated that the addition of excess MAI was necessary to deposit pure MAPbI 3 films without PbI 2 impurities (detailed discussion could be found in the Supplementary Information Sect. 1).…”

Section: Resultsmentioning

confidence: 74%

“…The exact amount of single crystal powder was loaded on the tungsten boat which is located inside of vacuum chamber. The source-to-substrate distance was designed to be 30 cm which is the longest distance among source-to-substrate distances of flash evaporation reported so far 20 , 31 , 38 , 40 , 41 . This is so that we could achieve a uniform deposition of MAPbI 3 over a large area at the substrate end.…”

Section: Resultsmentioning

confidence: 99%

“…The evaporation method, on the other hand, has a potential for uniform large-area film deposition 28 , 29 , conformal film deposition on uneven surfaces 30 , as well as a simple patterning with shadow masks 31 . Additionally, since it is a solvent-free process, there is no need to consider surface tension or solubility of the underlying layer.…”

Section: Introductionmentioning

confidence: 99%

“…Flash evaporation method has gained attention as a candidate for evaporating two or more precursors from a single thermal source by rapidly raising the temperature in a very short time 20 , 30 , 31 , 38 – 41 . In principle, the rapid vaporization of the precursors induces complete and uniform evaporation of the precursors, while maintaining the same ratio between the different components in OHP.…”

Section: Introductionmentioning

confidence: 99%

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Controllable deposition of organic metal halide perovskite films with wafer-scale uniformity by single source flash evaporation

Lee

et al. 2020

Sci Rep

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Conventional solution-processing techniques such as the spin-coating method have been used successfully to reveal excellent properties of organic–inorganic halide perovskites (OHPs) for optoelectronic devices such as solar cell and light-emitting diode, but it is essential to explore other deposition techniques compatible with large-scale production. Single-source flash evaporation technique, in which a single source of materials of interest is rapidly heated to be deposited in a few seconds, is one of the candidate techniques for large-scale thin film deposition of OHPs. In this work, we investigated the reliability and controllability of the single-source flash evaporation technique for methylammonium lead iodide (MAPbI3) perovskite. In-depth statistical analysis was employed to demonstrate that the MAPbI3 films prepared via the flash evaporation have an ultrasmooth surface and uniform thickness throughout the 4-inch wafer scale. We also show that the thickness and grain size of the MAPbI3 film can be controlled by adjusting the amount of the source and number of deposition steps. Finally, the excellent large-area uniformity of the physical properties of the deposited thin films can be transferred to the uniformity in the device performance of MAPbI3 photodetectors prepared by flash evaporation which exhibited the responsivity of 0.2 A/W and detectivity of 3.82 × 1011 Jones.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Controllable deposition of organic metal halide perovskite films with wafer-scale uniformity by single source flash evaporation

Lee

et al. 2020

Sci Rep

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Tailored Design‐of‐Experiments Approach for Device Performance Prediction and Optimization of Flash‐Evaporated Organic–Inorganic Halide Perovskite‐Based Photodetectors

Lee

et al. 2021

Adv Materials Technologies

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Single‐source flash evaporation method has recently gained attention for its potential as a rapid and solvent‐free deposition method for producing organic–inorganic halide perovskite (OHP) films in large‐scale. However, due to a complex nature of the different experimental parameters involved in the deposition process, it is not straightforward to obtain the optimal condition for producing high‐quality OHP films. In this study, this problem is tackled by employing the design‐of‐experiment (DoE) process, which is an efficient statistical analysis for finding an optimized condition with a minimized number of experiments. The DoE process is used for optimizing the responsivity of the OHP photodetector devices against the input variables used in the deposition that yielded an enhanced responsivity of 112.2 mA W−1, which is up to an order of magnitude higher than that of the unoptimized devices. The experimental results using the DoE method provide not only the conditions required for enhancing the device performance but also the guidelines for improving the overall film quality through exploring the variable space of the flash evaporation technique.

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Review on flexible perovskite photodetector: processing and applications

et al. 2023

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Next-generation optoelectronics should possess lightweight and flexible characteristics, thus conforming to various types of surfaces or human skins for portable and wearable applications. Flexible photodetectors as fundamental devices have been receiving increasing attention owing to their potential applications in artificial intelligence, aerospace industry, and wise information technology of 120, among which perovskite is a promising candidate as the light-harvesting material for its outstanding optical and electrical properties, remarkable mechanical flexibility, low-cost and low-temperature processing methods. To date, most of the reports have demonstrated the fabrication methods of the perovskite materials, materials engineering, applications in solar cells, light-emitting diodes, lasers, and photodetectors, strategies for device performance enhancement, few can be seen with a focus on the processing strategies of perovskite-based flexible photodetectors, which we will give a comprehensive summary, herein. To begin with, a brief introduction to the fabrication methods of perovskite (solution and vapor-based methods), device configurations (photovoltaic, photoconductor, and phototransistor), and performance parameters of the perovskite-based photodetectors are first arranged. Emphatically, processing strategies for photodetectors are presented following, including flexible substrates (i.e., polymer, carbon cloth, fiber, paper, etc.), soft electrodes (i.e., metal-based conductive networks, carbon-based conductive materials, and two-dimensional (2D) conductive materials, etc.), conformal encapsulation (single-layer and multilayer stacked encapsulation), low-dimensional perovskites (0D, 1D, and 2D nanostructures), and elaborate device structures. Typical applications of perovskite-based flexible photodetectors such as optical communication, image sensing, and health monitoring are further exhibited to learn the flexible photodetectors on a deeper level. Challenges and future research directions of perovskite-based flexible photodetectors are proposed in the end. The purpose of this review is not only to shed light on the basic design principle of flexible photodetectors, but also to serve as the roadmap for further developments of flexible photodetectors and exploring their applications in the fields of industrial manufacturing, human life, and health care.

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Perovskite photodetectors prepared by flash evaporation printing

Abstract: A flash evaporation printing methodology based on CNT films has been employed to fabricate perovskite photodetectors with high quality.

Cited by 8 publications

References 36 publications

Controllable deposition of organic metal halide perovskite films with wafer-scale uniformity by single source flash evaporation

Controllable deposition of organic metal halide perovskite films with wafer-scale uniformity by single source flash evaporation

Tailored Design‐of‐Experiments Approach for Device Performance Prediction and Optimization of Flash‐Evaporated Organic–Inorganic Halide Perovskite‐Based Photodetectors

Review on flexible perovskite photodetector: processing and applications

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