Scale-up synthesis of high-quality solid-state-processed CsCuX (X = Cl, Br, I) perovskite nanocrystal materials toward near-ultraviolet flexible electronic properties

Zhi, Junge; Liu, Hezhuang; Zou, Jihua; Huang, Yixuan; Xu, Zhaoquan; Pustovyi, Denys; Vitusevich, S. А.

doi:10.1039/d2ra07100b

Cited by 7 publications

(4 citation statements)

References 36 publications

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“…This facile approach is easily applicable to other materials and should help to rapidly identify and optimize novel materials with higher potential for renewable energy generation and efficient energy usage. [13] e) HR-STEM image and f) HR-TEM image of the nanocrystals with corresponding electron diffraction.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Cs3Cu2I5 Nanocrystals in a Continuous Flow System

Arslanova,

Ganswindt,

Lorenzen

et al. 2024

Preprint

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Achieving the goal of generating all of the world’s energy via renewable sources and significantly reducing our energy usage will require the development of novel abundant, nontoxic energy conversion materials. Here, we develop a cost-efficient and scalable continuous flow synthesis of Cs3Cu2I5 nanocrystals as a basis for the rapid advancement of novel nanomaterials. Ideal precursor solutions were obtained through a novel batch synthesis, whose product served as a benchmark for the subsequent flow synthesis. Realizing this setup enabled a reproducible fabrication of Cs3Cu2I5 nanocrystals. We determined the effect of volumetric flow rate and temperature on the final product’s morphology and optical properties, obtaining 21% quantum yield with the optimal configuration. Consequently, we can tune the size and morphology of the nanocrystals with far more precision and in a much wider range than previously achievable. The flow setup is easily applicable to other relevant nanomaterials. It should enable a rapid determination of a material’s potential and subsequently optimize its desired properties for renewable energy generation or efficient optoelectronics.

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Section: Introductionmentioning

confidence: 99%

“…c) Simplified depiction of the 0D crystal structure of Cs 3 Cu 2 I 5 . d) Powder X-ray diffractogram showing sample diffraction in green and theoretical reference in blue [13]. e) HR-STEM image and f) HR-TEM image of the nanocrystals with corresponding electron diffraction.…”

mentioning

confidence: 99%

Synthesis of Cs3Cu2I5 Nanocrystals in a Continuous Flow System

Arslanova,

Ganswindt,

Lorenzen

et al. 2024

Preprint

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“…[28] This halide interchangeability also exists in TCH materials. In the case of Cs 3 Cu 2 X 5 , the gradual exchange of the halide from I to Br induces a slight red-shift in the PL wavelength maximum (from 444 to 456 nm) [27,29] and also increases the PL lifetime notably (from 1 μs in the case of I, to 22 μs in the case of Br). [30] The effect of the bromide content on the quantum yield (QY) of mixed-halide variants is more convoluted, as the determined QY values for mixed compositions always lies closer to the values of pure Cs 3 Cu 2 Br 5 samples.…”

Section: Introductionmentioning

confidence: 99%

“…[ 16,33 ] In most cases, film preparation from mixed‐halide layers is performed by pre‐synthesis of the powders or nanocrystals, which is followed by a layer formation step. [ 29 ] Immediate film formation strategies, such as single‐source vacuum deposition [ 31 ] or spray coating [ 14 ] have been rarely used.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Halide Composition on the Luminescent Properties of Ternary Cesium–Copper Halide Pseudo‐Perovskite Films

Samu

Zsigmond

Hajdu

et al. 2023

Advanced Optical Materials

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Ternary copper halide pseudo‐perovskites are in the forefront of research as potential active materials in light emission applications. The optoelectronic properties of these compounds can be fine‐tuned by the preparation of mixed‐halide compositions. After irradiation, self‐trapped excitonic states are formed in these materials. However, the emission from these self‐trapped states is not yet fully understood. In this work, mixed‐halide Cs3Cu2X5 films (where X: I and/or Br) are prepared by a simple spray‐coating method. Using ultraviolet photoelectron spectroscopy, the changes in optoelectronic properties are linked to the electronic structure of these materials. It is revealed that the incorporation of bromide into the lattice makes the emission process of these materials more vulnerable to trap states. By combining the different spectroscopic characterization techniques, the exact band structure of these compounds is determined, and the different processes are translated to the absolute energy scale. As an alternative excitation mechanism of self‐trapped states, α‐particles are used to induce radioluminescence response. The Cs3Cu2X5 films exhibit composite decay patterns, most likely attributed to a multitude of different trap state‐mediated recombination processes.

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Advances in Paper‐Based Photodetectors: Fabrications, Performances, and Applications

Tang,

Yang,

Duan

et al. 2024

Advanced Optical Materials

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With the development of wearable electronic technology, the flexible photodetectors have attracted widespread attention, and it is of great significance to develop flexible, eco‐friendly and low‐cost photodetectors. Cellulose paper, as a flexible, eco‐friendly, low‐cost, lightweight, customizable, biodegradable and renewable material, has received enthusiastic attention and rapid development in the field of photodetectors in recent years. In this review, it is focused on the research progress of paper‐based (PB) photodetectors. First, the fabrication methods of PB photodetectors are discussed, including electrode materials and optoelectronic functional materials. Then, this review systematically summarizes and analyzes the achievements of PB photodetectors on photoelectric performances (spectral response range, responsivity, detectivity, response/recovery times and on/off ratio) and flexibility characteristics (bending angle and bending cycle). In terms of key performance indicators, the PB photodetectors reported so far can detect multiple wavelengths of light from UV to near‐infrared with the maximum detectivity of 1013 Jones. In addition, the various applications of PB photodetectors is reviewed and discussed. Finally, it is look forward to the future development of PB photodetectors in terms of fabrication methods, photoelectric and flexible performances, and applications. With this review, it is hope that it will promoted the future development of PB photodetectors.

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Scale-up synthesis of high-quality solid-state-processed CsCuX (X = Cl, Br, I) perovskite nanocrystal materials toward near-ultraviolet flexible electronic properties

Abstract: The designed flexible lead-free Cs3Cu2X5 (X = Cl, Br, I) nanocrystal perovskite photodetectors demonstrate excellent properties, including high photoresponses, strong photoselectivity and bending stability at different irradiation wavelengths.

Cited by 7 publications

References 36 publications

Synthesis of Cs3Cu2I5 Nanocrystals in a Continuous Flow System

Synthesis of Cs3Cu2I5 Nanocrystals in a Continuous Flow System

The Effect of Halide Composition on the Luminescent Properties of Ternary Cesium–Copper Halide Pseudo‐Perovskite Films

Advances in Paper‐Based Photodetectors: Fabrications, Performances, and Applications

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