Photomodification of benzyl germanane with group 6 metal carbonyls

Konečný, Jan; Hartman, Tomáš; Antonatos, Nikolas; Mazánek, Vlastimil; Sofer, Zdeněk; Šturala, Jiří

doi:10.1016/j.flatc.2022.100354

Cited by 5 publications

(6 citation statements)

References 68 publications

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“…These peaks are assigned to unreacted elemental germanium, Ge 0 (1217.2 eV, 23.71%), Ge 2+ from GeI 2 (1219.01 eV, 67.35%), and Ge 4+ arising from GeO 2 due to surface oxidation (1221.2 eV, 8.94%). It must be noted that the Ge 2p region is preferred for analysis over the Ge 3d due to its simplicity. , …”

Section: Resultsmentioning

confidence: 99%

Millimeter-Sized Layered GeI₂ Single Crystals as a Promising Platform for Broadband Photodetectors

Hou

Antonatos

Sarkar

et al. 2023

ACS Appl. Electron. Mater.

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In the modern era, the limitations of conventional semiconductors have prompted the increasing importance of highquality layered materials for high-performance (opto)electronic devices. Herein, we report the synthesis of millimeter-sized GeI 2 single crystals, utilized as a broadband photodetector. The material was grown directly from its elements in a large-scale vapor transport method. The resulting freestanding crystals, with a diameter of up to 5 mm, were characterized through structural and optical measurements. Subsequently, a metal−semiconductor− metal broadband photodetector was fabricated. The as-fabricated device exhibited promising performance in photocurrent measurements when subjected to a 460 nm laser with a power density of 3.8 mW cm −2 , including a high responsivity of 21.1 mA W −1 , a relatively fast photoresponse speed (a rise time of 0.16 s and a decay time of 0.5 s), and a commendable specific detectivity of 5.54 × 10 7 Jones at room temperature.

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Section: Resultsmentioning

confidence: 99%

Millimeter-Sized Layered GeI₂ Single Crystals as a Promising Platform for Broadband Photodetectors

Hou

Antonatos

Sarkar

et al. 2023

ACS Appl. Electron. Mater.

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“…Konecny et al [95] Note: In many works, GeH and GeMe were prepared as reference material(s) but are not listed in the table as the synthesis conditions are similar to the pioneering works. a) Abbreviations listed and used in this review are mainly based on the respective article except for GeCH 3 , which is usually referred as GeMe in this review;…”

Section: Poly(dihydrogermane) -mentioning

confidence: 97%

“…Photochemical Reaction of Metal Carbonyls: An innovative photochemical approach was applied to modify BnGe by metal carbonyls M(CO 6 ) (M = Cr, Mo, W). [95] BnGe was dispersed in anhydrous THF and added with M(CO 6 ) followed by UV irradiation. For Cr(CO) 6 , the irradiation forms a highly reactive intermediate complex, Cr(CO) 5 (THF), which reacts with the benzyl group to form GeCH 2 (C 6 H 5 )Cr(CO) n (n = 1, 2, 3) as illustrated in Figure 4f.…”

Section: Other Topotactical Deintercalation Approaches For Diverse Fu...mentioning

confidence: 99%

Section: Functionalization Of Germananesmentioning

confidence: 99%

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2D Functionalized Germananes: Synthesis and Applications

Pumera

2022

Advanced Materials

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Figure 2. a) Optical microscope image of a CaGe 2 ingot. b) Schematic diagram of the crystal structures of 2H, 3R, 4H, 6RCaGe 2 , and 1HEuGe 2 .The black rectangles outline the hexagonal unit cells. c) HAADF-STEM images of 3R, 4H, and 6RCaGe 2 in the [100] incident directions, with the stimulated pattern shown in the rectangular panel at the corner and the overlay of Ca and Ge elemental mapping of 3RCaGe 2 . a-c) Reproduced with permission. [73] Copyright 2018, Elsevier. d) Scheme of the fluoride diffusion into CaGe 2 , forming CaGe 2 F x (0 < x < 1.8), a compound that contains multilayer germanane. e) Composition of different types of germanene present within CaGe 2 F x (0.2 < x < 1.5). f) HAADF-STEM images of (top) m-, i-, and w-BLGe, and (bottom) i,i-, m,m-, and i,m-TLGe, where m = mirror, i = inversion, w = wavy, BL = bilayer, TL = trilayer. d-f) Reproduced with permission. [87]

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Reaction Mechanism and Performance of Innovative 2D Germanane‐Silicane Alloys: Si_xGe₁₋_xH Electrodes in Lithium‐Ion Batteries

Wei,

Hartman,

Mourdikoudis

et al. 2024

Advanced Science

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The adjustable structures and remarkable physicochemical properties of 2D monoelemental materials, such as silicene and germanene, have attracted significant attention in recent years. They can be transformed into silicane (SiH) and germanane (GeH) through covalent functionalization via hydrogen atom termination. However, synthesizing these materials with a scalable and low‐cost fabrication process to achieve high‐quality 2D SiH and GeH poses challenges. Herein, groundbreaking 2D SiH and GeH materials with varying compositions, specifically Si0.25Ge0.75H, Si0.50Ge0.50H, and Si0.75Ge0.25H, are prepared through a simple and efficient chemical exfoliation of their Zintl phases. These 2D materials offer significant advantages, including their large surface area, high mechanical flexibility, rapid electron mobility, and defect‐rich loose‐layered structures. Among these compositions, the Si0.50Ge0.50H electrode demonstrates the highest discharge capacity, reaching up to 1059 mAh g−1 after 60 cycles at a current density of 75 mA g−1. A comprehensive ex‐situ electrochemical analysis is conducted to investigate the reaction mechanisms of lithiation/delithiation in Si0.50Ge0.50H. Subsequently, an initial assessment of the c‐Li15(SixGe1‐x)4 phase after lithiation and the a‐Si0.50Ge0.50 phase after delithiation is presented. Hence, this study contributes crucial insights into the (de)lithiation reaction mechanisms within germanane‐silicane alloys. Such understanding is pivotal for mastering promising materials that amalgamate the finest properties of silicon and germanium.

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Photomodification of benzyl germanane with group 6 metal carbonyls

Cited by 5 publications

References 68 publications

Millimeter-Sized Layered GeI₂ Single Crystals as a Promising Platform for Broadband Photodetectors

Millimeter-Sized Layered GeI₂ Single Crystals as a Promising Platform for Broadband Photodetectors

2D Functionalized Germananes: Synthesis and Applications

Reaction Mechanism and Performance of Innovative 2D Germanane‐Silicane Alloys: Si_xGe₁₋_xH Electrodes in Lithium‐Ion Batteries

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Photomodification of benzyl germanane with group 6 metal carbonyls

Cited by 5 publications

References 68 publications

Millimeter-Sized Layered GeI2 Single Crystals as a Promising Platform for Broadband Photodetectors

Millimeter-Sized Layered GeI2 Single Crystals as a Promising Platform for Broadband Photodetectors

2D Functionalized Germananes: Synthesis and Applications

Reaction Mechanism and Performance of Innovative 2D Germanane‐Silicane Alloys: SixGe1−xH Electrodes in Lithium‐Ion Batteries

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Millimeter-Sized Layered GeI₂ Single Crystals as a Promising Platform for Broadband Photodetectors

Millimeter-Sized Layered GeI₂ Single Crystals as a Promising Platform for Broadband Photodetectors

Reaction Mechanism and Performance of Innovative 2D Germanane‐Silicane Alloys: Si_xGe₁₋_xH Electrodes in Lithium‐Ion Batteries