Rational self-assembly of polygonal organic microcrystals for shape-dependent multi-directional 2D optical waveguides

Xu, Chao-Fei; Yu, Yue; Lv, Qiang; Yan, Changcun; Wang, Xuedong; Liao, Liang‐Sheng

doi:10.1016/j.cclet.2021.10.076

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…In particular, low-dimensional near-infrared (NIR)-emitting materials have attracted more attention due to fundamental physical investigations and advanced device applications in fields of optical communications, , night vision, − biological imaging, , etc. To date, particular effort has been devoted to the development of NIR photonics in the fields of low-dimensional materials, including films, − quantum dots, − and micro/nanocrystals. − Notably, low-dimensional sheet-like crystals play an important role in lasers, − light-emitting devices, , photoelectric conversion, − and optical waveguides. − Sheet-like crystals with NIR luminescence have excellent two-dimensional (2D) optical conduction properties with an ultralow loss coefficient and active optical waveguide properties, which have indispensable practical significance for the optoelectronic integrated application of NIR emission …”

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confidence: 99%

Two-Dimensional Optical Waveguides at Telecom Wavelengths Based on Organic Single-Crystal Microsheets of a Charge Transfer Complex

Liu

et al. 2023

J. Phys. Chem. Lett.

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Organic charge transfer (CT) cocrystals open a new door for the exploitation of low-dimensional near-infrared (NIR) emitters by a convenient self-assembly approach. However, research about the fabrication of sheet-like NIR-emitting microstructures that are significant for structural construction and integrated application is limited by the unidirectional molecular packing mode. Herein, via regulation of the biaxial intermolecular CT interaction, single-crystalline microsheets with remarkable NIR emission from 720 to 960 nm were synthesized via the solution self-assembly process of dithieno[3,2-b:2′,3′-d]thiophene and 7,7,8,8-tetracyanoquinodimethane. The expected sheet-like structure is conducive to achieving a two-dimensional (2D) optical waveguide with an ultralow optical loss rate of 0.250 dB/μm at 860 nm. More significantly, these asprepared organic microsheets with tunable thicknesses (h) from 100 to 1100 nm exhibit thickness-dependent NIR optical transportation performance. These findings could pave the way to a new class of low-dimensional NIR emitters for 2D photonics at telecom wavelengths.

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confidence: 99%

Two-Dimensional Optical Waveguides at Telecom Wavelengths Based on Organic Single-Crystal Microsheets of a Charge Transfer Complex

Liu

et al. 2023

J. Phys. Chem. Lett.

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“…3b, the shapes of o-MSB, m-MSB, and p-MSB microsheets are rectangle, parallelogram, and hexagon, respectively, with the corresponding inner angles of 901, 801, and 1031. 32,55 In addition, it has been reported that the solubility of organic molecules, the choice of different solvents, the assistance of surfactant or template, etc., can affect the crystal nucleation process and then result in different morphologies of the organic micro/nanostructures. 46,53,[56][57][58][59] For example, Prof. Huang and co-workers constructed three microstructures of 9,9 0 -(2,5-dibromo-1,4-phenylene)bis(9H-carbazole) (PDBCz) microsheets via altering the solution concentration (Fig.…”

Section: Aggregation Mode and Crystal Morphologymentioning

confidence: 99%

“…3b, the shapes of o -MSB, m -MSB, and p -MSB microsheets are rectangle, parallelogram, and hexagon, respectively, with the corresponding inner angles of 90°, 80°, and 103°. 32,55 In addition, it has been reported that the solubility of organic molecules, the choice of different solvents, the assistance of surfactant or template, etc. , can affect the crystal nucleation process and then result in different morphologies of the organic micro/nanostructures.…”

Section: Aggregation Mode and Crystal Morphologymentioning

confidence: 99%