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The shape-controlled synthesis of alloyed CdSxSe1−x nanocrystals and their applications in LEDs

Le Na Faculty of Materials Science and Engineering, Phenikaa University, Hanoi, 12116, Viet Nam|
Nguyen (57989064200) | Vu Ngoc (57989744500); Huu Tuan | Nguyen Viet (57989333400); Hai | Duong Anh (57989470700); Huong | Pham Kim (57222258258); Tuan Faculty of Electrical and Electronic Engineering, Phenikaa University, Hanoi, 12116, Viet Nam| Vo Thi (57989744400); Ngoc Phenikaa Research and Technology Institute (PRATI), A&A Green Phoenix Group, 167 Hoang Ngan, Hanoi, 13313, Viet Nam|

Advances in Natural Sciences: Nanoscience and Nanotechnology Số 4, năm 2022 (Tập 13, trang -)

ISSN: 20436262

ISSN: 20436262

DOI: 10.1088/2043-6262/aca0f0

Tài liệu thuộc danh mục:



Từ khóa: Access control; Alloys; Cadmium compounds; Fluorescence spectroscopy; High resolution transmission electron microscopy; Light emitting diodes; Luminescence; Nanorods; Optical properties; Alloy CdSxse1−x; Alloy nanocrystals; CdS; Different shapes; Light-emitting device; Nanocrystal shape; Nanoscale engineering; Shape controlled synthesis; Shape variations; Synthesised; Nanocrystals
Tóm tắt tiếng anh
Alloy nanocrystals (NCs) provide access and control of the parameters for nanoscale engineering because their physical and optical properties depend on size, shape, and composition. Here, alloy CdSx Se1−x NCs with different shapes were synthesised via a one-pot method using cadmium acetate, sulfur, and selenium as precursors in trioctylphosphine solution. The luminescence and shapes of NCs were characterised by fluorescence spectroscopy and transmission electron microscopy, respectively. It was found that the modification of precursor concentration resulted in NC shape variation, including branched NCs, long and short nanorods. Consequently, a series of alloy CdSxSe1−x NCs with different shape-based light emitting devices (LEDs) were fabricated and their operation characteristics were also compared. The obtained luminance and luminous efficiency showed that the control of NC shape is the key factor for the improvement of LED performance. We anticipate that this work will provide further insight into the design of CdSxSe1−x NCs-based LEDs with shape variation. © 2022 Vietnam Academy of Science & Technology.

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