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用于光电子学的室温玻璃态三（酮腙）盘状液晶及其与单壁碳纳米管的纳米复合材料的光致发光薄膜

Photoluminescent Thin Films of Room-Temperature Glassy Tris(keto-hydrozone) Discotic Liquid Crystals and Their Nanocomposites with Single-Walled Carbon Nanotubes for Optoelectronics.

作者信息

Hadjichristov Georgi B, Marinov Yordan G

机构信息

Laboratory of Optics & Spectroscopy, Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., Sofia BG-1784, Bulgaria.

Laboratory of Liquid Crystals & Biomolecular Layers, Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., Sofia BG-1784, Bulgaria.

出版信息

ACS Omega. 2023 Jul 18;8(30):27102-27116. doi: 10.1021/acsomega.3c02103. eCollection 2023 Aug 1.

DOI:10.1021/acsomega.3c02103
PMID:37546593
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10398711/
Abstract

This study addresses the photoresponse of liquid-crystalline tris(keto-hydrozone) discotic (TKHD)-a star-shaped molecular structure with three branches. Object of our research interest was also TKHD filled with single-walled carbon nanotubes (SWCNTs) at a concentration of 1 wt %. At room temperature, the discotic liquid crystals in thin films (thickness 3 μm) of both TKHD and nanocomposite SWCNT/TKHD were in a glassy state. Such glassy thin films exhibited photoluminescence ranging from the deep-red to the near-infrared spectral region, being attractive for organic optoelectronics. The addition of SWCNTs to TKHD was found to stabilize the photoluminescence of TKHD, which is of significance for optoelectronic device applications. The photothermoelectrical response of highly conductive SWCNT/TKHD nanocomposite films was characterized by electrical impedance spectroscopy in the frequency range from 1 Hz to 1 MHz of the applied electric field. It was elucidated that the reversible photothermoelectrical effect in SWCNT/TKHD films occurs through SWCNTs and their network.

摘要

本研究探讨了盘状液晶三（酮腙）（TKHD）——一种具有三个分支的星形分子结构——的光响应。我们的研究兴趣对象还包括填充有浓度为1 wt%的单壁碳纳米管（SWCNT）的TKHD。在室温下，TKHD和纳米复合材料SWCNT/TKHD的薄膜（厚度3μm）中的盘状液晶处于玻璃态。这种玻璃态薄膜表现出从深红色到近红外光谱区域的光致发光，对有机光电子学具有吸引力。发现将SWCNT添加到TKHD中可稳定TKHD的光致发光，这对光电器件应用具有重要意义。通过在1 Hz至1 MHz的施加电场频率范围内的电阻抗谱对高导电性SWCNT/TKHD纳米复合薄膜的光热电响应进行了表征。结果表明，SWCNT/TKHD薄膜中的可逆光热电效应是通过SWCNT及其网络发生的。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afd3/10398711/779f962f9d5d/ao3c02103_0012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afd3/10398711/779f962f9d5d/ao3c02103_0012.jpg

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本文引用的文献

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