表面调谐碲化银胶体量子点的扩展短波长红外墨水及其红外光探测

IF 9.6 1区 化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Gahyeon Kim, Dongsun Choi, So Young Eom, Eui Dae Jung, Jin Hyeok Lee, Benjamin Rehl, Si Yu Kim, Sjoerd Hoogland, Edward H. Sargent* and Kwang Seob Jeong*, 
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引用次数: 0

摘要

波长可调的红外材料,特别是那些不含受管制物质的材料,对于下一代光电子技术至关重要。碲化银(Ag2Te)胶体量子点(CQDs)由于毒性低,有望成为传统铅基或镉基窄带隙半导体的替代品。然而,硫醇配体的强结合亲和力限制了 Ag2Te CQDs 的广泛应用,因此需要更多的表面化学物质。在这里,我们合成了用油胺钝化的 Ag2Te CQDs,这有助于采用各种配体钝化策略。由于键合强度较弱,因此可以制备对 1.1-2.7 μm 红外辐射敏感的 X-Ag2Te CQD(X = Cl、Br 或 I 配体)油墨。利用这种 CQD 油墨,我们制造出了具有两种不同尺寸 CQD 的扩展短波红外 (eSWIR) CQD 光电二极管。所制备的基于 Ag2Te CQD 墨水的 eSWIR 光电二极管在室温下 1.7 μm 波长处的外部量子效率为 16%,这是无毒 CQD 红外探测器在该波长处达到的最高值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Extended Short-Wavelength Infrared Ink by Surface-Tuned Silver Telluride Colloidal Quantum Dots and Their Infrared Photodetection

Extended Short-Wavelength Infrared Ink by Surface-Tuned Silver Telluride Colloidal Quantum Dots and Their Infrared Photodetection

Wavelength-tunable infrared materials, particularly those excluding regulated substances, are essential for next-generation optoelectronics. Silver telluride (Ag2Te) colloidal quantum dots (CQDs) can be a promising alternative to traditional Pb- or Cd-based narrow-band gap semiconductors due to their low toxicity. However, the strong binding affinity of thiol ligands has limited the broader use of Ag2Te CQDs, necessitating more versatile surface chemistries. Here, we synthesized Ag2Te CQDs passivated with oleylamine, which facilitated various ligand passivation strategies. The weak bonding strength allows the preparation of X-Ag2Te CQD (X = Cl, Br, or I ligands) inks, sensitive to 1.1–2.7 μm infrared radiation. Using the CQD inks, we fabricated extended short-wavelength infrared (eSWIR) CQD photodiodes with two different sizes of CQDs. The resulting Ag2Te CQD ink-based eSWIR photodiodes exhibited an external quantum efficiency of 16% at 1.7 μm at room temperature, representing the highest value achieved for nontoxic CQD IR detectors at the wavelength.

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来源期刊
ACS Materials Letters
ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
14.60
自引率
3.50%
发文量
261
期刊介绍: ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.
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