半导体纳米片:从材料合成到光电集成

IF 55.8 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Benjamin T. Diroll, Burak Guzelturk, Hong Po, Corentin Dabard, Ningyuan Fu, Lina Makke, Emmanuel Lhuillier and Sandrine Ithurria*, 
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引用次数: 31

摘要

半导体胶体合成领域出现于40年前,由于在商业显示器中使用纳米晶体作为荧光粉,已经达到了一定的成熟程度。特别是,基于镉、锌或汞硫族化合物的II-VI半导体,现在可以通过合金合成具有定制形状、成分甚至纳米晶体异质结构的半导体。15年前,II-VI半导体纳米血小板为这一领域注入了新的思路。事实上,尽管出现了其他有前途的半导体,如卤化物钙钛矿或二维过渡金属二硫族化物,胶体II-VI半导体纳米片仍然是可以在宽光谱范围内合成的最窄的室温发射体之一,并且随着时间的推移,它们表现出良好的材料稳定性。这种纳米片在科学和技术上都很有趣,因为它们在胶体量子点和外延量子阱的交汇处表现出光学特性和生产优势。在有机溶剂中,克级合成可以产生具有相同厚度和光学性质的纳米颗粒,而不会出现不均匀的展宽。在这样的纳米薄片中,量子约束被限制在一个维度上,在原子尺度上定义,这使得它们可以被视为量子阱。本文就纳米血小板的合成进展、光谱特性及其应用作一综述。在生长机制方面,我们解释了对纳米血小板生长的透彻理解如何使纳米血小板和异质结构纳米血小板的发展具有多种发射颜色、空间局域激发、窄发射和宽光谱范围内的高量子产率。此外,纳米薄片横向延伸大,轴长短,介电环境低,可以支持一个或多个具有大激子结合能的电子-空穴对。因此,我们还讨论了与球形量子点和外延量子阱相比,纳米片中的载流子和激子的弛豫过程和寿命是如何改变的。最后,我们探讨了纳米血小板如何以其强而窄的发射,被认为是纯色发光二极管(led)的理想候选者,激光的强增益介质,或用于发光聚光器。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

2D II–VI Semiconductor Nanoplatelets: From Material Synthesis to Optoelectronic Integration

2D II–VI Semiconductor Nanoplatelets: From Material Synthesis to Optoelectronic Integration

The field of colloidal synthesis of semiconductors emerged 40 years ago and has reached a certain level of maturity thanks to the use of nanocrystals as phosphors in commercial displays. In particular, II–VI semiconductors based on cadmium, zinc, or mercury chalcogenides can now be synthesized with tailored shapes, composition by alloying, and even as nanocrystal heterostructures. Fifteen years ago, II–VI semiconductor nanoplatelets injected new ideas into this field. Indeed, despite the emergence of other promising semiconductors such as halide perovskites or 2D transition metal dichalcogenides, colloidal II–VI semiconductor nanoplatelets remain among the narrowest room-temperature emitters that can be synthesized over a wide spectral range, and they exhibit good material stability over time. Such nanoplatelets are scientifically and technologically interesting because they exhibit optical features and production advantages at the intersection of those expected from colloidal quantum dots and epitaxial quantum wells. In organic solvents, gram-scale syntheses can produce nanoparticles with the same thicknesses and optical properties without inhomogeneous broadening. In such nanoplatelets, quantum confinement is limited to one dimension, defined at the atomic scale, which allows them to be treated as quantum wells. In this review, we discuss the synthetic developments, spectroscopic properties, and applications of such nanoplatelets. Covering growth mechanisms, we explain how a thorough understanding of nanoplatelet growth has enabled the development of nanoplatelets and heterostructured nanoplatelets with multiple emission colors, spatially localized excitations, narrow emission, and high quantum yields over a wide spectral range. Moreover, nanoplatelets, with their large lateral extension and their thin short axis and low dielectric surroundings, can support one or several electron–hole pairs with large exciton binding energies. Thus, we also discuss how the relaxation processes and lifetime of the carriers and excitons are modified in nanoplatelets compared to both spherical quantum dots and epitaxial quantum wells. Finally, we explore how nanoplatelets, with their strong and narrow emission, can be considered as ideal candidates for pure-color light emitting diodes (LEDs), strong gain media for lasers, or for use in luminescent light concentrators.

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来源期刊
Chemical Reviews
Chemical Reviews 化学-化学综合
CiteScore
106.00
自引率
1.10%
发文量
278
审稿时长
4.3 months
期刊介绍: Chemical Reviews is a highly regarded and highest-ranked journal covering the general topic of chemistry. Its mission is to provide comprehensive, authoritative, critical, and readable reviews of important recent research in organic, inorganic, physical, analytical, theoretical, and biological chemistry. Since 1985, Chemical Reviews has also published periodic thematic issues that focus on a single theme or direction of emerging research.
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