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Atomically thin heavy-metal-free ZnTe nanoplatelets formed from magic-size nanoclusters
Nanoscale Advances ( IF 4.6 ) Pub Date : 2020-05-27 , DOI: 10.1039/d0na00409j Fei Wang 1 , Minyi Zhang 2 , Wei Chen 1 , Shaghraf Javaid 1 , Heng Yang 3 , Sheng Wang 3 , Xuyong Yang 3 , Lai-Chang Zhang 4 , Mark A Buntine 1 , Chunsen Li 2 , Guohua Jia 1
Nanoscale Advances ( IF 4.6 ) Pub Date : 2020-05-27 , DOI: 10.1039/d0na00409j Fei Wang 1 , Minyi Zhang 2 , Wei Chen 1 , Shaghraf Javaid 1 , Heng Yang 3 , Sheng Wang 3 , Xuyong Yang 3 , Lai-Chang Zhang 4 , Mark A Buntine 1 , Chunsen Li 2 , Guohua Jia 1
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Atomically thin colloidal quasi-two-dimensional (2D) semiconductor nanoplatelets (NPLs) have attracted tremendous attention due to their excellent properties and stimulating applications. Although some advances have been achieved in Cd- and Pb-based semiconductor NPLs, research into heavy-metal-free NPLs has been reported less due to the difficulties in the synthesis and the knowledge gap in the understanding of the growth mechanism. Herein wurtzite ZnTe NPLs with an atomic thickness of about 1.5 nm have been successfully synthesized by using Superhydride (LiEt3BH) reduced tributylphosphine–Te (TBP-Te) as the tellurium precursor. Mechanistic studies, both experimentally and theoretically, elucidate the transformation from metastable ZnTe MSC-323 magic-size nanoclusters (MSCs) to metastable ZnTe MSC-398, which then forms wurtzite ZnTe NPLs via an oriented attachment mechanism along the [100] and [002] directions of the wurtzite structure. This work not only provides insightful views into the growth mechanism of 2D NPLs but also opens an avenue for their applications in optoelectronics.
中文翻译：
由神奇尺寸的纳米团簇形成的原子级薄无重金属 ZnTe 纳米片
原子级薄胶体准二维（2D）半导体纳米片（NPL）由于其优异的性能和刺激应用而引起了极大的关注。尽管在基于 Cd 和 Pb 的半导体 NPL 方面取得了一些进展，但由于合成困难和对生长机制的理解存在知识差距，对无重金属 NPL 的研究报道较少。本文通过使用超氢化物（LiEt 3BH) 还原三丁基膦-Te (TBP-Te) 作为碲前体。实验和理论上的机理研究阐明了从亚稳态 ZnTe MSC-323 神奇尺寸纳米团簇 (MSCs) 到亚稳态 ZnTe MSC-398 的转变，然后通过沿 [100] 和 [002] 的定向附着机制形成纤锌矿 ZnTe NPL ] 纤锌矿结构的方向。这项工作不仅为二维 NPL 的生长机制提供了深刻的见解，而且为它们在光电子学中的应用开辟了一条途径。
更新日期：2020-05-27
中文翻译：
由神奇尺寸的纳米团簇形成的原子级薄无重金属 ZnTe 纳米片
原子级薄胶体准二维（2D）半导体纳米片（NPL）由于其优异的性能和刺激应用而引起了极大的关注。尽管在基于 Cd 和 Pb 的半导体 NPL 方面取得了一些进展，但由于合成困难和对生长机制的理解存在知识差距，对无重金属 NPL 的研究报道较少。本文通过使用超氢化物（LiEt 3BH) 还原三丁基膦-Te (TBP-Te) 作为碲前体。实验和理论上的机理研究阐明了从亚稳态 ZnTe MSC-323 神奇尺寸纳米团簇 (MSCs) 到亚稳态 ZnTe MSC-398 的转变，然后通过沿 [100] 和 [002] 的定向附着机制形成纤锌矿 ZnTe NPL ] 纤锌矿结构的方向。这项工作不仅为二维 NPL 的生长机制提供了深刻的见解，而且为它们在光电子学中的应用开辟了一条途径。
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