Linearly arranged polytypic CZTSSe nanocrystals.

Linearly arranged polytypic CZTSSe nanocrystals.
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线性排列的多型CZTSSe纳米晶

DOI:
10.1038/srep00952
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发表时间:
2012
期刊:
影响因子:
4.6
通讯作者:
Yu, Shu-Hong
Yu, Shu-Hong
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Fan, Feng-Jia;Wu, Liang;Gong, Ming;Chen, Shi You;Liu, Guang Yao;Yao, Hong-Bin;Liang, Hai-Wei;Wang, Yi-Xiu;Yu, Shu-Hong

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即使胶体多型纳米结构在带隙调节和排列方面显示出广阔的前景,但由于合成困难,对它们的研究比标准纳米异质结构要少得多。迄今为止,胶体多型纳米晶的受控合成仅在具有支化结构的II-VI四足和八足纳米晶中实现。在此,我们报告了一种合成非支化但线性排列的多型 I2-II-IV-VI4 纳米晶体的胶体方法,重点是多型非化学计量 Cu2ZnSnSxSe4−x 纳米晶体。每个合成的多型非化学计量 Cu2ZnSnSxSe4−x 纳米晶体由两个闪锌矿衍生的末端和一个纤锌矿衍生的中心部分组成。研究了其形成机理,并可以通过调节反应温度来调节相组成,为Cu2ZnSnSxSe4-x纳米晶体的带隙调节提供了一种新的方法。
Even colloidal polytypic nanostructures show promising future in band-gap tuning and alignment, researches on them have been much less reported than the standard nano-heterostructures because of the difficulties involved in synthesis. Up to now, controlled synthesis of colloidal polytypic nanocrsytals has been only realized in II-VI tetrapod and octopod nanocrystals with branched configurations. Herein, we report a colloidal approach for synthesizing non-branched but linearly arranged polytypic I2-II-IV-VI4nanocrystals, with a focus on polytypic non-stoichiometric Cu2ZnSnSxSe4−xnanocrystals. Each synthesized polytypic non-stoichiometric Cu2ZnSnSxSe4−xnanocrystal is consisted of two zinc blende-derived ends and one wurtzite-derived center part. The formation mechanism has been studied and the phase composition can be tuned through adjusting the reaction temperature, which brings a new band-gap tuning approach to Cu2ZnSnSxSe4-xnanocrystals.
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