Linearly arranged polytypic CZTSSe nanocrystals

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 nanocrsyta...

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Bibliographic Details
Published in:Scientific reports 2012-12, Vol.2 (1), p.952, Article 952
Main Authors: 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
Format: Article
Language:English
Subjects:
639/301/299/2736
639/301/357
639/638/549
639/638/925
Crystals
Humanities and Social Sciences
Laboratories
Morphology
multidisciplinary
Nanocrystals
Science
Semiconductors
Temperature effects
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Summary: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 I 2 -II-IV-VI 4 nanocrystals, with a focus on polytypic non-stoichiometric Cu 2 ZnSnS x Se 4−x nanocrystals. Each synthesized polytypic non-stoichiometric Cu 2 ZnSnS x Se 4−x nanocrystal 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 Cu 2 ZnSnS x Se 4-x nanocrystals.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep00952