Proceedings Article | 3 November 2016
KEYWORDS: Nanocrystals, Doping, Photocatalysis, Semiconductors, Group II-VI semiconductors, Optoelectronics, Luminescence, Thermodynamics, Metals, Gold
Abstract: Including the shape and size effect, the controllable doping, hetero-composite and surface/interface are the prerequisite of colloidal nanocrystals for exploring their optoelectronic properties, such as fluorescence, plasmon-exciton coupling, efficient electron/hole separation, and enhanced photocatalysis applications. By controlling soft acid-base coordination reactions between cation molecular complexes and colloidal nanocrystals, we showed that chemical thermodynamics could drive nanoscale monocrystalline growth of the semiconductor shell on metal nano-substrates and the substitutional heterovalent doping in semiconductor nanocrystals. We have demonstrated evolution of relative position of Au and II-VI semiconductor in Au-Semi from symmetric to asymmetric configuration, different phosphines initiated morphology engineering, oriented attachment of quantum dots into micrometer nanosheets with synergistic control of surface/interface and doing, which can further lead to fine tuning of plasmon-exciton coupling. Therefore, different hydrogen photocatalytic performance, Plasmon enhanced photocatalysis properties have been achieved further which lead to the fine tuning of plasmon-exciton coupling. Substitutional heterovalent doping here enables the tailoring of optical, electronic properties and photocatalysis applications of semiconductor nanocrystals because of electronic impurities (p-, n-type doping) control.
References:
(1) J. Gui, J. Zhang*, et al. Angew. Chem. Int. Ed. 2015, 54, 3683.
(2) Q. Zhao, J. Zhang*, etc., Adv. Mater. 2014, 26, 1387.
(3) J. Liu, Q. Zhao, S. G. Wang*, J. Zhang*, etc., Adv. Mater. 2015, 27，2753-2761.
(4) H. Qian, J. Zhang*, etc., NPG Asia Mater. (2015) 7, e152.
(5) M. Ji, M. Xu, etc., J. Zhang*, Adv. Mater. 2016, in proof.
(6) S. Yu, J. T. Zhang, Y. Tang, M. Ouyang*, Nano Lett. 2015, 15, 6282-6288.
(7) J. Zhang, Y. Tang, K. Lee and M. Ouyang*, Science 2010, 327, 1634.
(8) J. Zhang, Y. Tang, K. Lee, M. Ouyang*, Nature 2010, 466, 91.
