Proceedings of nanoGe September Meeting 2017 (NFM17)
Publication date: 20th June 2016
Cu2ZnSnSe4 (CZTSe) nanocrystals (NCs) combine many promising properties, such as high optical absorption coefficient and improved thermoelectric properties[1]. The multinary composition of CZTSe NCs offers a high flexibility for targeted-application tuning without the usage of toxic elements or elements of extreme rarity.[2] Moreover, polytypic Cu2ZnSnS4, Cu2ZnSn(SSe)4 NCs have shown promising optical properties in previous research.[3-5] Amongst polytypic NCs, tetrapod-shaped NCs are particularly interesting. The 3 dimensional structure gives the tetrapods more tunable parameters, such as arm length and width.[6, 7]
Herein, the synthesis of Cu2ZnSnSe4 (CZTSe) tetrapod NCs using hot injection approach is reported. The quaternary copper selenide based NCs consist of a cubic core and four tetrahedrally attached short wurtzite arms. CZTSe tetrapod NCs are the first polytypic structure and the first 3D structure reported in CZTSe NCs. Zn composition in NCs is varied from 2.2% to 7.6% (atomic%, SEM-EDS) which is a considerable improvement from the low Zn compositions reported in other researches on CZTSe NCs.[8] Furthermore, it is observed that as the zinc composition increases, the core to arms volume ratio increases accordingly. Other characterization techniques such as Raman spectroscopy, X-ray diffraction, photoluminescence are employed to understand the structure better.
References:
1. Coughlan, C., et al., Chem. Rev., 2017. 117(9): p. 5865-6109.
2. Aldakov, D., et al., J. Mater. Chem. C, 2013. 1(24): p. 3756-3776.
3. Coughlan, C., et al., CrystEngComm, 2015. 17(36): p. 6914-6922.
4. Singh, S., et al., Chem. Mater., 2015. 27(13): p. 4742-4748.
5. Singh, A., et al., J. Am. Chem. Soc., 2012. 134(6): p. 2910-2913.
6. Manna, L., et al., Nat. Mater., 2003. 2(6): p. 382-5.
7. Wang, J., et al., J. Am. Chem. Soc., 2013. 135(21): p. 7835-8.
8. Shavel, A., et al., J. Am. Chem. Soc., 2010. 132(13): p. 4514-4515.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.