Compositionally Tunable Cu2ZnSn(S1–xSex)4 Nanocrystals: Probing the Effect of Se-Inclusion in Mixed Chalcogenide Thin Films

Riha, Shannon C.; Parkinson, B. A.; Prieto, Amy L.

doi:10.1021/ja2058692

Cited by 232 publications

(233 citation statements)

References 19 publications

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“…The result shows the effective band gap of the synthesized CZTSe NCs is 1.46 eV, which is consistent with those of the reported NCs synthesized by solution methods. 25,34 Recently, hybrid organic-inorganic devices have attracted increasing attention for a logic choice to combine the unique properties of NCs with the easy film-forming property of organic polymers. 1,[5][6][7][8]16,35,36 To test the potential application for photoelectric devices, the assynthesized NCs were uniformly dispersed in P3HT matrix to form a three dimensional interconnected network, which leads to a large interface area favorable for charge carrier generation.…”

Section: Resultsmentioning

confidence: 99%

Wurtzite Cu2ZnSnSe4 nanocrystals for high-performance organic–inorganic hybrid photodetectors

2012

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Indium-free quaternary chalcogenide, Cu 2 ZnSnSe 4 (CZTSe), has driven much attention for its potential application in photovoltaics and optoelectronics. It is well known that the composition and structure of nanocrystals (NCs) significantly affect their optical and electrical properties. Controllable synthesis of materials with new crystal structures, especially metastable structures, has given impetus to the development of nanomaterials with many new exciting properties and applications. Highquality CZTSe NCs with thermodynamically metastable wurtzite phase and optical band gap of 1.46 eV were herein synthesized via a facile, lost-cost and safe-solution method. The formation mechanism of the wurtzite CZTSe NCs was investigated in detail, which indicates high reaction rate and low surface energy are favorable for the formation of wurtzite structure. The promising application of as-synthesized NCs in photovoltaics and optoelectronics has been demonstrated by the high-performance hybrid photodetector made from CZTSe NCs and P3HT, with an on/off ratio larger than 150.

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Section: Resultsmentioning

confidence: 99%

Wurtzite Cu2ZnSnSe4 nanocrystals for high-performance organic–inorganic hybrid photodetectors

2012

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“…There are several reports on the synthesis of CZTS nanocrystals by hot-injection method (Guo et al 2010(Guo et al , 2009Riha et al 2009). In general, CZTS nanocrystals are mostly in the kesterite or stannite phase (Shavel et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of wurtzite copper zinc tin sulfide nanocones for improved solar photovoltaic utilization

et al. 2014

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Cu 2 ZnSnS 4 (CZTS) is considered to be one of the most promising light absorbing materials for low-cost and high-efficiency thin-film solar cells. It is composed of earth abundant, non-toxic elements. In the present study, wurtzite CZTS nanocone has been synthesized by a green chemistry route. The nanocones have been characterized for its optical, structural and microstructural properties using UV-Vis spectrophotometer, X-ray diffraction, Raman spectroscopy and high-resolution transmission electron microscopy. Optical absorption result shows a band gap of 1.42 eV. XRD and Raman results show wurtzite structure and TEM studies reveal the nanocone structure of the grown material. Growing vertically aligned nanocone structure having smaller diameter shall help in enhancing the light absorption in broader range which shall enhance the efficiency of solar cell. This study is a step in this direction.

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“…To date, several colloidal NCs of mixed metal ''sulfides-selenides'' have been reported, for example HgS y Se 1Ày , 6 ZnS y Se 1Ày , 7 SnS y Se 1Ày , 8 CdS y Se 1Ày , 9 PbS y Se 1Ày , 10 CuIn-(S y Se 1Ày ) 2 , 11 Cu x Fe 4 Sn 12 (S y Se 1Ày ) 32 12 and Cu 2 ZnSn(S y Se 1Ày ) 4 . 13 On the other hand, the ability to control the crystal phase and to obtain NCs in phases that were previously non-accessible is also quite relevant (see for example recent works on wurtzite Cu 2 ZnSnSe 4 and Cu 2 ZnSnS 4 NCs). 14 Concerning the homogeneous Cu 2Àx (S y Se 1Ày ) alloy, only a few works have shown control over y (i.e.…”

Section: Introductionmentioning

confidence: 99%

Colloidal Cu2−x(SySe1−y) alloy nanocrystals with controllable crystal phase: synthesis, plasmonic properties, cation exchange and electrochemical lithiation

et al. 2012

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Cubic and hexagonal phase Cu 2-x (S y Se 1-y ) alloy nanocrystals, with a well-defi ned near-infrared valence band plasmon resonance, were transformed in the corresponding Cd-based alloy nanocrystals, with the comparable S y Se 1-y stoichiometry, by cation exchange preserving the original crystal structure. Cubic Cu 2-x (S 0.5 Se 0.5 ) nanocrystals were then evaluated as anode material in Li-ion batteries. As featured in:See E. Dilena et al., J. Mater. Chem., 2012, 22 We report synthetic routes to both cubic and hexagonal phase Cu 2Àx (S y Se 1Ày ) alloy nanocrystals exhibiting a well-defined near-infrared valence band plasmon resonance, the spectral position of which is dependent mainly on x, i.e. on Cu stoichiometry, and to a lesser extent on the crystal phase of the NCs. For cubic Cu 2Àx (S y Se 1Ày ) nanocrystals y could be varied in the 0.4-0.6 range, while for hexagonal nanocrystals y could be varied in the 0.3-0.7 range. Furthermore, the Cu 2Àx (S y Se 1Ày ) nanocrystals could be transformed into the corresponding Cd-based alloy nanocrystals with comparable S y Se 1Ày stoichiometry, by cation exchange. The crystal phase of the resulting Cd(S y Se 1Ày ) nanocrystals was either cubic or hexagonal, depending on the phase of the starting nanocrystals. One sample of cubic Cu 2Àx (S y Se 1Ày ) nanocrystals, with S 0.5 Se 0.5 chalcogenide stoichiometry, was then evaluated as the anode material in Li-ion batteries. The nanocrystals were capable of undergoing lithiation/delithiation via a displacement/conversion reaction (Cu to Li and vice versa) in a partially reversible manner.

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Compositionally Tunable Cu₂ZnSn(S_1–xSe_x)₄ Nanocrystals: Probing the Effect of Se-Inclusion in Mixed Chalcogenide Thin Films

Cited by 232 publications

References 19 publications

Wurtzite Cu2ZnSnSe4 nanocrystals for high-performance organic–inorganic hybrid photodetectors

Wurtzite Cu2ZnSnSe4 nanocrystals for high-performance organic–inorganic hybrid photodetectors

Green synthesis of wurtzite copper zinc tin sulfide nanocones for improved solar photovoltaic utilization

Colloidal Cu2−x(SySe1−y) alloy nanocrystals with controllable crystal phase: synthesis, plasmonic properties, cation exchange and electrochemical lithiation

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