Synthesis and characterization of CuInS2 nanocrystals prepared by solvothermal/molten salt method

被引：14
作者：
Benchikhi, Mohamed [1 ,2 ]
El Ouatib, Rachida [1 ]
Er-Rakho, Lahcen [1 ]
Durand, Bernard [2 ]
机构：
[1] Univ Hassan II Casablanca, Fac Sci Ain Chock, Lab Physicochim Mat Inorgan, Casablanca, Morocco
[2] Univ Toulouse, CNRS, Inst Camot CIRIMAT, 118 Route Narbonne, F-31062 Toulouse 9, France
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 09期
关键词：
CuInS2; Solvothermal synthesis; Molten salt method; Crystallization; Nanocrystal; MOLTEN POTASSIUM THIOCYANATE; THIN-FILM; OPTICAL-PROPERTIES; GROWTH; DECOMPOSITION;
D O I：
10.1016/j.ceramint.2016.04.048
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Highly crystallized CuInS2 (CIS) nanocrystals were successfully synthesized using a molten-salt method with CuInS2 nanoparticles as precursors. The ultrafine precursors have been synthesized by the solvothermal reactions of metal chlorides and thiourea in ethylene glycol in the presence of sodium hydroxide. The effects of reaction temperature, dwell time and salt to reactant ratio on the crystallinity and morphology of CuInS2 powders were investigated. The powders were characterized by X-ray diffraction, transmission electron microscopy, BET surface area measurements, energy dispersive X-ray spectroscopy and UV-vis absorption spectroscopy techniques. Crystallizations carried out at 550 degrees C for 6 h with KSCN/CuInS2=3.75 M ratio lead to a powder formed of nanocrystals with a size in the range 25-35 nm and exhibits a specific surface area close to 35 m(2)/g. EDS results showed the formation of stoichiometric CuInS2 nanocrystals. The UV-vis absorption spectrum showed that the CuInS2 nanocrystals had a good absorbance in visible region with a band gap close to 1.5 eV, which is in the range desirable for photovoltaic applications. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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页码：11303 / 11308
页数：6
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