期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 301, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.molliq.2019.112413
关键词
Nanocomposite; Solar cell; Flower-like morphology; Carbon dots; Hydrothermal
资金
- council of Iran National Science Foundation
- INSF [97017837]
- University of Kashan [159271/879]
In this paper, cadmium sulfide (CdS), sulfur and nitrogen co-doped carbon dots (S,N-CDs) and cadmium sulfide/sulfur and nitrogen co-doped carbon dots (CdS/S,N-CDs) were prepared via hydrothermal route. Cadmium acetate dihydrate, thiourea and citric acid were applied as a source of cadmium, sulfur and carbon respectively. Thiourea plays dual role as a dopant source for doping of carbon dots and sulfur source for the synthesis of cadmium sulfide. The influence of hydrothermal temperature on the morphology of CdS and CdS/S,N-CDs was determined in terms of structure, size and morphology through X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and Fourier-transform infrared spectroscopy (FTIR) analysis. Results showed that temperature has a significant effect on the morphology of cadmium sulfide. Homogenous flower like morphology of CdS in 160 degrees C was converted to non-homogenous worm-like particles at 200 degrees C. Moreover, the flower-like morphology of CdS was converted to the particle morphology during the preparation of CdS/S,N-CDs since the acidity of solution is changed for the presence of citric acid. After morphological and structural engineering, nitrogen and sulfur co-doped carbon dots and CdS/S,N-CDs were applied in dye sensitized solar cells. The J(SC) of S,N-CDs and CdS/S,N-CDs were measured 14.07 and 18.38 mA/cm(2) respectively. Results showed that the V-OC equal to 0.61 V for CDs while decreased to 0.59 V in CdS/S,N-CDs case. Although V-OC decreased, hole PCE show improvement in CdS/S,N-CDs case, PCE enhanced from 3.44% to 5.7%. (C) 2019 Elsevier B.V. All rights reserved.
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