Photoelectrochemical properties of orthorhombic and metastable phase SnS nanocrystals synthesized by a facile colloidal method

Po Chia Huang, Jow Lay Huang, Sheng Chang Wang, Muhammad Omar Shaikh, Chia Yu Lin

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

SnS of orthorhombic (OR) and metastable (SnS) phases were synthesized by using a simple and facile colloidal method. The tin precursor was synthesized using tin oxide (SnO) and oleic acid (OA), while the sulfur precursor was prepared using sulfur powder (S) and oleyamine (OLA). The sulfur precursor was injected into the tin precursor and the prepared SnS nanocrystals were precipitated at a final reaction temperature of 180 °C. The results show that hexamethyldisilazane (HMDS) can be successfully used as a surfactant to synthesize monodisperse 20 nm metastable SnS nanoparticles, while OR phase SnS nanosheets were obtained without HMDS. The direct bandgap observed for the metastable SnS phase is higher (1.66 eV) as compared to the OR phase (1.46 eV). The large blueshift in the direct bandgap of metastable SnS is caused by the difference in crystal structure. The blueshift in the direct band gap value for OR-SnS could be explained by quantum confinement in two dimensions in the very thin nanosheets. SnS thin films used as a photo anode in a photoelectrochemical (PEC) cell were prepared by spin coating on the fluorine-doped tin oxide (FTO) substrates. The photocurrent density of the SnS (metastable SnS)/FTO and SnS (OR)/FTO are 191.8 μA/cm2 and 57.61 μA/cm2 at an applied voltage of - 1 V at 150 W, respectively. These narrow band gap and low cost nanocrystals can be used for applications in future optoelectronic devices.

原文English
頁(從 - 到)135-139
頁數5
期刊Thin Solid Films
596
DOIs
出版狀態Published - 2015 12月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 表面和介面
  • 表面、塗料和薄膜
  • 金屬和合金
  • 材料化學

指紋

深入研究「Photoelectrochemical properties of orthorhombic and metastable phase SnS nanocrystals synthesized by a facile colloidal method」主題。共同形成了獨特的指紋。

引用此