Synthesis and optical properties of single-crystalline SnS <sub> 1− <i>x</i> </sub> Se <i> <sub>x</sub> </i> nanobelts
Shengru Wang, Xiaofang Lai, Bingsheng Du, Junhao Ma, Peihua Wang, Jikang Jian
Abstract
In this work, SnS 1− x Se x ternary nanobelts were synthesized by a facile hydrothermal method without the assistance of surfactants. The structure, morphology, microstructure, compositions, chemical valences, phonon modes, and optical band gaps of the SnS 1− x Se x nanobelts were characterized in detail. The results indicate that the SnS 1− x Se x nanobelts have uniform one-dimensional morphology and are single crystals with high crystallinity. Se is incorporated into the SnS lattice to substitute for S-forming ternary SnS 1− x Se x alloy. With the increase of Se doping concentration, the optical band gaps of the nanobelts gradually decrease from 1.15 to 1.01 eV, confirming the tunable optical property achieved here.