Synthesis of silicon nanowire and crystalline carbon quantum dots heterostructure and study of photo response and photoluminescence property

摘要

Silicon nanowire based heterostrucure or nanocomposites becomes intrigued in next generation energy conversion devices. Herein, we have prepared n type silicon nanowires (n-SiNWs) and water soluble Carbon Quantum Dots (CQD) through metal assisted etching and hydrothermal method respectively. The CQD possesses very low dimensions around 2-4 nm which becomes spin coated on n type silicon nanowires. The formation of silicon nanowires/ Carbon Quantum Dots heterostructures (n-SiNW/CQD) exhibits excellent photo current properties with Ilight/IDark had apparent value within the range 1.36-3.83. The heterostructure also exhibits a strong photoluminescence spectrum in blue region.