Open AccessPreparation and photoelectrochemical properties of porous silicon/carbon dots composites
Author(s) -
Xiangdong Kang,
Lin Wu,
Jinhui Xu,
Dong Liu,
Quangui Song,
Yu Hu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/892/1/012025
Subject(s) - materials science , porous silicon , silicon , carbon fibers , composite material , photoluminescence , etching (microfabrication) , graphite , porosity , nanocrystalline silicon , chemical engineering , crystalline silicon , composite number , optoelectronics , amorphous silicon , layer (electronics) , engineering
Porous silicon/carbon dots composites were prepared by electrolyzing and deposition with two graphite rods working as electrodes. The porous silicon was prepared by metal assisted chemical etching of silicon powder and then added into the ultra-pure water electrolyte. The structure and morphology of porous silicon, carbon dots and porous silicon/carbon dots composites were characterized by SEM, XRD, UV-vis and PL et al. At the same time, we have tested the electrochemical performance of porous silicon / carbon dots composites electrode. The results show that the fluorescence property of the composites is better than porous silicon and carbon dots. After the deposition of carbon dots, the photoluminescence intensity of porous silicon increased around 1.4 times and the decrease of luminescence efficiency of the complex is only around 6.8%. And it shows excellent broadband light reflectivity from 200nm to 700nm, consistently below 20%.