COPPER QUANTUM DOTS ON TIO2: A HIGH-PERFORMANCE, LOW-COST AND NONTOXIC PHOTOVOLTAIC MATERIAL
The surface decoration of TiO2 with Cu quantum dots (QDs) was carried out through a simple chemical deposition method. The Cu nanoparticles were attached tightly and highly dispersed onto the pre-sintered TiO2 surface. The results of X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations show that the lattice and surface morphology nearly have no change before and after the modification. While quantization size effect is evidenced from diffuse reflectance spectra (DRS), in which the response wavelength shifts from 380nm to 440nm, namely that the bandgap (Eg) of the decorated TiO2 is reduced from 3.26 eV to 2.82 eV. The amount of Cu detected by energy-dispersive X-ray spectroscopy (EDS) is much higher than the theoretical value, which demonstrates that the QDs exist on the surface of TiO2 and the sensitization of TiO2 by QDs is only a surface process.
quantum dots photovoltaic conversion titania copper
Qiong Sun Xianmiao Sun Hongzhou Dong Qian Zhang Liyan Yu Lifeng Dong
College of Materials Science and Engineering, Qingdao University of Science and Technology Qingdao, College of Materials Science and Engineering, Qingdao University of Science and Technology Qingdao,
国际会议
大连
英文
32-33
2012-05-28（万方平台首次上网日期，不代表论文的发表时间）