Chinese Optics Letters, 2018, 16 (7): 072501, Published Online: Jul. 19, 2018
Optical properties and dynamic process in metal ions doped on CdSe quantum dots sensitized solar cells Download: 582次
Abstract
In recent years, the nanostructure for solar cells have attracted considerable attention from scientists as a result of a promising candidate for low cost devices. In this work, quantum dots sensitized solar cells with effective performance based on a co-sensitized (or ) nanocrystal, which was made by successive ionic layer absorption and reaction, are discussed. The optical, physical, chemical, and photovoltaic properties of quantum dots sensitized solar cells were sensitized to and dopants. Therefore, the short current ( ) of the quantum dot sensitized solar cells is boosted dramatically from for pure CdSe nanoparticles to for ions and for ions. Actually, metal dopant extended the band gap of pure CdSe nanoparticles, reduced recombination, enhanced the efficiency of devices, and improved the charge transfer and collection. In addition, and dopants rose to the level of the conduction band of pure CdSe nanoparticles, which leads to the reduction of the charge recombination, enhances the light-harvesting efficiency, and improves the charge diffusion and collection. The results also were confirmed by the obtained experimental data of photoluminescence decay and electrochemical impedance spectroscopy.
Ha Thanh Tung, Dang Huu Phuc. Optical properties and dynamic process in metal ions doped on CdSe quantum dots sensitized solar cells[J]. Chinese Optics Letters, 2018, 16(7): 072501.