Application Of Silver Nanoparticle Plasma On Amorphous Silicon Thin Film Solar Cells

This paper is divided into two parts, and the first part is the preparation of silver nanoparticles (Ag NPs) and characterization of morphology and light scattering properties. Metal nanoparticles plasma is one research area of common interest, which can improve thin-film silicon in light, and silver nanoparticles plasma can provide amorphous silicon thin-film batteries with excellent optical performance. We will adopt the method of magnetron sputtering to silver silver sputtering target material to stainless steel substrate, forming a silver nano film layer. Then we use tube furnace for annealing treatment, through the high temperature, the silver film metal particles are formed by self-assembly array. This method is simple in process, and the cost is low, which is the commonly used method for the preparation of metal nanoparticles. By changing the temperature and the thickness of the silver nano layer to adjust the morphology of silver nanoparticles, we can control the effect of plasma enhanced light scattering. The second part is the silver nanoparticles, which can be applied to amorphous silicon thin film solar cells on the back electrode, so as to improve the efficiency of the battery. Through the regulation of different annealing temperatures and different thickness of silver nanoparticle layer under the condition of the preparation of silver nanoparticles back reflector, they can form the short circuit current density (Jsc) and the photoelectric conversion efficiency (eff.) of battery performance parameters on the reflector and the sedimentary p-i-n single section of amorphous silicon thin film solar cells, such as what kind of annealing process can be better to increase back reflector light effect, compared to others.A remarkable gain of 3.81 mA/cm2 in the short-circuit current density (Jsc) has been obtained without significant deterioration of open circuit voltage (Voc) or fill factor (FF) for the a-Si-solar cells using the plasmonic BR in comparison with the one using the specular BR. Embedded in the experiments, back electrode self-assembly of silver nanoparticles can achieve strong light scattering and lower parasitic absorption effect, creating excellent luminous efficiency. Plasma can have back reflector in the spectral range of 600-1100 nm to provide up to 70% of the diffuse reflectance. Plasma back reflector's high performance is the result of the improvement of self-assembly technology, getting a higher back reflector's surface roughness and ideal size and distribution of silver nanoparticles. Through the analysis, the conclusions are summarized as follows:(1) Through (FE-SEM) characterization of field emission electron microscope, we found that with the increase of annealing temperature or silver nano layer's thickness, the size of the silver nanoparticles will gradually increase.(2) Plasma back reflector's diffuse characterization results show that as the increase of annealing temperature, the scattering performance may have optimum value at a certain temperature.(3) By comparing the performance parameters of plasma cell, the annealing temperature of the optimal annealing process is found to be 300?, and when silver nano layer's thickness is 15 nm and the battery short circuit current reaches 14.49 mA/cm2, the best performance is achieved, with the efficiency of 8.89%.