| Abstract [eng] |
Inorganic layers deposited onto substrate, such as glass, plastic or metal, are widely used in photovoltaic devices. Second generation solar cells, in which thickness of active layer range from a few nanometers to several micrometers, have such benefits as elasticity and low weight. Nowadays, the highest efficiency is achieved by using CdTe or (Cu(In,Ga)Se2) solar cells. These layers are associated with toxic elements release into atmosphere, limitation of raw materials and complicated methods of layer formation. Due to this, it is really important to search new materials and simpler method. Tin selenide is one of potential material for application in solar cell, because it has suitable optical and electrical properties, also it is non-toxic. In this project, tin selenide layers are formed onto polyamide 6 substrate. Tin selenide layers are deposited by using simple and cost-efficiency adsorption-diffusion method. Also, it was investigated how different dopants of metal ions change primary tin selenide properties. There are three stages of this method. Firstly, polyamide 6 sheets are immersed into precursor solution of selenium ions. Secondly, selenized PA 6 sheets are immersed into precursor solution of tin (II) ions. Finally, polyamide 6 sheets with tin selenide layer are doped with different metal ions. Silver, gallium, indium, copper ions could easily enter into primary tin selenide layer by using adsorption-diffusion method. Silver and copper ions diffuse into tin selenide layer the most easily. All layers were affected by layer formation conditions such as concentration of precursor solutions, pH value, temperature, time of process. Metal ion incorporation into primary tin selenide layer changed its band gap value. Silver ions decreased band gap value, copper, gallium and indium – increased. Metal ions also affected thickness of layers. Higher concentration of metal additives resulting in formation of a thicker layer. |
