Lanzhou University professor Peng Shanglong's team has adopted new charge-selective material modification, improved light absorption, construction of silicon nano-light trapping structure, silicon surface passivation and reduction of silicon / metal interface contact resistance, etc. Reduced costs. The result was published in "Nano Energy" a few days ago. The traditional silicon-based solar cell has a complicated preparation process and a high investment in hardware equipment, which makes the battery cost high and limits large-scale applications. The use of novel charge selective materials and crystalline silicon substrates to form undoped heterojunction solar cells can avoid the high-temperature process required for doping, but such materials themselves have low hole mobility and poor silicon contact surface performance, and There are problems such as high contact resistance of silicon / metal electrodes, which limits the improvement of battery conversion efficiency. In response to these problems, the researchers introduced reduced graphene oxide into the thin film of a new type of charge-selective material to improve conductivity and enhance light absorption of battery materials. Through the technical improvement of the design of the battery structure and the selection of zinc oxide as an electronic selective material, the conversion efficiency of the solar cell exceeds 15%. The related research results provide new ideas for reducing the cost of traditional silicon-based solar cells, and provide the possibility of large-scale promotion in the future. Swing Fountain,Graphic Waterfall Fountain,Water Features,Outdoor Garden Fountain Guangzhou Dewy water fountain Technology Co., LTD , http://www.dewywaterfountain.com