Lanzhou University professor Peng Shanglong's team used new charge-selective material modification, improved light absorption, silicon nano-trap structure, silicon surface passivation and silicon/metal interface contact resistance reduction strategies to improve solar cell conversion efficiency. Reduced costs. The results were published in Nano Energy.
Conventional silicon-based solar cells have high investment in hardware and equipment, which makes the cost of the battery high, which limits the large-scale application. The non-doped heterojunction solar cell is formed by using a novel charge-selective material and a crystalline silicon substrate. The high temperature process required for doping can be avoided, but such materials have low hole mobility, poor silicon contact surface properties, and high silicon/metal electrode contact resistance, which limits the conversion efficiency of the battery.
In response to these problems, the researchers introduced the reduced graphene oxide into the novel charge-selective material film to improve the conductivity and enhance the light absorption of the battery material. Through the design of the battery structure, zinc oxide was selected as an electron-selective material. The solar cell conversion efficiency exceeds 15%.
The related research results provide a new idea for the cost reduction of traditional silicon-based solar cells, which provides a possibility for its wide-scale promotion in the future.
