 |
Photovoltaic stability of flexible silicon-based solar cells under different bending times
Recently, the research team of Ye Changhui, a researcher at the Department of Micro-nano Technology and Devices of the Institute of Solid State Physics, Chinese Academy of Sciences, has made new progress in the research of flexible monocrystalline silicon micro-nanostructured solar cells. The relevant results were published in the form of a cover paper. Nanores. 2015, 8(10), 3141-3149.
The crystalline silicon solar cell has become the most popular solar cell by virtue of its mature preparation process and high photoelectric conversion efficiency, but the inherent rigid structure of the monocrystalline silicon substrate has limited its use in building integration and wearable Applications in electronic products. Flexible monocrystalline silicon-based solar cells have characteristics such as light weight, low cost, and foldability, which are of great significance for practical applications.
The Solids Research Group has developed a technology for thinning monocrystalline silicon wafers. Using a simple manufacturing process, a flexible silicon pyramid micro/nanostructure/PEDOT:PSS solar cell with a photoelectric conversion efficiency of 6.3% was constructed. Experimental tests have shown that, after various times of mechanical bending (bending angle of 800), the photovoltaic device characteristics such as open circuit voltage, short-circuit current, and fill factor of the battery exhibit excellent stability (the change rate is less than 10%). It lays the foundation for the practical application of next-generation portable electronic devices for flexible silicon-based solar cell devices. The above research was funded by the Ministry of Science and Technology's "973 Program", the National Natural Science Foundation of China, the Chinese Academy of Sciences 100-person plan and the Chinese Academy of Sciences International Innovation Team project.
Stop Valves are closed by screwing a rubber gasket down onto a seat in the middle of the valve. Pros only use small versions that act as shutoff valves for fixtures such as sinks and toilets and outdoor sillcocks. Flow is inefficient because of the circuitous route the fluid (water, in most cases) has to follow. It's important to orient the valve in the right direction with the arrow (cast into the side of the valve) aligned with flow direction. That way, water flows against the bottom of the rubber gasket. If the valve is put in backward, the flow will force the gasket away from the top of the valve.
Stop Valves, Shower Stop Valve, Water Stop Valves, Brass Stop Valve
ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsir-valves.com