The paper presents a methodology for fabrication of low-costing silicon solar cells with an efficiency of 10%. A polycrystalline
silicon wafer, size 100×100 mm and thickness 450 μm, was doped with phosphorus using POCl3 as the dopant. While, the backside (p-side) of the wafer was printed with a paste of Ag+Al in the ratio of 25 : 1, the front side (n-side) was printed with a paste of silver. It was fired at 720°C for better ohmic contact. Chemical vapour deposition (CVD)
method was adopted for antireflection coating. Pure oxygen gas was bubbled through a solution of TiCl4 at 200°C. The fabricated cells gave a significant increase in efficiency in terms of open circuit voltage (V) 560 mV, short circuit current (I) of 2·7 amp, and fill factor of 0·73. The methods used are inexpensive, and suitable for production of efficient silicon
solar on a commercial basis. 相似文献
A dehydrogenative oxygenation of C(sp2) H bonds with intramolecular phenolic hydroxy groups has been developed, which provides a straightforward and concise access to structurally diversely benzofurans from ortho‐alkenylphenols. The reaction is catalyzed by palladium on carbon (Pd/C) without any oxidants and sacrificing hydrogen acceptors.