Reciprocating internal combustion compression - ignition engines - apparatus for measurement of the opacity and for determination of the light absorption coefficient of exhaust gas 往復(fù)式壓燃式內(nèi)燃發(fā)動機.不透明度測量儀器和廢氣吸光系數(shù)測定儀器
Fes _ 2 ( pyrite ) has been considered as a valuable semiconductor for solar energy conversion and other photoelectrochemical applications since it consists of nontoxic and abundant elements . because of the band gap of about 0 . 95ev and the very high light absorption coefficient ( < 700nm 時 , > 5 10 ~ 5cm ~ - 1 ) , it might be suitable for sensitization solar cells and in the form of ultrathin films Fes _ 2 ( pyrite )是一種具有合適禁帶寬度( e _ g 0 . 95ev )和較高光吸收系數(shù)( < 700nm時, > 5 10 ~ 5cm ~ - 1 )的半導(dǎo)體材料,其組元元素儲量十分豐富、無毒,而且在制備太陽能電池時可以以薄膜形式使用,成本較低,與已有半導(dǎo)體材料相比,是一種較有研究價值的太陽能電池材料。