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(dòng)機(jī).不透明度測(cè)量?jī)x器和廢氣吸光系數(shù)測(cè)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(shí) , > 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(shí), > 5 10 ~ 5cm ~ - 1 )的半導(dǎo)體材料,其組元元素儲(chǔ)量十分豐富、無(wú)毒,而且在制備太陽(yáng)能電池時(shí)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?jī)r(jià)值的太陽(yáng)能電池材料。