Lub siab tshaj plaws photovoltaic conversion efficiency ntawm ib qho - crystal silicon solar cells nce mus txog 24%, qhov siab tshaj plaws ntawm txhua hom hnub ci. Txawm li cas los xij, tus nqi tsim khoom siab ntawm ib leeg - siv lead ua silicon hnub ci tau tiv thaiv lawv txoj kev siv dav thiab dav. Polycrystalline silicon hnub ci hlwb yog pheej yig dua ib zaug xwb - crystal silicon solar cells nyob rau hauv cov nqe lus ntawm cov nqi ntau lawm, tab sis lawv cov photovoltaic conversion efficiency yog qis dua. Tsis tas li ntawd, lawv lub neej kev pabcuam kuj luv dua li ntawm ib zaug - crystal silicon solar cells. Yog li ntawd, nyob rau hauv cov nqe lus ntawm kev ua tau zoo- tus nqi piv, ib qho - siv lead ua silicon solar cells yog me ntsis zoo dua.
Cov kws tshawb fawb tau tshawb pom tias qee cov khoom siv semiconductor haum rau nyias -film hnub ci photovoltaic hloov dua siab tshiab. Piv txwv li, CdS thiab CdTe; III -V compound semiconductors: GaAs thiab AlP InP; nyias- zaj duab xis hnub ci hlwb ua nrog cov semiconductors pom tau zoo heev photovoltaic conversion efficiency. Semiconductor cov ntaub ntawv nrog gradient band khoob (lub zog sib txawv ntawm cov conduction band thiab valence band) tuaj yeem nthuav dav lub hnub ci nqus spectrum, yog li txhim kho photovoltaic conversion efficiency. Qhov no nthuav tawm qhov kev cia siab dav dav rau kev siv dav dav ntawm nyias - zaj duab xis hnub ci. Ntawm cov khoom siv hluav taws xob ntau{-element semiconductor, Cu(In, Ga)Se2 yog ib qho zoo heev hnub ci absorber. Raws li nws, nyias- zaj duab xis hnub ci tuaj yeem tsim nrog kev hloov pauv hluav taws xob ntau dua li cov silicon nyias- zaj duab xis hnub ci, thiab photoelectric conversion efficiency uas tuaj yeem ua tiav yog 18%.
