Hnub Ci Vaj Huam Sib Luag Lub Teeb Absorption Band Range
Hnub ci vaj huam sib luag tau dhau los ua neeg nyiam nyob rau xyoo tas los no. Lawv yog cov nqi-zoo, ib puag ncig-phooj ywg, thiab rov ua dua tshiab ntawm lub zog. Hnub ci vaj huam sib luag hloov lub hnub ci rau hauv hluav taws xob los ntawm kev siv cov khoom tshwj xeeb hu ua lub hnub ci cell. Lub hnub ci cell yog ua los ntawm cov ntaub ntawv sib txawv uas tuaj yeem nqus cov wavelengths sib txawv ntawm lub teeb.
Lub teeb Absorption nyob rau hauv Mono-crystalline Silicon Solar Cells
Mono-crystalline silicon yog cov khoom siv hnub ci ua haujlwm siab. Nws muaj qib purity siab thiab cov qauv siv lead ua zoo sib xws, uas tso cai rau kev txav mus los ntawm electron zoo dua. Mono-crystalline silicon solar cells feem ntau muaj lub teeb haum ntawm 300 - 1100 nm, nrog lub ncov nqus tsev nyob ntawm thaj tsam 780 nm. Qhov no txhais tau hais tias lub hnub ci hlwb tuaj yeem nqus tau feem ntau ntawm cov teeb pom kev zoo, nrog rau qee qhov ze-infrared teeb.
Txawm li cas los xij, muaj qhov pom kev poob qis hauv kev nqus tau tshaj 1100 nm. Qhov no yog vim lub fact tias mono-crystalline silicon yog ib tug indirect bandgap khoom. Indirect bandgap cov ntaub ntawv muaj lub zog ntau dua rau cov hluav taws xob txav los ntawm valence band mus rau qhov conduction band. Qhov no txhais tau hais tias photons nrog qis zog tsis tuaj yeem nqus tau zoo los ntawm cov khoom siv. Yog li ntawd, mono-crystalline silicon solar cells tsis muaj peev xwm nqus tau qhov tseem ceeb ntawm lub teeb ntev-yoj (qis zog) lub teeb.
Lub teeb Absorption nyob rau hauv nyias zaj duab xis Silicon Solar Cells
Nyias zaj duab xis silicon hnub ci hlwb yog ua los ntawm ntau txheej ntawm silicon nrog txawv thicknesses thiab dopants. Lawv feem ntau pheej yig dua los tsim dua li mono-crystalline silicon solar cells. Lub teeb nqus ntau yam ntawm nyias zaj duab xis silicon solar cells txawv ntawm cov mono-crystalline silicon solar cells. Nyias zaj duab xis silicon absorbs lub teeb nyob rau hauv ib tug dav dav ntawm wavelengths, tshwj xeeb tshaj yog nyob rau hauv thaj tsam ntawm 400 - 800 nm. Qhov no txhais tau hais tias lawv tuaj yeem nqus tau feem ntau ntawm cov teeb pom kev zoo, tab sis tsis ntau npaum li lub teeb ze-infrared li mono-crystalline silicon.
Nyias zaj duab xis silicon hnub ci hlwb tuaj yeem muab faib ua peb hom: amorphous silicon (a-Si), micro-crystalline silicon (μc-Si), thiab nano-crystalline silicon (nc-Si). Txhua hom muaj qhov sib txawv bandgap thiab nqus tau ntau yam. Amorphous silicon muaj qhov sib txawv ntawm li 1.7 eV thiab tuaj yeem nqus lub teeb nyob rau hauv thaj tsam ntawm 300 - 800 nm. Micro-crystalline silicon muaj qhov sib txawv ntawm li 1.3 eV thiab tuaj yeem nqus lub teeb hauv thaj tsam ntawm 400 - 700 nm. Nano-crystalline silicon muaj qhov sib txawv ntawm 2.0 - 2.2 eV thiab tuaj yeem nqus lub teeb nyob rau hauv thaj tsam ntawm 300 - 600 nm.
Nyob rau hauv xaus, mono-crystalline silicon hnub ci hlwb muaj lub ncov nqus band nyob ib ncig ntawm 780 nm thiab tuaj yeem nqus tau feem ntau ntawm cov teeb pom kev zoo nrog rau qee qhov ze-infrared teeb. Nyias zaj duab xis silicon hnub ci hlwb, ntawm qhov tod tes, muaj kev nqus dav dua li mono-crystalline silicon, tab sis tsis ntau npaum li lub teeb ze-infrared. Qhov tshwj xeeb haum thiab kev ua haujlwm yog nyob ntawm hom nyias zaj duab xis silicon. Txawm li cas los xij ntawm lub hnub ci cell, lub hnub ci vaj huam sib luag muab lub zog ruaj khov thiab rov ua dua tshiab. Nrog rau kev nce qib ntxiv hauv thev naus laus zis, lub hnub ci vaj huam sib luag yuav muaj peev xwm muab lub zog ntau dua nrog kev ua haujlwm ntau dua.