Tau qhov twg los: www.wevolver.com
Cov kws tshawb fawb tau tsim cov tshuaj txhuam ua los ntawm titanium dioxide thiab resonant silicon nanoparticles uas ua cov txheej ntxiv hauv txheej txheem tsim cov hnub ci cell. Mie-resonant hais nyob rau hauv qhov muab tshuaj ua rau nws muaj peev xwm tswj tau qhov pom ntawm lub teeb nqus thiab ua kom cov photocurrent tsim tau ntau ntxiv, uas tso cai rau cov kws tshawb fawb coj qhov ua tau zoo ntawm lub hnub ci cell mus txog 21%. Ib qho tseem ceeb, kev sim tau ua ntawm halide (MAPbI3) perovskites, uas yog qhov dav tshaj plaws thiab kawm tau zoo hauv thaj tsam ntawm photovoltaics.
Cov ntaub ntawv muaj
Halide perovskites yog qee yam ntawm cov ntaub ntawv cog lus tshaj plaws nyob rau niaj hnub photovoltaics, txawm li cas los xij lawv muaj ib qho teeb meem tseem ceeb: lawv txheej txheej tsis zoo tsuas yog txog 300-600 nanometers. Cov txheej nyias nyias tsis tuaj yeem nqus tag nrho cov teeb pom kev, tab sis tib lub sijhawm lawv tsis tuaj yeem ua tuab dua - tom qab ntawd, lub teeb yuav tawg ntau dua ua rau lub zog poob.
Ib ntawm ob lub tswv yim tuaj yeem siv los txhawb kev ua haujlwm zoo ntawm perovskite-based solar cells: txhim kho kev sau nqi lossis nce lub teeb nqus. Thawj lub tswv yim xav kom siv cov txheej txheem perovskite ntau dua thiab qhia cov tshuaj ntxiv (feem ntau, tsis tshua muaj hlau), ntxiv rau feem ntau ua rau cov qauv tsis yooj yim. Lawm, qhov no ua rau nce nqi hauv kev tsim khoom. Cov kws tshawb fawb los ntawm ITMO University ua ke nrog cov npoj yaig los ntawm Tsev Kawm Ntawv Tor Vergata tau mus ncig qhov teeb meem no los ntawm kev ua kom pom lub teeb nyob hauv lub hnub ci. Ntxiv mus, lawv cov kev daws teeb meem siv silicon, ib qho ntawm cov khoom siv tau zoo tshaj plaws hauv qhov.
"Peb tuaj yeem tau txais silicon los ntawm cov xuab zeb, yog li yuav luag tsis muaj qhov kawg ntawm cov khoom siv no. Nws yuav yog qhov kev daws teeb meem coj txawv txawv kom yooj yim qhia silicon rau hauv cov qauv perovskite, tab sis nws tuaj yeem qhia ua nanoparticle. Xws li cov khoom siv ua nanoantennae - lawv ntes lub teeb thiab nws resonates hauv lawv. Thiab lub teeb nyob ntev dua nyob rau hauv txheej txheej tsis zoo, ntau ntawm nws tau nqus los ntawm cov khoom siv, "piav qhia, xibfwb ntawm ITMO Tsev Kawm Ntawv ntawm Physics thiab Engineering.
Aleksandra Furasova thiab Sergey Makarov. Yees duab los ntawm Ekaterina Shevyreva, ITMO.NEWS
Cov lus teb kom raug
Qhov ua kom yuam kev yog tias silicon nanoparticles ntawm qhov ntau thiab tsawg yog Mie-resonant. Ua tsaug rau cov txiaj ntsig no, nanoparticles tuaj yeem nthuav dav ntau yam kev pom tshwm sim, suav nrog kev nqus lub teeb thiab hluav taws xob tshwm sim. Hauv lwm lo lus, lawv ua haujlwm zoo li nanoantennae. Txawm li cas los xij, txhawm rau siv cov cuab yeej no, cov kws tshawb fawb yuav tsum ua qhov kev xav theoretical hnyav thiab tsim qauv uas suav txog cov khoom siv hluav taws xob thiab kho qhov muag ntawm txhua txheej thiab nanoparticles thaum lawv raug hluav taws xob sab nraud thiab qhov hluav taws xob.
Cov nanoparticle muab tshuaj txhuam tsim los ntawm cov kws tshawb fawb. Yees duab los ntawm Ekaterina Shevyreva, ITMO.NEWS
Qhov haujlwm tseem ceeb thib ob thiab nyuaj ntawm txoj haujlwm yog txheeb xyuas qhov chaw zoo tshaj plaws rau kev tsim cov tshuaj txhuam. Cov hnub ci cell tau tsim los siv cov txheej txheej txheej, thaum cov txheej txheej ua kua tau ua ntu zus los ntawm ib leeg. Qhov no ua rau nws muaj peev xwm los tsim cov yeeb yaj kiab nyias nyias ntawm kev sib txawv ntawm cov tuab thiab cov ntsiab lus. Ntxiv mus, xyaum ua lwm yam ntaub ntawv thiab tshuaj ntxiv tuaj yeem ntxiv rau cov yeeb yaj kiab thaum lub sijhawm tsim khoom.
Kev tsim tawm ntawm perovskite cell nrog nanoparticle muab tshuaj txhuam. Yees duab los ntawm Ekaterina Shevyreva, ITMO.NEWS
"Nrog cov txheej txheem kua peb tuaj yeem yooj yim faib tawm qhov ntau ntawm cov nanoparticles qhuav hauv kev daws teeb meem. Qhov peb yuav tsum tau txiav txim siab yog nyob hauv txheej twg peb yuav tsum tso Mie-resonant hais. Yog tias muab tso rau hauv txheej perovskite, lawv yuav ua rau nws thaj chaw tsis zoo. Yog tias lawv yuav tsum tau muab tso rau hauv txheej txheej thauj mus los, lub teeb yuav feem ntau tau nqus los ntawm lub sijhawm nws mus txog nanoparticles hla txhua txheej hauv qab lawv. Tias yog vim li cas peb tso cov nanoparticles nyob hauv txheej tom ntej tom qab perovskite - txoj hauv kev no lawv tau ze dua rau lub teeb ci thiab ua haujlwm raws li lub kav hlau txais xov kom muaj txiaj ntsig ntau dua, "hais tias Aleksandra Furasova, thawj tus sau ntawm daim ntawv thiab cov kws tshawb fawb qib qis koom nrog ITMO Tsev Kawm Ntawv ntawm Physics thiab Engineering.
Kev tsim tawm ntawm perovskite cell nrog nanoparticle muab tshuaj txhuam. Yees duab los ntawm Ekaterina Shevyreva, ITMO.NEWS
Tshuab yooj yim
Kev tsim tshuaj txhuam yog ib qho yooj yim mus thov thiab tuaj yeem siv nrog lub hnub ci ntawm ib qho kev sib xyaw thiab teeb tsa. Nyob rau tib lub sijhawm, tsis muaj teeb meem ntxiv rau cov txheej txheem tsim khoom, thaum tus nqi ntawm cov khoom siv tau nce ntxiv tsuas yog 0.3%.
"Qhov muab tshuaj txhuam tuaj yeem siv tau yooj yim nrog rau lwm txoj hauv kev, tsis yog nrog txheej txheej. Nws yog cov khoom lag luam thoob ntiaj teb uas tuaj yeem siv rau lwm hom ntawm lub hnub ci cell, nrog rau hauv kev tsim khoom ntawm ntau yam khoom siv - photodetectors, sau qoob, thiab optoelectronics. Xws li kev tsim khoom kuj tseem muaj kev nyab xeeb ib puag ncig, vim peb tsis siv cov ntaub ntawv uas tsis tshua muaj. Raws li qhov tshwm sim, peb tau tsim kho cov thev naus laus zis zoo heev thiab peb ntseeg tias cov khoom lag luam yuav siv tau thoob ntiaj teb thiab nrhiav tom qab, "xaus Sergey Makarov.
