Ib pab neeg tshawb fawb coj los ntawm xibfwb Anita Ho-Billie, John Hooke Chair ntawm Nanoscience ntawm University of Sydney hauv Australia, tau teeb tsa lub hnub ci thev naus laus zis tshiab rau lub ntiaj teb loj tshaj peb npaug -txoj kev perovskite-perovskite- silicon tandem hnub ci cell.
Lawv qhov ntev yog 16 cm2triple-hluav taws xob ntawm tes muaj qhov ruaj khov- lub xeev lub zog hloov pauv kev ua haujlwm ntawm 23.3% (tso ntawv pov thawj ywj pheej), uas yog qhov siab tshaj plaws tshaj tawm rau qhov loj - thaj chaw ntaus ntawv ntawm nws hom. Nws pab neeg kuj tsim ib tug 1-cm2cell nrog 27.06% kev ua tau zoo, uas tsim cov qauv tshiab thermal stability (saib video).
Lub laub rau kev ua haujlwm tau zoo yog tsav los ntawm "lub taub hau loj dua rau kev hloov pauv hluav taws xob ua haujlwm zoo-vim qhov kev siv theoretical efficiency txwv rau kev sib tshuam triple yog ~ 51%, thaum rau ob qhov kev sib tshuam nws nyob ib puag ncig 45%, "hais tias Ho-Billie, uas tseem koom nrog University of Sydney's Net Zero Institute. "Ib qho kev sib tshuam yog 33% yog tias qhov bandgap ntawm lub hnub ci cell tsis txwv, tab sis tsuas yog 30% rau silicon."
Multijunction tandem solar cells koom nrog stacking solar cells nrog cov bandgaps sib txawv -nrog siab tshaj ntawm lub hnub-fab side- kom cia txhua lub cell hloov cov seem ntawm hnub ci spectrum rau hluav taws xob hluav taws xob zoo dua thiab txo qis qis -bandgap thiab thermalization poob.
"Hauv ob-hluav taws xob, piv txwv li, sab saum toj dav-bandgap hlws ris hloov dua siab tshiab photon zog rau hluav taws xob hluav taws xob thiab ua kom nws ua tau zoo dua li qhov kev sib tshuam bandgap nqaim dua- uas txo cov thermalization poob," piav qhia Ho-Baillie. "Qhov qis-zog photon dhau los ntawm qhov dav saum toj kawg nkaus-bandgap hlws ris thiab yuav nqus los ntawm qhov nqaim bandgap hauv qab kev sib tshuam rau hluav taws xob hloov hluav taws xob. Yog tias qhov txuas hauv qab tsis nyob ntawd, qhov qis dua -zog photons ua rau sub-bandgap nonabsorption poob."
Optical designs
Txhawm rau ua piv txwv cov qauv tsim kho qhov muag cuam tshuam, pab pawg sab saum toj ob lub perovskite junctions yog hluav taws xob sib txuas los ntawm kub nanoparticles. "Peb siv optical modeling los simulate cov nyhuv ntawm nanoparticle coverage ntawm optical poob, thiab hluav taws xob qauv los simulate lub ohmic hu ua los ntawm nanoparticle," piav qhia Ho-Billie. "Ib qho nyiaj tshuav raug ntaus thaum muaj tus naj npawb txaus ntawm nanoparticles tam sim no rau qhov tsawg kawg nkaus qhov muag tsis muaj kev cuam tshuam hluav taws xob ua haujlwm."
Ho-Billie's pab neeg kuj tau txhim kho kev ruaj ntseg thiab kev ua tau zoo ntawm qhov dav bandgap (1.91-eV) perovskite hlws ris los ntawm "hloov rubidium nrog cov methylammonium tsis tshua muaj zog nyob rau hauv perovskite thiab hloov piperazinium-dichloride (PDCI) nrog cov txheej txheem lithium fluorating tsawg dua."
Ho-Baillie qhov mob siab rau xav pom cov kub ultrathin tau them tiag tiag. Nws hais tias "Yuav tsum muaj qhov tseem ceeb ntawm cov nyiaj kub rau pawg los tsim ua ntej ua ib zaj yeeb yaj kiab ib nrab," nws hais. "Ntau kub yuav ua kom cov yeeb yaj kiab tsis tu ncua kom loj hlob. Hauv qab qhov 'cluster' qhov tseem ceeb, kub yuav nyob rau hauv daim ntawv ntawm nanoparticles. Qhov ua rau peb qhov kev tshawb pom nthuav yog tias cov yeeb yaj kiab - txuas ntxiv lossis tsis tas li- tsis tas yuav txuas ob qhov sib txuas. nanoparticles, txawm tias cais, txaus rau ohmic kev sib cuag ntawm qhov sib txuas ntawm qhov sib txuas ntawm qhov sib txuas ntawm qhov sib txuas ntawm qhov sib txuas ntawm qhov sib txuas ntawm 8. poob."
Cov ntaub ntawv kev ua tau zoo no txhais li cas rau daim teb? "Peb qhov kev ua qauv qhia muab kev nkag siab txog cov khoom tseem ceeb rau kev txhim kho kev ua tau zoo yav tom ntej," Ho-Billie hais. "Kev ntsuam xyuas poob tseem muab cov lus pom zoo rau kev txhim kho kev ua haujlwm yav tom ntej- ob qho tib si rau me- thiab loj- cov khoom siv hauv cheeb tsam. Tom ntej no: A 30% triple junction, thawb mus rau 40%.
Pab pawg ua haujlwm tau koom nrog cov koom tes los ntawm Tuam Tshoj, Lub Tebchaws Yelemees, thiab Slovenia, thiab tau txais kev txhawb nqa los ntawm Australian Renewable Energy Agency thiab Australian Research Council.
