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Hybrid Solar Cells Muaj Cov Ntawv Sau Rau Hauv Cov Khoom Uas Muaj Zog Thiab Portable
Nov 03, 2018

To taub qhov kev cuam tshuam ntawm qhov tsis xws luag yog underpins qhov kev ua tau zoo dua ntawm cov kab mob organic / tsis muaj zog hauv lub nruab hnub.

               Hybrid solar cells siv ib qho kev sib txuas ntawm cov txheej ntawm cov organic thiab inorganic cov ntaub ntawv los hloov hnub ci rau hauv hluav taws xob. Zinc oxide (ZnO) yog qhov kev xaiv nrov rau cov khoom siv hauv cev vim tias nws yog pheej yig, tsis muaj kuab lom thiab nkag tau yooj yim.

Txawm li cas los xij, qhov kev hloov dua siab ntawm kev siv lub nruab hnub nruab nrab ntawm ZnO / organic-donor heterojunctions yog qhov tsawg kawg nkaus - tsawg 2 feem pua thaum ZnO tau muab tso rau hauv cov khoom siv organic. Ntawm qhov tod tes, ib qho zoo sib xws 6.1 feem pua ntawm kev ua tau tiav lawm thaum ZnO siv los ua ib txheej sandwiched ntawm ib qho electrode thiab ib txheej ntawm polymer los yog cov neeg tsawg-cov khoom txais me.

Jean-Luc Bredas los ntawm KAUST Hnub Ci & Photovoltaics Engineering Research Centre thiab colleague Hong Li neeg phem ntawd intrinsic teem meem nyob rau hauv ZnO yog ib qho tseem ceeb nyob rau hauv cov neeg pluag kev ua tau zoo. Los ntawm kev sib piv hauv cov khoom sib txawv ntawm ntau yam khoom siv sib xyaw, lawv xaus tias zinc vacancies txo conversion efficiency by hindering tus nqi sib cais ntawm tus interface ntawm cov khoom siv organic thiab inorganic.

Nws yog zoo paub tias ZnO adopts ntau tus cwj pwm hauv tej heterojunctions nyob ntawm seb hom organic khoom thiab architecture siv. Thaum muab nrog polymer los yog cov neeg hloov me me ua piv txwv xws li sexithienyl, ZnO xav txog lub luag hauj lwm ntawm tus electron acceptor: nws yuav siv los yog "lees txais" electrons thiab yoojyim them qhov tom qab hauv sexithienyl txheej.

Thaum qhaub cij ntawm tus electrode thiab ib tus txheej txheem fullerene acceptor, ZnO pab hloov cov electrons ntawm tus txheej txheem fullerene mus rau electrode. Cov txheej txheem no yuav pab tau qhov hloov ntawm lub hnub ci rau hauv hluav taws xob.

Cov neeg tshawb xyuas siv computer simulations los kuaj xyuas seb cov zinc seem li cas ntawm qhov zinc oxide cov teeb meem ntawm ob txoj kev. Rau ZnO / sexithienyl bulk heterojunction, zinc vacancies nyob rau ZnO ntws tuaj yeem tabtom hauv lub zos hloov ntawm ZnO / sexithienyl interface thiab tuaj yeem tiv thaiv kev sib cais kom sib txawv vim muaj zog Coulomb kev sib tshuam. Txawm li cas los xij, rau cov ZnO / fullerene interface, kev tsis txaus siab yuav tsis cuam tshuam qhov nqi hloov txheej txheem.

Rau cov laj thawj no, ZnO / organic heterojunctions tsim kom deb li deb tau yog qhov muaj tseeb. Hauv kev sib piv, Txawm li cas los xij, zinc tu siab muaj feem cuam tshuam txog ZnO / sexithienyl dua li ntawm ZnO / fullerene interfaces. Cov txiaj ntsim tau muaj kev cuam tshuam rau kev tsim cov qoob loo nruab hnub, uas muaj cov ntawv sau hauv cov khoom siv hluav taws xob thiab cov khoom siv tau txav.

"Qhov peb kawm tau los ntawm peb qhov kev tshawb fawb yog qhov twg qhov teeb meem ntawm qhov ua rau cov hlau oxides zoo ib yam li ZnO txiav txim tag nrho cov khoom hluav taws xob thiab tag nrho cov cuab yeej siv tau," noted Bredas. Nws pom tias cov kev tshawb pom qhia tau txoj hau kev los txhim kho hnub ci ntawm tes los ntawm qhov kev hloov kho deg.