Dye Sensitization Ntawm Solar Cells Yooj Yim

Thaum ntxov li 1970s, tib neeg cia siab tias yuav tsim lub hnub ci tshiab los ntawm simulating photosynthesis. Lub sijhawm ntawd, tib neeg tau qhwv ib txheej ntawm chlorophyll dye rau saum npoo ntawm cov khoom siv lead ua semiconductor titanium dioxide (TiO2). Txawm hais tias lub tswv yim ntawm dye sensitized solar cell (DSC) tau npaj tseg, vim qhov nyuaj ntawm kev thauj hluav taws xob hauv chlorophyll, qhov kev hloov pauv tau tsuas yog 0.01 feem pua.
Nws tsis yog txog xyoo 1991 uas Swiss chemist Michael Gratzel siv nanotechnology los txhawb txoj kev loj hlob ntawm cov roj teeb sensitized dye sensitized. Gratzel hloov cov khoom loj ntawm TiO2 muaju nrog cov khoom me me ntawm spongy TiO2 nrog txoj kab uas hla ntawm 20 nm. Cov txheej txheej txheej yog coated nrog ib txheej nyias ntawm dye, tsim 10 um tuab optical pob tshab zaj duab xis. Thawj dye sensitized roj teeb ua tau tiav ib tug conversion efficiency ntawm 7.1 feem pua ​​thiab ib tug tam sim no ceev ntawm 12 mA / cm ^ 2. Niaj hnub no, lub ntiaj teb no cov ntaub ntawv rau cov conversion efficiency ntawm dye sensitized roj teeb yog 11 feem pua.
Nyob rau hauv cov qauv ntawm cov roj sensitized cell, photosensitizers yog coated rau saum npoo ntawm TiO2 hais los ntawm kev ua hauj lwm pab pawg neeg ntawm carboxyl (- COOH), phosphoric acid (- PO3H2), los yog boric acid - B (OH) 2 los tsim ib tug nqi hloov complex. . Tom qab ntawd lawv muab tso rau hauv ib qho kev daws teeb meem redox, nrog TCO iav thiab hlau substrates ua cathodes thiab anodes, feem. Cov photosensitizer absorbs emitted lub teeb, thiab cov electrons nyob rau hauv Yog li ntawd nyob rau hauv lub hauv av xeev zoo siab rau lub high-zog lub xeev S *. Nyob rau hauv fs rau ps, cov electrons nyob rau hauv lub photosensitizer nkag mus rau lub conduction band ntawm TiO2. Cov photosensitizer poob electrons, yog oxidized, thiab dhau los ua S ntxiv. Lub redox mediator tau txais cov khoom siv hluav taws xob los ntawm cov hlau anode, thiab tom qab ntawd muab cov hluav taws xob rau cov photosensitizer kom txo tau lawv. Cov electrons dawb ntawm cov conduction band ntawm So. TiO2 rov qab mus rau cov hlau anode los ntawm TCO cathode thiab circuit. Ib qho tam sim no yog tsim los ntawm ob lub electrodes los tsav lub load hauv Circuit Court.
Cov lus ceeb toom ntawm Kev Hloov Kho Hnub Ci
Nyob rau lub Peb Hlis 2016, kuv tus kws tshawb fawb tau tsim ib hom tshiab ntawm lub hnub ci hloov tau yooj yim, uas cov kws tshaj lij ntseeg tias yuav tsum tau siv los tsim cov ntsuas kub tswj lub hnub ci thiab cov hnub ci uas siv tau.