Pali chiyembekezo chowonjezera mphamvu zamapulogalamu apamwamba a silicon solar

Si chinsinsi kuti mapanelo a solar otchuka a silicon ali ndi malire momwe amasinthira kuwala kukhala magetsi. Izi zili choncho chifukwa fotoni iliyonse imagwetsa elekitironi imodzi yokha, ngakhale mphamvu ya tinthu tating'onoting'ono imatha kukhala yokwanira kutulutsa ma elekitironi awiri. Mu kafukufuku watsopano, asayansi a MIT akuwonetsa kuti malire ofunikirawa amatha kugonjetsedwera, ndikutsegulira njira ya ma cell a solar a silicon ndikuchita bwino kwambiri.

Kuthekera kwa fotoni kugwetsa ma elekitironi awiri kunali koyenera zaka 50 zapitazo. Koma zoyeserera zoyamba zopambana zidapangidwanso zaka 6 zapitazo. Kenako, selo la dzuwa lopangidwa ndi zinthu zachilengedwe linagwiritsidwa ntchito ngati kuyesa. Zingakhale zokopa kupita ku silicon yogwira ntchito kwambiri komanso yochuluka, zomwe asayansi akwanitsa kuzikwaniritsa chifukwa cha ntchito yochuluka kwambiri.

Pomaliza kuyesa adakwanitsa kupanga cell ya silicon solar, malire ongoyerekeza omwe adawonjezedwa kuchokera ku 29,1% mpaka 35%, ndipo izi si malire. Tsoka ilo, chifukwa cha izi, selo la dzuwa linayenera kupangidwa ndi zinthu zitatu zosiyana, kotero mu nkhani iyi ndizosatheka kudutsa ndi silicon monolithic. Akasonkhanitsidwa, selo la dzuwa ndi sangweji yopangidwa ndi zinthu zakuthupi. tetracene mu mawonekedwe a filimu pamwamba, thinnest (maatomu angapo) filimu ya hafnium oxynitride ndipo, kwenikweni, silicon wafer.

Chosanjikiza cha tetracene chimatenga photon yamphamvu kwambiri ndikusintha mphamvu zake kukhala zokopa ziwiri zosokera mu wosanjikiza. Izi ndi zomwe zimatchedwa quasiparticles zosangalatsa. Njira yolekanitsa imadziwika kuti singlet exciton fission. Pakuyerekeza movutikira, ma excitons amakhala ngati ma elekitironi, ndipo zokondweretsazi zitha kugwiritsidwa ntchito kupanga magetsi. Funso ndi momwe mungasamutsire zokondweretsa izi ku silicon ndi kupitirira?

Wowonda wosanjikiza wa hafnium oxynitride unakhala ngati mlatho pakati pa filimu ya tetracene pamwamba ndi silicon. Njira zamtundu uwu ndi zotsatira za pamwamba pa silicon zimatembenuza ma excitons kukhala ma electron, ndiyeno zonse zimapitirira monga mwachizolowezi. Kuyesera kunatha kusonyeza kuti izi zimawonjezera mphamvu ya selo ya dzuwa mu mawonekedwe a buluu ndi obiriwira. Malinga ndi asayansi, awa si malire owonjezera mphamvu ya silicon solar cell. Koma ngakhale luso lazopangapanga loperekedwa litenga zaka zambiri kuti lizigulitsidwa.

Source: 3dnews.ru