Photodetector yumukara wa silicon yumukara: ubushobozi bwa kwant bwo hanze bugera kuri 132%

Silicongufotorainyandiko: imikorere ya kwant yo hanze igera kuri 132%

Nk’uko ibitangazamakuru byabitangaza, abashakashatsi bo muri kaminuza ya Aalto bakoze igikoresho cya optoelectronic gifite ubushobozi bwo kugera kuri 132%. Iyi mikorere idashoboka yagezweho hakoreshejwe silicon yumukara wa nanostructures, ishobora kuba intambwe ikomeye kumirasire yizuba nizindigufotora. Niba hypothetical Photovoltaic igikoresho gifite kwumwanya wo hanze wa 100%, bivuze ko buri fotone iyikubise itanga electron, ikusanyirizwa hamwe nkamashanyarazi binyuze mumuzunguruko.

Kandi iki gikoresho gishya ntabwo kigera gusa ku ijana ku ijana, ariko kirenga 100 ku ijana. 132% bivuze impuzandengo ya electron 1.32 kuri foton. Ikoresha silikoni yumukara nkibikoresho bikora kandi ifite cone ninkingi ya nanostructure ishobora gukurura urumuri ultraviolet.

Biragaragara ko udashobora gukora electroni 0.32 ziva mumyuka yoroheje, erega, physics ivuga ko ingufu zidashobora kuremwa ziva mumyuka yoroheje, none izo electron ziyongera zituruka he?

Byose biza kumahame rusange yakazi yibikoresho bifotora. Iyo foton yumucyo yibintu ikubise ikintu gikora, mubisanzwe silikoni, ikuramo electron muri imwe muri atome. Ariko rimwe na rimwe, fotone ifite ingufu nyinshi irashobora gukuramo electron ebyiri zitarenze ku mategeko ya fiziki.

Ntagushidikanya ko gukoresha iki kintu bishobora gufasha cyane mugutezimbere imiterere yizuba. Mubikoresho byinshi bya optoelectronic, imikorere iratakara muburyo butandukanye, harimo iyo fotone igaragaye kubikoresho cyangwa electron zisubirana hamwe n "" ibyobo "bisigaye muri atome mbere yo gukusanywa numuzunguruko.

Ariko ikipe ya Aalto ivuga ko ahanini bakuyeho izo nzitizi. Silicon yumukara ikurura fotone nyinshi kuruta ibindi bikoresho, kandi nanostructures ya taped hamwe ninkingi igabanya electron recombination hejuru yibikoresho.

Muri rusange, iri terambere ryatumye ubushobozi bwa kwantani bwo hanze bwibikoresho bigera kuri 130%. Ibisubizo by'iyi kipe ndetse byagenzuwe mu bwigenge n'ikigo cy'igihugu cy'Ubudage cya Metrology, PTB (Ikigo cy'Ubudage gishinzwe Ubugenge).

Abashakashatsi bavuga ko iyi mikorere ishobora kunoza imikorere ya fotodetekeri iyo ari yo yose, harimo imirasire y'izuba hamwe n’ibindi byuma bifata urumuri, kandi icyuma gishya kimaze gukoreshwa mu bucuruzi.