Kuchita bwino kwa quantum kwa photodetector kumaphwanya malire

Malinga ndi maukonde gulu la sayansi ya sayansi posachedwapa linanena kuti ofufuza Finnish apanga wakuda pakachitsulo photodetector ndi kunja quantum dzuwa la 130%, yomwe ndi nthawi yoyamba kuti dzuwa zipangizo photovoltaic kuposa malire ongoyerekeza 100%, amene akuyembekezeka kwambiri. kupititsa patsogolo luso la zida zowunikira zithunzi zamagetsi, ndipo zidazi zimagwiritsidwa ntchito kwambiri pamagalimoto, mafoni am'manja, mawotchi anzeru ndi zida zamankhwala.

Photodetector ndi sensa yomwe imatha kuyeza kuwala kapena mphamvu zina zamagetsi, kusintha ma photon kukhala magetsi, ndipo ma photons omwe amalowetsedwa amapanga awiriawiri a electron-hole. Photodetector imaphatikizapo photodiode ndi phototransistor, ndi zina zotero. Kugwira ntchito kwa Quantum kumagwiritsidwa ntchito kufotokozera kuchuluka kwa ma photon omwe amalandiridwa ndi chipangizo monga photodetector mu peyala ya electron-hole, ndiko kuti, kuchuluka kwa quantum kumakhala kofanana ndi chiwerengero cha ma electron opangidwa ndi photogenerated chiwerengero cha mafotoni a zochitika.

Pamene chochitika cha photon chimapanga electron kupita ku dera lakunja, mphamvu ya kunja kwa chipangizocho ndi 100% (yomwe poyamba inkaganiziridwa kuti ndiyo malire). Pakafukufuku waposachedwa, chida chakuda cha silicon photodetector chinali ndi mphamvu mpaka 130 peresenti, zomwe zikutanthauza kuti chochitika chimodzi cha photon chimapanga pafupifupi ma electron 1.3.

Malinga ndi ofufuza a ku yunivesite ya Aalto, chida chobisika chomwe chimapangitsa kuti izi zitheke ndi njira yochulukitsira chonyamulira yomwe imachitika mkati mwa mawonekedwe apadera a silicon photodetector yakuda, yomwe imayambitsidwa ndi ma photon amphamvu kwambiri. M'mbuyomu, asayansi sanathe kuyang'ana chodabwitsa mu zipangizo zenizeni chifukwa kukhalapo kwa magetsi ndi kuwala kutayika kunachepetsa chiwerengero cha ma electron osonkhanitsidwa. "Zipangizo zathu za nanostructured zilibe recombination ndipo palibe kutayika, kotero tikhoza kusonkhanitsa zonyamulira zochulukira," adatero mtsogoleri wa kafukufuku Pulofesa Hera Severn.

Izi zatsimikiziridwa ndi Institute of Physical Technology ya German National Metrology Society (PTB), ntchito yoyezera yolondola komanso yodalirika ku Ulaya.

Ofufuzawo akuwona kuti kujambula bwino kumeneku kumatanthauza kuti asayansi amatha kusintha kwambiri magwiridwe antchito a zida zowunikira ma photoelectric.

"Zowunikira zathu zapanga chidwi chochuluka, makamaka m'madera a biotechnology ndi kuyang'anira ndondomeko ya mafakitale," adatero Dr. Mikko Juntuna, CEO wa ElfysInc, kampani ya Aalto University. Akuti ayamba kupanga zida zotere kuti azigwiritse ntchito pamalonda.