Dub siliconphotodetectorCov ntaub ntawv: sab nraud quantum efficiency txog li 132%
Raws li kev tshaj tawm xov xwm, cov kws tshawb fawb ntawm Aalto University tau tsim cov khoom siv optoelectronic nrog kev ua haujlwm sab nraud ntawm quantum txog li 132%.Qhov kev ua yeeb yam tsis zoo no tau ua tiav los ntawm kev siv nanostructured dub silicon, uas tuaj yeem yog qhov tseem ceeb rau lub hnub ci hlwb thiab lwm yam.photodetectors.Yog hais tias ib tug hypothetical photovoltaic ntaus ntawv muaj ib tug sab nraud quantum efficiency ntawm 100 feem pua, nws txhais tau hais tias txhua photon uas hits nws tsim ib tug electron, uas yog sau raws li hluav taws xob los ntawm ib tug Circuit Court.
Thiab cov cuab yeej tshiab no tsis tsuas yog ua tiav 100 feem pua ntawm kev ua haujlwm, tab sis ntau dua 100 feem pua.132% txhais tau tias qhov nruab nrab ntawm 1.32 electrons ib photon.Nws siv cov silicon dub ua cov khoom siv thiab muaj lub khob hliav qab thiab columnar nanostructure uas tuaj yeem nqus tau ultraviolet lub teeb.
Pom tseeb koj tsis tuaj yeem tsim 0.32 cov hluav taws xob ntxiv tawm ntawm huab cua nyias, tom qab tag nrho, physics hais tias lub zog tsis tuaj yeem tsim tawm ntawm huab cua nyias, yog li cov hluav taws xob ntxiv no tuaj qhov twg?
Nws tag nrho los mus rau lub hauv paus ntsiab lus ua hauj lwm ntawm photovoltaic cov ntaub ntawv.Thaum lub photon ntawm qhov teeb meem lub teeb hits ib tug active tshuaj, feem ntau silicon, nws knocks ib tug electron tawm ntawm ib tug ntawm cov atoms.Tab sis qee zaus, lub zog photon tuaj yeem tshem tawm ob lub tshuab hluav taws xob yam tsis tau ua txhaum txoj cai ntawm lub cev.
Tsis muaj qhov tsis ntseeg tias kev siv qhov tshwm sim no tuaj yeem pab tau zoo hauv kev txhim kho cov qauv ntawm lub hnub ci.Hauv ntau cov khoom siv optoelectronic, kev ua tau zoo yog poob rau ntau txoj hauv kev, suav nrog thaum photons tau cuam tshuam los ntawm lub cuab yeej lossis cov khoom siv hluav taws xob rov ua dua nrog "qhov" sab laug hauv atoms ua ntej muab los ntawm Circuit Court.
Tab sis Aalto pab neeg hais tias lawv tau tshem tawm cov teeb meem no ntau heev.Black silicon absorbs photons ntau dua li lwm cov ntaub ntawv, thiab cov tapered thiab columnar nanostructures txo electron recombination ntawm cov khoom nto.
Zuag qhia tag nrho, cov kev nce qib no tau ua rau sab nraud quantum efficiency ntawm lub cuab yeej mus txog 130%.Pab pawg cov txiaj ntsig tau txawm tias nws tus kheej tau txheeb xyuas los ntawm lub teb chaws Yelemees lub koom haum Metrology, PTB (German Federal Institute of Physics).
Raws li cov kws tshawb fawb, qhov kev ua haujlwm ntawm cov ntaub ntawv no tuaj yeem txhim kho qhov kev ua tau zoo ntawm qhov pib txhua lub photodetector, suav nrog lub hnub ci hlwb thiab lwm lub teeb pom kev zoo, thiab lub tshuab ntes tshiab twb tau siv los ua lag luam.
Post lub sij hawm: Lub Xya hli ntuj-31-2023