Black siliconphotodetectorrekodhi: kushanda kwekunze kwehuwandu kusvika ku132%
Zvinoenderana nemishumo yenhau, vaongorori veAalto University vakagadzira optoelectronic mudziyo une yekunze quantum kunyatsoshanda inosvika 132%.Ichi chisingafungirwe chiitiko chakaitwa nekushandisa nanostructured nhema silicon, iyo inogona kunge iri budiriro huru yemasero ezuva uye mamwe.photodetectors.Kana imwe yekufungidzira photovoltaic device ine yekunze quantum kunyatsoshanda kwe100 muzana, zvinoreva kuti photon imwe neimwe inoirova inobudisa electron, iyo inounganidzwa semagetsi kuburikidza nedunhu.
Uye ichi chishandiso chitsva hachingoite 100 muzana kunyatsoita, asi kupfuura zana muzana.132% zvinoreva avhareji ye1.32 maerekitironi paphoton.Inoshandisa silicon nhema sechinhu chinoshanda uye ine koni uye columnar nanostructure inogona kutora ultraviolet chiedza.
Zviripachena kuti haugone kugadzira mamwe maerekitironi 0,32 kubva mumhepo yakatetepa, mushure mezvose, fizikisi inoti simba harigone kugadzirwa kubva mumhepo yakatetepa, saka mamwe maerekitironi aya anobva kupi?
Izvo zvose zvinosvika kune general working principle of photovoltaic materials.Kana fotoni yechiedza chechiitiko ichirova chinhu chinoshanda, kazhinji silicon, inogogodza erekitironi kubva mune imwe yemaatomu.Asi mune dzimwe nguva, high-energy photon inogona kugogodza kunze maerekitironi maviri pasina kuputsa chero mitemo yefizikiki.
Hapana mubvunzo kuti kushandisa chiitiko ichi kunogona kubatsira zvikuru mukuvandudza kugadzirwa kwemasero ezuva.Muzvinhu zvakawanda zveoptoelectronic, kushanda zvakanaka kunorasika munzira dzakawanda, kusanganisira kana mafotoni anoratidzwa kubva pachigadzirwa kana maerekitironi anosanganiswa ne "maburi" akasiiwa mumaatomu asati aunganidzwa nedunhu.
Asi chikwata cheAalto chinoti chabvisa zvimhingamipinyi izvi zvakanyanya.Siricon nhema inotora mamwe mafotoni kupfuura zvimwe zvinhu, uye iyo tapered uye columnar nanostructures inoderedza kudzokororwa kwerekitironi pamusoro pechinhu.
Pakazere, kufambira mberi uku kwakagonesa yekunze quantum kunyatsoshanda kwemudziyo kusvika 130%.Mibairo yechikwata ichi yakatosimbiswa yakazvimirira neGerman National Metrology Institute, iyo PTB (German Federal Institute of Physics).
Sekureva kwevatsvagiri, iyi rekodhi inoshanda inogona kuvandudza mashandiro echero ipi neipi yefotodetector, kusanganisira maseru ezuva uye mamwe ma sensors emwenje, uye detector nyowani iri kutoshandiswa kutengeserana.
Nguva yekutumira: Jul-31-2023