Elu-arụmọrụ onwe-chụpụrụfotodetector infrared
infraredfotodetectornwere njiri mara ike mgbochi nnyonye anya siri ike, ikike nnabata ebumnuche siri ike, ọrụ ihu igwe niile yana ezigbo nzuzo. Ọ na-arụ ọrụ dị mkpa na-arịwanye elu na mpaghara dịka ọgwụ, agha, teknụzụ mbara igwe na injinịa gburugburu ebe obibi. N'ime ha, ndị na-anya onwe hanchọpụta fotoelectricmgbawa nke nwere ike ịrụ ọrụ n'onwe ya na-enweghị mgbakwunye ike ọzọ nke mpụga adọtala mmasị dị ukwuu n'ọhịa nke nchọpụta infrared n'ihi arụmọrụ ya pụrụ iche (dịka nnwere onwe ike, nnukwu uche na nkwụsi ike, wdg). N'ụzọ dị iche, ibe nchọpụta fotoelectric ọdịnala, dị ka ibe silikoni ma ọ bụ narrowbandgap semiconductor dabeere na infrared ibe, ọ bụghị nanị na-achọ ka voltaji ndị ọzọ na-akpaghasị anya iji mee ka nkewa nke ndị na-ebu foto na-emepụta fotocurrents, ma ọ dịkwa mkpa usoro ndị ọzọ jụrụ oyi iji belata ụda ọkụ ma melite nzaghachi. Ya mere, ọ ghọwo ihe siri ike izute echiche ọhụrụ na ihe ndị a chọrọ nke ọgbọ na-abịa n'ọgbọ nke infrared nchọpụta ibe n'ọdịnihu, dị ka obere ike oriri, obere nha, ọnụ ala na arụmọrụ dị elu.
N'oge na-adịbeghị anya, ndị otu nyocha sitere na China na Sweden atụpụtala akwụkwọ akụkọ pin heterojunction infrared (SWIR) fotoelectric nchọpụta mgbawa nke dabere na ihe nkiri graphene nanoribbon (GNR) / alumina / silicon crystal silicon. N'okpuru mmetụta ngwakọta nke mmetụta gating anya na-ebute site na interface dị iche iche na ebe eletrik arụnyere, mgbawa ahụ gosipụtara nzaghachi dị elu na nchọpụta nchọpụta na voltaji efu efu. Ihe mgbawa nchọpụta fotoelectric nwere ọnụego nzaghachi dị elu dị ka 75.3 A/W na ọnọdụ nke onwe ya, ọnụọgụ nchọpụta nke 7.5 × 10¹⁴ Jones, yana arụmọrụ nke mpụga nke dị nso 104%, na-eme ka nchọpụta nchọpụta nke otu ụdị nke silikoni dabeere na ndekọ site na ndekọ 7 iwu nke ịdị ukwuu. Na mgbakwunye, n'okpuru ụdị draịva a na-ahụkarị, ọnụego nzaghachi mgbawa, ọnụego nchọpụta, na arụmọrụ nke mpụta dị elu ka 843 A/W, 10¹⁵ Jones, na 105% n'otu n'otu, ha niile bụ ụkpụrụ kachasị elu a kọrọ na nyocha ugbu a. Ka ọ dị ugbu a, nchọpụta a gosikwara ngwa n'ezie nke mgbawa nchọpụta fotoelectric n'ọhịa nke nkwurịta okwu anya na imaging infrared, na-egosipụta nnukwu ike ngwa ya.
Iji nyochaa n'usoro nyocha ọrụ fotoelectric nke onye na-ahụ maka foto dabere na graphene nanoribbons / Al₂O₃ / silicon kristal, ndị nchọpụta nwalere static ya (mgbanwe voltaji dị ugbu a) na nzaghachi njirimara siri ike (usoro oge ugbu a). Iji nyochaa n'usoro n'usoro njirimara nzaghachi ngwa anya nke graphene nanoribbon / Al₂O₃/ monocrystalline silicon heterostructure photodetector n'okpuru voltaji dị iche iche, ndị nchọpụta tụrụ nzaghachi ike ugbu a nke ngwaọrụ ahụ na 0 V, -1 V, -3 V na -5 V ihunanya, yana njupụta ike anya nke μW² 8.5cm. Foto nke ugbu a na-abawanye site na nhụsianya azụ ma na-egosi ọsọ nzaghachi ngwa ngwa na voltaji ọ bụla.
N'ikpeazụ, ndị na-eme nchọpụta chepụtara usoro onyonyo wee nweta ihe ịga nke ọma nke na-enye onwe ya nke infrared dị mkpụmkpụ. Sistemu na-arụ ọrụ n'okpuru echiche efu na enweghị ike oriri ma ọlị. A na-enyocha ikike ịse foto nke onye na-ese foto site na iji ihe nkpuchi ojii nwere ụkpụrụ mkpụrụedemede "T" (dị ka egosiri na foto 1).
N'ikpeazụ, nchọpụta a rụpụtara nke ọma ihe ndị na-ahụ maka foto na-arụ ọrụ nkeonwe dabere na graphene nanoribbons wee nweta ọnụ ọgụgụ nzaghachi dị elu na-emebi ndekọ. Ka ọ dị ugbu a, ndị nchọpụta ahụ gosipụtara nke ọma nkwurịta okwu anya na ike ịse foto nke afotodetector na-anabata nke ọma. Mmezu nyocha a abụghị naanị na-enye ụzọ bara uru maka mmepe nke graphene nanoribbons na ngwaọrụ optoelectronic dabere na silicon, mana na-egosipụtakwa ọmarịcha arụmọrụ ha dị ka ndị na-ahụ maka infrared infrared na-agbapụta onwe ha.
Oge nzipu: Eprel-28-2025