Chowunikira zithunzi cha infrared chodziyendetsa chokha chogwira ntchito bwino kwambiri

Yodziyendetsa yokha bwino kwambirichowunikira zithunzi cha infrared

infraredchowunikira zithunziIli ndi makhalidwe monga mphamvu yolimbana ndi kusokoneza, mphamvu yozindikira zolinga, kugwira ntchito nthawi zonse komanso kubisala bwino. Ikuchita gawo lofunika kwambiri m'magawo monga zamankhwala, zankhondo, ukadaulo wamlengalenga ndi uinjiniya wa chilengedwe. Pakati pawo, imadziyendetsa yokhakuzindikira kwa photoelectricChip yomwe ingathe kugwira ntchito yokha popanda magetsi ena akunja yakopa chidwi chachikulu pa ntchito yozindikira ma infrared chifukwa cha magwiridwe ake apadera (monga kudziyimira pawokha pa mphamvu, kukhudzidwa kwambiri komanso kukhazikika, ndi zina zotero). Mosiyana ndi zimenezi, ma chips achikhalidwe ozindikira ma photoelectric, monga ma chips a infrared okhala ndi silicon kapena narrowbandgap semiconductor, samangofuna ma voltages owonjezera kuti ayendetse kulekanitsa ma carriers opangidwa ndi photo kuti apange ma photocurrents, komanso amafunikira makina ena oziziritsira kuti achepetse phokoso la kutentha ndikuwonjezera kuyankha. Chifukwa chake, zakhala zovuta kukwaniritsa malingaliro atsopano ndi zofunikira za m'badwo wotsatira wa ma chips ozindikira ma infrared mtsogolo, monga kugwiritsa ntchito mphamvu zochepa, kukula kochepa, mtengo wotsika komanso magwiridwe antchito apamwamba.

Posachedwapa, magulu ofufuza ochokera ku China ndi Sweden apereka lingaliro la chipangizo chatsopano chodziwira ma photoelectric cha pin heterojunction chodziyendetsa chokha chodziyendetsa chokha chotchedwa short-wave infrared (SWIR) chozikidwa pa mafilimu a graphene nanoribbon (GNR)/alumina/single crystal silicon. Pogwiritsa ntchito mphamvu yogwirizana ya kuwala koyambitsa chifukwa cha mawonekedwe osiyanasiyana ndi malo ogwiritsira ntchito magetsi, chipangizochi chinawonetsa kuyankha kwakukulu komanso magwiridwe antchito ozindikira pa zero bias voltage. Chip chodziwira ma photoelectric chili ndi A response rate yokwana 75.3 A/W mu self-driven mode, kuchuluka kwa kuzindikira kwa 7.5 × 10¹⁴ Jones, komanso mphamvu yakunja ya quantum yokwana pafupifupi 104%, zomwe zimapangitsa kuti ma chip amtundu womwewo a silicon-based chips azigwira ntchito bwino kwambiri ndi ma order 7 akuluakulu. Kuphatikiza apo, pansi pa njira yoyendetsera yachikhalidwe, kuchuluka kwa mayankho a chip, kuchuluka kwa kuzindikira, ndi mphamvu yakunja ya quantum zonse ndi zapamwamba kwambiri mpaka 843 A/W, 10¹⁵ Jones, ndi 105% motsatana, zonse zomwe ndi zapamwamba kwambiri zomwe zanenedwa mu kafukufuku wapano. Pakadali pano, kafukufukuyu adawonetsanso momwe chipangizo chowunikira cha photoelectric chimagwiritsidwa ntchito m'njira yeniyeni m'magawo a kulumikizana kwa kuwala ndi kujambula kwa infrared, zomwe zikuwonetsa kuthekera kwake kwakukulu kogwiritsa ntchito.

Pofuna kuphunzira mwadongosolo momwe photoelectric imagwirira ntchito ya photodetector pogwiritsa ntchito graphene nanoribbons /Al₂O₃/ single crystal silicon, ofufuza anayesa static (current-voltage current) ndi dynamic characteristic responses (current-time current). Kuti ayese mwadongosolo mawonekedwe a optical response a graphene nanoribbon /Al₂O₃/ monocrystalline silicon heterostructure photodetector pansi pa ma voltages osiyanasiyana a bias, ofufuza anayeza dynamic current response ya chipangizocho pa 0 V, -1 V, -3 V ndi -5 V biases, ndi optical power density ya 8.15 μW/cm². Photocurrent imawonjezeka ndi reverse bias ndipo imasonyeza liwiro la response fast pa bias voltages zonse.

Pomaliza, ofufuzawo adapanga njira yojambulira zithunzi ndipo adakwanitsa kujambula zithunzi za infrared ya mafunde afupi. Dongosololi limagwira ntchito mopanda tsankho ndipo siligwiritsa ntchito mphamvu konse. Mphamvu yojambulira zithunzi ya chojambulira zithunzi idayesedwa pogwiritsa ntchito chigoba chakuda chokhala ndi chilembo "T" (monga momwe zasonyezedwera pa Chithunzi 1).

Pomaliza, kafukufukuyu adapanga bwino zida zodziwira zokha pogwiritsa ntchito ma graphene nanoribbons ndipo adapeza kuyankha kwakukulu kwambiri. Pakadali pano, ofufuzawa adawonetsa bwino luso la kulumikizana ndi kujambula la izichowunikira zithunzi chomwe chimayankha bwino kwambiriKupambana kwa kafukufukuyu sikuti kumangopereka njira yothandiza yopangira ma nanoribhoni a graphene ndi zida zamagetsi zozikidwa pa silicon, komanso kukuwonetsa magwiridwe antchito awo abwino kwambiri ngati zida zodziwira ma infrared za mafunde afupiafupi zomwe zimadzipangira zokha.