Makina apamwamba kwambiri odziyendetsa okha a infrared photodetector

Kudziyendetsa mwapamwamba kwambiriinfrared photodetector

infurarediPhotodetectorali ndi mawonekedwe amphamvu odana ndi kusokoneza, luso lozindikira chandamale, kugwira ntchito nyengo zonse komanso kubisala bwino. Ikugwira ntchito yofunika kwambiri m'magawo monga zamankhwala, zankhondo, ukadaulo wapamlengalenga ndi zomangamanga. Mwa iwo, odziyendetsa okhakupezeka kwa photoelectricchip chomwe chitha kugwira ntchito paokha popanda magetsi owonjezera akunja chakopa chidwi chachikulu pakuwona kwa infrared chifukwa cha ntchito yake yapadera (monga kudziyimira pawokha kwa mphamvu, kukhudzidwa kwakukulu ndi kukhazikika, ndi zina). Mosiyana ndi izi, tchipisi tating'onoting'ono tomwe timapangira ma photoelectric, monga tchipisi cha silicon-based kapena narrowbandgap semiconductor-based infuraredi tchipisi, sikuti timangofunika ma voltages owonjezera a tsankho kuti ayendetse kulekana kwa zonyamulira zopanga zithunzi kuti apange ma photocurrents, komanso amafunikira machitidwe oziziritsa owonjezera kuti achepetse phokoso lamatenthedwe ndikuwongolera kuyankha. Choncho, zakhala zovuta kukwaniritsa malingaliro atsopano ndi zofunikira za mbadwo wotsatira wa tchipisi tating'onoting'ono ta infrared m'tsogolomu, monga kugwiritsa ntchito mphamvu zochepa, kukula kochepa, mtengo wotsika komanso ntchito zambiri.

Posachedwapa, magulu ofufuza ochokera ku China ndi Sweden apereka lingaliro la chipangizo chatsopano cha pini heterojunction self-driven short-wave infrared (SWIR) photoelectric sensor chip yozikidwa pa graphene nanoribbon (GNR) films/alumina/single crystal silicon. Pansi pa kuphatikizika kwa mawonekedwe a optical gating oyambitsidwa ndi mawonekedwe osasinthika komanso malo amagetsi omangidwira, chipcho chinawonetsa kuyankha kwakukulu kwambiri komanso magwiridwe antchito paziro zokondera voteji. Chip chodziwira chithunzi cha photoelectric chili ndi A kuyankha kufika pa 75.3 A/W mumayendedwe odziyendetsa okha, mlingo wodziwikiratu wa 7.5 × 10¹⁴ Jones, ndi mphamvu yakunja yakunja pafupi ndi 104%, kupititsa patsogolo kuzindikirika kwa mtundu womwewo wa tchipisi zokhala ndi silicon polemba maoda 7 a ukulu. Kuonjezera apo, pansi pa kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwekazi ka kayendetsedwe kabwino kabwinobwinobwinobwinobwinobwinobwinobwinobwinobwinobwinobwinobwinobwinobwinobwinonkewpelepelepelepelekembolama' 2020 ndizokwera kwambiri kuposa 843 A/W, 10¹⁵ Jones, ndi 105% motsatana, zonse zomwe ndizofunika kwambiri zomwe zafotokozedwa mu kafukufuku wamakono. Pakadali pano, kafukufukuyu adawonetsanso kugwiritsa ntchito kwenikweni kwapadziko lonse lapansi kwa chipangizo chowunikira ma photoelectric m'magawo a kulumikizana kwa kuwala ndi kujambula kwa infrared, ndikuwunikira kuthekera kwake kwakukulu kogwiritsa ntchito.

Kuti muphunzire mwadongosolo mawonekedwe a photoelectric a photodetector pogwiritsa ntchito graphene nanoribbons /Al₂O₃/ single crystal silicon, ochita kafukufuku adayesa ma static (current-voltage curve) ndi mayankho amphamvu (curve-time curve). Kuti muwunikire mwadongosolo mawonekedwe oyankha a graphene nanoribbon /Al₂O₃/ monocrystalline silicon heterostructure photodetector pansi pa ma voltages osiyanasiyana, ofufuza anayeza kuyankha kwamphamvu kwa chipangizochi pa 0 V, -1 V, -3 V ndi -5 V biases, ndi mphamvu yakumaso ya μ.15 ² W8cm. Photocurrent imawonjezeka ndi kukondera kobwerera m'mbuyo ndikuwonetsa liwiro loyankha mwachangu pama voltages onse atsankho.

Potsirizira pake, ochita kafukufukuwo adapanga njira yojambula zithunzi ndipo adakwanitsa kudzipangira yekha chithunzithunzi cha short-wave infrared. Dongosololi limagwira ntchito mosakondera zero ndipo siligwiritsa ntchito mphamvu konse. Kuthekera kwa kujambula kwa photodetector kunayesedwa pogwiritsa ntchito chigoba chakuda chokhala ndi zilembo za "T" (monga momwe tawonetsera pa Chithunzi 1).

Pomaliza, kafukufukuyu adapanga zida zodzipangira okha zodzipangira okha kutengera ma graphene nanoribbons ndipo adakwaniritsa kuyankha kwakukulu. Pakadali pano, ochita kafukufuku adawonetsa bwino kulumikizana kwa kuwala ndi luso la kujambula kwa izikwambiri kumva photodetector. Kupambana kofufuzaku sikumangopereka njira yothandiza yopangira zida za graphene nanoribbons ndi zida za silicon-based optoelectronic, komanso zikuwonetsa momwe amagwirira ntchito bwino kwambiri ngati makina odzipangira okha a short-wave infrared photodetectors.