Sabon na'urar gano hoto mai ƙarfin fahimta

Sabomai gano hoto mai ƙarfin fahimta

Kwanan nan, wata ƙungiyar bincike a Kwalejin Kimiyya ta ƙasar Sin (CAS) wadda ta dogara da kayan Gallium oxide mai arzikin polycrystalline (PGR-GaOX) ta gabatar da sabuwar dabarar ƙira don samun babban tasiri da kuma saurin amsawa mai girma a karon farko.na'urar gano hotota hanyar tasirin haɗin pyroelectric da photoconductivity, kuma an buga binciken da ya dace a cikin Advanced Materials.na'urorin gano hotuna masu amfani da wutar lantarki(don zurfin ultraviolet (DUV) zuwa X-ray bands) suna da mahimmanci a fannoni daban-daban, ciki har da tsaron ƙasa, magani, da kimiyyar masana'antu.

Duk da haka, kayan semiconductor na yanzu kamar Si da α-Se suna da matsalolin babban kwararar wutar lantarki da ƙarancin yawan sha na X-ray, wanda ke da wuya a biya buƙatun gano aiki mai girma. Sabanin haka, kayan gallium oxide na semiconductor mai faɗi-band (WBG) suna nuna babban yuwuwar gano wutar lantarki mai ƙarfi. Duk da haka, saboda tarko mai zurfi na matakin da ba makawa a gefen kayan da rashin ingantaccen ƙira akan tsarin na'urar, yana da ƙalubale a cimma babban saurin amsawa da na'urorin gano photon mai ƙarfi mai ƙarfi bisa ga na'urorin gano gaɓoɓin mai faɗi-band. Don magance waɗannan ƙalubalen, wata ƙungiyar bincike a China ta tsara diode mai ɗaukar hoto na pyroelectric (PPD) bisa ga PGR-GaOX a karon farko. Ta hanyar haɗa tasirin pyroelectric mai haɗawa tare da tasirin ɗaukar hoto, aikin ganowa ya inganta sosai. PPD ya nuna babban ƙarfin gani ga DUV da X-ray, tare da ƙimar amsawa har zuwa 104A/W da 105μC×Gyair-1/cm2, bi da bi, fiye da sau 100 fiye da na'urorin ganowa na baya da aka yi da kayan iri ɗaya. Bugu da ƙari, tasirin pyroelectric na haɗin gwiwa wanda similar polar na yankin raguwar PGR-GaOX ke haifarwa na iya ƙara saurin amsawar na'urar ganowa sau 105 zuwa 0.1ms. Idan aka kwatanta da photodiodes na gargajiya, yanayin PPDS mai amfani da kansa yana samar da ƙarin riba saboda filayen pyroelectric yayin sauya haske.

Bugu da ƙari, PPD na iya aiki a yanayin bias, inda ribar ta dogara sosai akan ƙarfin bias, kuma ana iya samun riba mai yawa ta hanyar ƙara ƙarfin bias. PPD yana da babban damar amfani a cikin ƙarancin amfani da makamashi da tsarin haɓaka hoto mai ƙarfi. Wannan aikin ba wai kawai yana tabbatar da cewa GaOX abin alhaki banena'urar gano haske mai ƙarfikayan aiki, amma kuma yana samar da sabuwar dabara don cimma manyan na'urorin gano abubuwa masu amfani da makamashi mai yawa.