Sabon babban ji na hoto

Sabohigh sensitivity photodetector

Kwanan nan, ƙungiyar bincike a Cibiyar Nazarin Kimiyya ta kasar Sin (CAS) bisa ga polycrystalline gallium-rich Gallium oxide Materials (PGR-GaOX) sun ba da shawarar a karon farko sabon dabarun ƙira don haɓakar hankali da saurin amsawa mai girma.mai daukar hotota hanyar haɗin gwiwar haɗin gwiwar pyroelectric da tasirin hoto, kuma an buga binciken da ya dace a cikin Abubuwan Ci gaba. High-makamashiphotoelectric detectors(don zurfin ultraviolet (DUV) zuwa rukunin X-ray) suna da mahimmanci a fannoni daban-daban, gami da tsaron ƙasa, magani, da kimiyyar masana'antu.

Duk da haka, kayan aikin semiconductor na yanzu irin su Si da α-Se suna da matsalolin babban ɗigon ruwa na yanzu da ƙananan shayarwar X-ray, wanda ke da wahala don saduwa da buƙatun gano babban aiki. Sabanin haka, gap-band (WBG) semiconductor gallium oxide kayan suna nuna babban yuwuwar gano wutar lantarki mai ƙarfi. Duk da haka, saboda rashin makawa zurfin matakin tarko a gefen abu da kuma rashin ingantaccen ƙira akan tsarin na'urar, yana da ƙalubalanci don gane babban hankali da kuma saurin amsawa mai saurin amsawa ga masu gano photon mai ƙarfi dangane da na'urar tazara mai fadi-band. Don magance waɗannan ƙalubalen, ƙungiyar bincike a kasar Sin ta ƙera na'urar daukar hoto ta pyroelectric photoconductive diode (PPD) bisa PGR-GaOX a karon farko. Ta hanyar haɗa tasirin pyroelectric mai dubawa tare da tasirin hoto, aikin ganowa yana inganta sosai. PPD ya nuna babban hankali ga duka DUV da X-haskoki, tare da ƙimar amsawa har zuwa 104A / W da 105μC × Gyair-1 / cm2, bi da bi, fiye da sau 100 sama da na'urori masu ganowa na baya da aka yi da makamancinsu. Bugu da ƙari, tasirin pyroelectric na keɓancewa wanda ya haifar da alamar iyakacin duniya na yankin lalatawar PGR-GaOX na iya ƙara saurin amsawar mai ganowa ta sau 105 zuwa 0.1ms. Idan aka kwatanta da na al'ada photodiodes, yanayin ikon kai PPDS yana samar da riba mafi girma saboda filayen pyroelectric yayin sauyawar haske.

Bugu da ƙari, PPD na iya yin aiki a cikin yanayin son zuciya, inda riba ta dogara sosai akan ƙarfin wutar lantarki, kuma za a iya samun riba mai girma ta hanyar ƙara ƙarfin wutar lantarki. PPD yana da babban yuwuwar aikace-aikacen a cikin ƙarancin amfani da makamashi da haɓakar tsarin haɓaka hoto mai hankali. Wannan aikin ba kawai ya tabbatar da cewa GaOX mai alƙawarin ba nehigh makamashi photodetectorabu, amma kuma yana ba da sabon dabara don gane babban aiki high makamashi photodetectors.