Ifotodetector entsha enovakalelo oluphezulu

Ifotodetector entsha enovakalelo oluphezulu

Kutshanje, iqela lophando kwi-Academy yaseTshayina yeSayensi (CAS) esekwe kwi-polycrystalline gallium-rich Gallium oxide Materials (PGR-GaOX) icetywayo okokuqala ngqa isicwangciso esitsha soyilo sobuntununtunu obuphezulu kunye nesantya sokuphendula ngesantya esiphezulu se-photodetector nge-interface edityanisiweyo yepyroelectric. kunye nemiphumo ye-photoconductivity, kunye nophando olufanelekileyo lupapashwe kwi-Advanced Materials. Izixhobo ezibonisa amandla aphezulu e-photoelectric detectors (kwi-ultraviolet enzulu (DUV) ukuya kwii-X-ray bands) zibaluleke kakhulu kwiinkalo ezahlukeneyo, kubandakanywa ukhuseleko lwelizwe, amayeza kunye nesayensi yezoshishino.

Nangona kunjalo, izixhobo zangoku ze-semiconductor ezifana ne-Si kunye ne-α-Se zineengxaki zokuvuza okukhulu ngoku kunye ne-coefficient ephantsi ye-X-ray yokufunxa, okunzima ukuhlangabezana neemfuno zokubona ukusebenza okuphezulu. Ngokwahlukileyo, i-wide-band gap (WBG) semiconductor gallium oxide imathiriyeli ibonisa amandla amakhulu okubona umbane we-photoelectric. Nangona kunjalo, ngenxa yenqanaba lobunzulu obungenakuthintelwa kwicala lezinto kunye nokungabikho koyilo olusebenzayo kwisakhiwo sesixhobo, kulucelomngeni ukuqonda ubuntununtunu obuphezulu kunye nesantya esiphezulu sokuphendula ii-photon detectors zamandla ezisekelwe kwi-wide-band gap semiconductors. Ukujongana nale mingeni, iqela lophando e-China lenze i-pyroelectric photoconductive diode (PPD) esekelwe kwi-PGR-GaOX okokuqala. Ngokudibanisa i-interface ye-pyroelectric effect kunye ne-photoconductivity effect, ukusebenza kokufumanisa kuphuculwe kakhulu. I-PPD ibonise uvakalelo oluphezulu kwi-DUV kunye ne-X-rays, kunye namazinga okuphendula ukuya kwi-104A / W kunye ne-105μC × Gyair-1 / cm2, ngokulandelanayo, ngaphezu kwamaxesha e-100 aphezulu kunee-detectors zangaphambili ezenziwe ngezinto ezifanayo. Ukongezelela, i-interface ye-pyroelectric effect ebangelwa i-polar symmetry ye-PGR-GaOX yokunciphisa ingingqi inokunyusa isantya sokuphendula somtshini ngama-105 amaxesha ukuya kwi-0.1ms. Xa kuthelekiswa neefotodiodes eziqhelekileyo, i-self-powered mode PPDS ivelisa inzuzo ephezulu ngenxa yeendawo zepyroelectric ngexesha lokutshintsha ukukhanya.

Ukongeza, i-PPD inokusebenza kwimodi ye-bias, apho inzuzo ixhomekeke kakhulu kwi-voltage ye-bias, kunye ne-ultra-high gain inokufumaneka ngokunyusa i-voltage ye-bias. I-PPD inamandla osetyenziso olukhulu ekusebenziseni amandla aphantsi kunye neenkqubo zokuphucula uvakalelo oluphezulu. Lo msebenzi awungqini nje kuphela ukuba i-GaOX yinto ethembisayo ye-photodetector yamandla aphezulu, kodwa ikwabonelela ngesicwangciso esitsha sokuqonda ukusebenza okuphezulu kweefoto zamandla aphezulu.