Entshaisixhobo sokubona ifoto esinovakalelo oluphezulu
Kutshanje, iqela lophando kwi-Chinese Academy of Sciences (CAS) elisekelwe kwi-polycrystalline gallium-rich Gallium oxide Materials (PGR-GaOX) licebise okokuqala icebo elitsha loyilo lobuchule obuphezulu kunye nesantya esiphezulu sokusabela.isixhobo sokubona iifotongokusebenzisa iziphumo ezidibeneyo ze-pyroelectric kunye ne-photoconductivity, kwaye uphando olufanelekileyo lupapashwe kwi-Advanced Materials.izixhobo zokubona umbane(kwi-deep ultraviolet (DUV) ukuya kwi-X-ray bands) zibaluleke kakhulu kwiinkalo ezahlukeneyo, kuquka ukhuseleko lwesizwe, amayeza, kunye nesayensi yemizi-mveliso.
Nangona kunjalo, izixhobo ze-semiconductor zangoku ezifana ne-Si kunye ne-α-Se zineengxaki ze-leaking current enkulu kunye ne-X-ray absorption coefficient ephantsi, okunzima ukuhlangabezana neemfuno zokufumanisa ukusebenza okuphezulu. Ngokwahlukileyo koko, izixhobo ze-semiconductor gallium oxide ze-wide-band gap (WBG) zibonisa amandla amakhulu okufumanisa i-photoelectric yamandla aphezulu. Nangona kunjalo, ngenxa ye-deep level trap engenakuphepheka kwicala lezinto kunye nokungabikho koyilo olusebenzayo kwisakhiwo sesixhobo, kunzima ukufumana uvakalelo oluphezulu kunye ne-high response high energy photon detectors ezisekelwe kwi-wide-band gap semiconductors. Ukujongana nale mingeni, iqela lophando eTshayina liyile i-pyroelectric photoconductive diode (PPD) esekwe kwi-PGR-GaOX okokuqala. Ngokudibanisa i-interface pyroelectric effect kunye ne-photoconductivity effect, ukusebenza kokufumanisa kuphuculwe kakhulu. I-PPD ibonise uvakalelo oluphezulu kwi-DUV kunye ne-X-rays, kunye namazinga okuphendula afikelela kwi-104A/W kunye ne-105μC×Gyair-1/cm2, ngokulandelanayo, ngaphezulu kwamaxesha ali-100 aphezulu kune-detectors zangaphambili ezenziwe ngezinto ezifanayo. Ukongeza, isiphumo se-interface pyroelectric esibangelwa yi-polar symmetry ye-PGR-GaOX depletion region sinokunyusa isantya sempendulo ye-detector ngamaxesha ali-105 ukuya kwi-0.1ms. Xa kuthelekiswa nee-photodiode zesiqhelo, i-PPDS yemowudi ezisebenzisa amandla ngokwayo ivelisa iinzuzo eziphezulu ngenxa yamasimi e-pyroelectric ngexesha lokutshintsha kokukhanya.
Ukongeza, i-PPD inokusebenza kwimo ye-bias, apho i-gain ixhomekeke kakhulu kwi-bias voltage, kwaye i-gain ephezulu kakhulu inokufezekiswa ngokunyusa i-bias voltage. I-PPD inamandla amakhulu okusetyenziswa kwiinkqubo zokuphucula imifanekiso ezisebenzisa amandla aphantsi kunye novakalelo oluphezulu. Lo msebenzi awubonisi nje kuphela ukuba i-GaOX ithembisayoisixhobo sokubona ifoto esinamandla aphezuluizinto ezisetyenzisiweyo, kodwa ikwabonelela ngecebo elitsha lokufezekisa izixhobo zokubona iifoto ezinamandla aphezulu ezisebenza kakuhle.
Ixesha leposi: Septemba-10-2024