Okushaisitholi sesithombe esizwela kakhulu
Muva nje, ithimba locwaningo e-Chinese Academy of Sciences (CAS) elisekelwe ku-Gallium oxide Materials (PGR-GaOX) ecebile nge-polycrystalline gallium liphakamise okokuqala isu elisha lokuklama lokuzwela okuphezulu kanye nesivinini esikhulu sokuphendula okuphezulu.umshini wokuthola izithombengokusebenzisa imiphumela ehlanganisiwe ye-pyroelectric kanye ne-photoconductivity, kanti ucwaningo olufanele lwanyatheliswa ku-Advanced Materials.izitholi ze-photoelectric(kuma-ultraviolet ajulile (DUV) kuya kuma-X-ray bands) abaluleke kakhulu emikhakheni eyahlukahlukene, okuhlanganisa ukuphepha kwezwe, ezokwelapha, kanye nesayensi yezimboni.
Kodwa-ke, izinto ze-semiconductor zamanje ezifana ne-Si ne-α-Se zinezinkinga zokukhishwa okukhulu kwamanje kanye ne-X-ray ephansi, okunzima ukuhlangabezana nezidingo zokutholwa kokusebenza okuphezulu. Ngokuphambene nalokho, izinto ze-semiconductor gallium oxide ze-wide-band gap (WBG) zibonisa amandla amakhulu okutholwa kwe-photoelectric enamandla aphezulu. Kodwa-ke, ngenxa yesithiyo esijulile esingenakugwenywa ohlangothini lwezinto kanye nokuntuleka komklamo ophumelelayo esakhiweni sedivayisi, kuyinselele ukuqaphela ukuzwela okuphezulu kanye nesivinini esiphezulu sokusabela okuphezulu okusekelwe kuma-semiconductors we-wide-band gap. Ukuze kuxazululwe lezi zinselele, ithimba locwaningo eShayina liklame i-pyroelectric photoconductive diode (PPD) esekelwe ku-PGR-GaOX okokuqala. Ngokuhlanganisa umphumela we-interface pyroelectric nomphumela we-photoconductivity, ukusebenza kokutholwa kuthuthuke kakhulu. I-PPD ibonise ukuzwela okuphezulu kokubili kuma-DUV nama-X-ray, ngamazinga okuphendula afinyelela ku-104A/W kanye no-105μC×Gyair-1/cm2, ngokulandelana, okungaphezu kwezikhathi eziyi-100 eziphakeme kunezitholi zangaphambilini ezenziwe ngezinto ezifanayo. Ngaphezu kwalokho, umphumela we-pyroelectric obangelwa ukulingana kwe-polar kwesifunda sokuncipha kwe-PGR-GaOX ungandisa isivinini sokuphendula sesitholi ngezikhathi eziyi-105 kuya ku-0.1ms. Uma kuqhathaniswa nama-photodiode avamile, imodi ezisebenzisa yona ngokwayo i-PPDS ikhiqiza izinzuzo eziphakeme ngenxa yamasimu e-pyroelectric ngesikhathi sokushintsha kokukhanya.
Ngaphezu kwalokho, i-PPD ingasebenza kwimodi ye-bias, lapho inzuzo incike kakhulu ku-bias voltage, futhi inzuzo ephezulu kakhulu ingatholakala ngokwandisa i-bias voltage. I-PPD inamandla amakhulu okusebenzisa ezinhlelweni zokuthuthukisa izithombe ezisebenzisa amandla aphansi kanye nokuzwela okuphezulu. Lo msebenzi awugcini nje ngokufakazela ukuthi i-GaOX iyi-ethembisayoisitholi sezithombe esinamandla aphezuluizinto ezibonakalayo, kodwa futhi inikeza isu elisha lokuthola ama-photodetector anamandla aphezulu asebenza kahle.
Isikhathi sokuthunyelwe: Septhemba-10-2024