Okushahigh sensitivity photodetector
Muva nje, ithimba labacwaningi e-Chinese Academy of Sciences (CAS) elisekelwe ku-polycrystalline gallium-rich Gallium oxide Materials (PGR-GaOX) liphakamise ngokokuqala ngqa isu elisha lokuklama lokuzwela okuphezulu kanye nesivinini sokuphendula esiphezulu.i-photodetectorngokusebenzisa i-interface ehlanganisiwe ye-pyroelectric nemiphumela ye-photoconductivity, futhi ucwaningo olufanele lushicilelwe kokuthi Izinto Ezithuthukile. Amandla aphezuluama-photoelectric detectors(kumabhendi e-ultraviolet ejulile (DUV) kuya kuma-X-ray) abalulekile emikhakheni eyahlukene, okuhlanganisa ukuphepha kuzwelonke, imithi, nesayensi yezimboni.
Kodwa-ke, izinto zamanje ze-semiconductor ezifana ne-Si ne-α-Se zinezinkinga zokuvuza okukhulu kwamanje kanye ne-X-ray ephansi yokumunca i-coefficient, okunzima ukuhlangabezana nezidingo zokutholwa kokusebenza okuphezulu. Ngokuphambene, i-wide-band gap (WBG) semiconductor gallium oxide materials ibonisa amandla amakhulu okuthola ugesi wesithombe wamandla aphezulu. Kodwa-ke, ngenxa yezinga elijulile lomgibe ongenakugwemeka ohlangothini lwezinto ezibonakalayo kanye nokuntuleka kwedizayini ephumelelayo esakhiweni sedivayisi, kuyinselele ukubona ukuzwela okuphezulu kanye nesivinini sokuphendula okuphezulu kwezitholi zamandla ezithombeni ezisekelwe kuma-semiconductors e-gap ebanzi. Ukuze kubhekwane nalezi zinselele, ithimba labacwaningi e-China liklame i-pyroelectric photoconductive diode (PPD) esekelwe ku-PGR-GaOX okokuqala ngqa. Ngokuhlanganisa umphumela we-pyroelectric esibonakalayo nomphumela we-photoconductivity, ukusebenza kokutholwa kuthuthukiswa kakhulu. I-PPD ibonise ukuzwela okuphezulu kukho kokubili i-DUV ne-X-ray, ngezinga lokuphendula elifika ku-104A/W kanye no-105μC×Gyair-1/cm2, ngokulandelana, ngaphezu kwezikhathi eziyi-100 eziphakeme kunezitholi zangaphambilini ezenziwe ngezinto ezifanayo. Ukwengeza, umphumela we-pyroelectric esibonakalayo obangelwa i-polar symmetry yesifunda sokuqedwa kwe-PGR-GaOX singakhuphula isivinini sokuphendula somtshina izikhathi ezingu-105 ukuya ku-0.1ms. Uma kuqhathaniswa nama-photodiode avamile, imodi ye-self-powered PPDS ikhiqiza izinzuzo eziphezulu ngenxa yamasimu we-pyroelectric ngesikhathi sokushintsha ukukhanya.
Ngaphezu kwalokho, i-PPD ingasebenza ngemodi yokuchema, lapho inzuzo incike kakhulu ku-voltage yokuchema, futhi ukuzuza okuphezulu kakhulu kungafinyelelwa ngokwandisa i-voltage yokuchema. I-PPD inamandla amakhulu wokusebenzisa amandla aphansi kanye nezinhlelo zokuthuthukisa ukuzwela okukhulu kwesithombe. Lo msebenzi awugcini nje ngokufakazela ukuthi i-GaOX iyathembisahigh energy photodetectorimpahla, kodwa futhi inikeza isu elisha lokubona ukusebenza okuphezulu kwama-photodetectors wamandla aphezulu.
Isikhathi sokuthumela: Sep-10-2024