Isithwebuli sezithombe esisha esizwela kakhulu

Isithwebuli sezithombe esisha esizwela kakhulu

Muva nje, ithimba labacwaningi e-Chinese Academy of Sciences (CAS) elisekelwe ku-polycrystalline gallium-rich-rich Gallium oxide Materials (PGR-GaOX) lihlongoze ngokokuqala ngqa isu elisha lokuklama lokuzwela okuphezulu kanye nesivinini sokuphendula esiphezulu se-photodetector ngokusebenzisa i-interface pyroelectric ehlanganisiwe. kanye nemiphumela ye-photoconductivity, kanye nocwaningo olufanele lushicilelwe kokuthi Izinto Ezithuthukile. Izitholi zikagesi wesithombe ezinamandla aphezulu (ze-ultraviolet ejulile (DUV) kuya kumabhendi e-X-ray) zibalulekile emikhakheni eyahlukene, okuhlanganisa ukuphepha kwezwe, 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 ukuzuza okuphezulu ngenxa yezinkambu ze-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 iyimpahla ethembisayo yesithwebuli sesithombe samandla aphezulu, kodwa futhi inikeza isu elisha lokubona ukusebenza okuphezulu kwezithonjana zamandla aphezulu.