Mea nānā kiʻi kiʻekiʻe kiʻekiʻe hou

Mea nānā kiʻi kiʻekiʻe kiʻekiʻe hou

ʻO ka mea i hala koke aku nei, ua noi ʻia kahi hui noiʻi ma ka Chinese Academy of Science (CAS) e pili ana i ka polycrystalline gallium-rich Gallium oxide Materials (PGR-GaOX) no ka manawa mua i kahi hoʻolālā hoʻolālā hou no ka naʻau kiʻekiʻe a me ka wikiwiki pane kiʻekiʻe kiʻekiʻe photodetector ma o ka pilina pyroelectric. a me nā hopena photoconductivity, a ua paʻi ʻia ka noiʻi kūpono ma Advanced Materials. He mea koʻikoʻi nā mea ʻike kiʻi kiʻi kiʻekiʻe (no ka ultraviolet hohonu (DUV) a i nā kaula X-ray) i nā ʻano ʻano like ʻole, me ka palekana aupuni, ka lāʻau lapaʻau, a me ka ʻepekema ʻoihana.

Eia nō naʻe, ʻo nā mea semiconductor o kēia manawa e like me Si a me α-Se nā pilikia o ka leakage nui o kēia manawa a me ka haʻahaʻa X-ray absorption coefficient, he mea paʻakikī ke hoʻokō i nā pono o ka ʻike kiʻekiʻe. ʻO ka ʻokoʻa, hōʻike nā mea semiconductor gallium oxide semiconductor gap wide-band gap (WBG) i ka mana nui no ka ʻike photoelectric kiʻekiʻe. Eia naʻe, ma muli o ka inevitable hohonu pae pahele ma kaʻaoʻao mea a me ka nele o ka hoʻolālā kūpono ma ka hale hana, he mea paʻakikī ke hoʻomaopopo i ka ʻike kiʻekiʻe a me ka wikiwiki pane kiʻekiʻe kiʻekiʻe ka ikehu photon detectors ma muli o nā semiconductors ākea ākea. No ka hoʻoponopono ʻana i kēia mau pilikia, ua hoʻolālā kahi hui noiʻi ma Kina i kahi pyroelectric photoconductive diode (PPD) i hoʻokumu ʻia ma PGR-GaOX no ka manawa mua. Ma ka hoʻopili ʻana i ka hopena pyroelectric interface me ka hopena photoconductivity, ʻoi aku ka maikaʻi o ka hana ʻike. Ua hōʻike ka PPD i ka naʻau kiʻekiʻe i ka DUV a me nā kukui X, me nā pane pane a hiki i 104A / W a me 105μC × Gyair-1 / cm2, ʻoi aku ma mua o 100 mau manawa kiʻekiʻe ma mua o nā mea ʻike mua i hana ʻia me nā mea like. Eia kekahi, hiki i ka hopena pyroelectric interface i hoʻokumu ʻia e ka polar symmetry o ka PGR-GaOX depletion region hiki ke hoʻonui i ka wikiwiki pane o ka mea ʻike e 105 mau manawa i 0.1ms. Ke hoʻohālikelike ʻia me nā photodiodes maʻamau, ʻo ke ʻano hana ponoʻī PPDS e hoʻopuka i nā loaʻa kiʻekiʻe ma muli o nā māla pyroelectric i ka wā o ka hoʻololi ʻana i ka māmā.

Eia hou, hiki i ka PPD ke hana ma ke ʻano bias, kahi e hilinaʻi nui ai ka loaʻa ʻana i ka volta bias, a hiki ke loaʻa ka loaʻa ultra-kiʻekiʻe ma ka hoʻonui ʻana i ka volta bias. Loaʻa i ka PPD ka mana hoʻohana nui i ka hoʻohana ʻana i ka ikehu haʻahaʻa a me nā ʻōnaehana hoʻonui kiʻi kiʻi kiʻekiʻe. ʻAʻole kēia hana i hōʻoia wale ʻo GaOX he mea hoʻohiki photodetector kiʻekiʻe kiʻekiʻe, akā hāʻawi pū kekahi i kahi hoʻolālā hou no ka hoʻokō ʻana i nā kiʻi kiʻi kiʻekiʻe kiʻekiʻe.