Mea ʻike kiʻi kiʻekiʻe hou

Houmea ʻike kiʻi kiʻekiʻe

I kēia manawa koke nei, ua hāpai kahi hui noiʻi ma ka Chinese Academy of Sciences (CAS) e pili ana i nā polycrystalline gallium-rich Gallium oxide Materials (PGR-GaOX) no ka manawa mua i kahi hoʻolālā hoʻolālā hou no ka ʻike kiʻekiʻe a me ka wikiwiki pane kiʻekiʻe.mea ʻike kiʻima o nā hopena pyroelectric a me photoconductivity i hoʻopili ʻia, a ua paʻi ʻia ka noiʻi pili ma Advanced Materials. Ikehu kiʻekiʻenā mea ʻike photoelectric(no nā kāʻei ultraviolet hohonu (DUV) a i nā kāʻei X-ray) he mea koʻikoʻi ia ma nā 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 he mau pilikia o ke au leaka nui a me ka coefficient absorption X-ray haʻahaʻa, kahi mea paʻakikī ke hoʻokō i nā pono o ka ʻike ʻana i ka hana kiʻekiʻe. I ka hoʻohālikelike ʻana, hōʻike nā mea semiconductor gallium oxide ākea-band gap (WBG) i ka hiki ke loaʻa ka ʻike photoelectric ikehu kiʻekiʻe. Eia nō naʻe, ma muli o ka pahele pae hohonu hiki ʻole ke pale ʻia ma ka ʻaoʻao mea a me ka nele o ka hoʻolālā kūpono ma ke ʻano o ka hāmeʻa, he mea paʻakikī ke hoʻomaopopo i ka ʻike kiʻekiʻe a me ka wikiwiki pane kiʻekiʻe i nā mea ʻike photon ikehu kiʻekiʻe e pili ana i nā semiconductors ākea-band gap. No ka hoʻoponopono ʻana i kēia mau pilikia, ua hoʻolālā kahi hui noiʻi ma Kina i kahi diode photoconductive pyroelectric (PPD) e pili ana iā PGR-GaOX no ka manawa mua. Ma ka hoʻopili ʻana i ka hopena pyroelectric interface me ka hopena photoconductivity, ua hoʻomaikaʻi nui ʻia ka hana ʻike. Ua hōʻike ʻo PPD i ka ʻike kiʻekiʻe i nā DUV a me nā X-ray, me nā helu pane a hiki i 104A/W a me 105μC × Gyair-1/cm2, kēlā me kēia, 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, ʻo ka hopena pyroelectric interface i hoʻokumu ʻia e ka symmetry polar o ka ʻāpana depletion PGR-GaOX hiki ke hoʻonui i ka wikiwiki o ka pane o ka mea ʻike ma 105 mau manawa i 0.1ms. Ke hoʻohālikelike ʻia me nā photodiodes maʻamau, ʻo ke ʻano PPDS i hoʻoikaika ponoʻī ʻia e hana i nā loaʻa kiʻekiʻe ma muli o nā kahua pyroelectric i ka wā o ka hoʻololi ʻana i ke kukui.

Eia kekahi, hiki iā PPD ke hana ma ke ʻano bias, kahi e hilinaʻi nui ai ka loaʻa ma ka voltage bias, a hiki ke hoʻokō ʻia ka loaʻa ultra-kiʻekiʻe ma ka hoʻonui ʻana i ka voltage bias. Loaʻa iā PPD ka hiki ke hoʻohana nui ʻia i ka hoʻohana ʻana i ka ikehu haʻahaʻa a me nā ʻōnaehana hoʻonui kiʻi kiʻekiʻe. ʻAʻole wale kēia hana e hōʻike ana he mea hoʻohiki ʻo GaOXmea ʻike kiʻi ikehu kiʻekiʻemea, akā hāʻawi pū kekahi i kahi hoʻolālā hou no ka hoʻokō ʻana i nā photodetectors ikehu kiʻekiʻe hana kiʻekiʻe.