New high sensitivity photodetector

Zatsopanohigh sensitivity photodetector

Posachedwapa, gulu lofufuza ku Chinese Academy of Sciences (CAS) lochokera ku polycrystalline gallium-rich Gallium oxide Materials (PGR-GaOX) linakonza kwa nthawi yoyamba njira yatsopano yopangira tcheru kwambiri komanso kuthamanga kwambiri.Photodetectorkudzera mu mawonekedwe ophatikizika a pyroelectric ndi photoconductivity zotsatira, ndipo kafukufuku wofunikira adasindikizidwa mu Advanced Materials. Mphamvu zapamwambama photoelectric detectors(kwa deep ultraviolet (DUV) kupita ku X-ray band) ndizofunika kwambiri m'magawo osiyanasiyana, kuphatikizapo chitetezo cha dziko, mankhwala, ndi sayansi ya mafakitale.

Komabe, zida zamakono za semiconductor monga Si ndi α-Se zili ndi mavuto a kutayikira kwakukulu kwamakono ndi kutsika kwa X-ray mayamwidwe, zomwe zimakhala zovuta kukwaniritsa zofunikira zowunikira kwambiri. Mosiyana ndi izi, zida za wide-band gap (WBG) semiconductor gallium oxide zimawonetsa kuthekera kwakukulu pakuzindikira kwamagetsi amphamvu kwambiri. Komabe, chifukwa cha msampha wakuya wosalephereka kumbali ya zinthu komanso kusowa kwa kapangidwe kogwira mtima pamapangidwe a chipangizocho, ndizovuta kuzindikira kukhudzika kwakukulu komanso kuthamanga kwamphamvu kwambiri kutengera mphamvu zamagetsi zowunikira ma photon potengera ma semiconductors amitundu yosiyanasiyana. Pofuna kuthana ndi mavutowa, gulu lofufuza ku China lapanga pyroelectric photoconductive diode (PPD) yochokera ku PGR-GaOX kwa nthawi yoyamba. Mwa kuphatikiza mawonekedwe a pyroelectric effect ndi photoconductivity effect, ntchito yodziwikiratu imakhala yabwino kwambiri. PPD inasonyeza kukhudzidwa kwakukulu kwa DUV ndi X-ray, ndi kuyankha kwa 104A / W ndi 105μC × Gyair-1 / cm2, motsatira, nthawi zoposa 100 kuposa zowunikira zam'mbuyomu zopangidwa ndi zipangizo zofanana. Kuonjezera apo, mawonekedwe a pyroelectric effect chifukwa cha symmetry ya polar ya PGR-GaOX yochepetsetsa dera imatha kuonjezera kuthamanga kwa detector ndi nthawi 105 mpaka 0.1ms. Poyerekeza ndi ma photodiodes ochiritsira, PPDS yodzipangira yokha imapanga zopindulitsa kwambiri chifukwa cha minda ya pyroelectric pakusintha kwa kuwala.

Kuonjezera apo, PPD ikhoza kugwira ntchito motsatira ndondomeko, pomwe phindu limadalira kwambiri mphamvu yowonongeka, ndipo kupindula kwakukulu kungapezeke mwa kuwonjezera mphamvu yamagetsi. PPD ili ndi kuthekera kwakukulu kogwiritsa ntchito mphamvu zochepa komanso makina olimbikitsira malingaliro apamwamba. Ntchitoyi sikungotsimikizira kuti GaOX ndiyodalirikamkulu mphamvu photodetectorzakuthupi, komanso imapereka njira yatsopano yodziwira ma photodetectors apamwamba kwambiri amphamvu.