Gawo la GaAs
Kufotokozera
Gallium Arsenide (GaAs) ndi gulu lofunikira komanso lokhwima la III-Ⅴ pawiri semiconductor, lomwe limagwiritsidwa ntchito kwambiri pankhani ya optoelectronics ndi ma microelectronics.Ma GaAs amagawidwa m'magulu awiri: ma semi-insulating GaAs ndi N-type GaAs.Ma semi-insulating GaAs amagwiritsidwa ntchito makamaka kupanga mabwalo ophatikizika okhala ndi MESFET, HEMT ndi ma HBT, omwe amagwiritsidwa ntchito mu radar, ma microwave ndi ma millimeter wave kulumikizana, makompyuta othamanga kwambiri komanso kulumikizana kwa fiber.Ma GaA amtundu wa N amagwiritsidwa ntchito makamaka mu LD, LED, pafupi ndi ma lasers a infrared, quantum well-high-power lasers komanso ma cell a solar amphamvu kwambiri.
Katundu
| Crystal | Wadodometsedwa | Mtundu Woyendetsa | Kukhazikika kwa Flows cm-3 | Kachulukidwe cm-2 | Njira Yakukula |
| Gas | Palibe | Si | / | <5×105 | LEC |
| Si | N | > 5 × 1017 | |||
| Cr | Si | / | |||
| Fe | N | ~ 2 × 1018 | |||
| Zn | P | > 5 × 1017 |
Tanthauzo la Gawo la GaAs
Gawo laling'ono la GaAs limatanthawuza gawo lapansi lopangidwa ndi kristalo wa gallium arsenide (GaAs).GaAs ndi semiconductor yopangidwa ndi gallium (Ga) ndi zinthu za arsenic (As).
Magawo a GaAs amagwiritsidwa ntchito nthawi zambiri pazinthu zamagetsi ndi ma optoelectronics chifukwa cha zinthu zabwino kwambiri.Zina mwazinthu zazikulu zamagawo a GaAs ndi awa:
1. Kuyenda kwa elekitironi yapamwamba: Ma GaAs ali ndi kayendedwe kapamwamba ka electron kuposa zipangizo zina zodziwika bwino za semiconductor monga silicon (Si).Khalidweli limapangitsa gawo laling'ono la GaAs kukhala loyenera pazida zamagetsi zamagetsi zothamanga kwambiri.
2. Direct band gap: Ma GaAs ali ndi kusiyana kwa bandi mwachindunji, zomwe zikutanthauza kuti kutulutsa bwino kwa kuwala kumatha kuchitika pamene ma electron ndi mabowo akuphatikizana.Khalidweli limapangitsa magawo a GaA kukhala abwino kwa optoelectronic applications monga ma light emitting diode (LED) ndi ma lasers.
3. Wide Bandgap: GaAs ili ndi bandgap yotakata kuposa silicon, yomwe imawathandiza kuti azigwira ntchito pa kutentha kwakukulu.Katunduyu amalola zida zochokera ku GaAs kuti zizigwira ntchito bwino m'malo otentha kwambiri.
4. Phokoso laling'ono: Magawo a GaAs amawonetsa phokoso lochepa, kuwapanga kukhala oyenera ma amplifiers otsika ndi zida zina zamagetsi zamagetsi.
Magawo a GaAs amagwiritsidwa ntchito kwambiri pazida zamagetsi ndi ma optoelectronic, kuphatikiza ma transistors othamanga kwambiri, ma microwave Integrated circuits (ICs), ma cell photovoltaic, photon detectors, ndi ma cell a dzuwa.
Magawo awa amatha kukonzedwa pogwiritsa ntchito njira zosiyanasiyana monga Metal Organic Chemical Vapor Deposition (MOCVD), Molecular Beam Epitaxy (MBE) kapena Liquid Phase Epitaxy (LPE).Njira yeniyeni ya kukula yomwe imagwiritsidwa ntchito imadalira ntchito yomwe mukufuna komanso zofunikira za gawo lapansi la GaAs.
