{"product_id":"algan-gan-heterostructures-fabrication-and-electrical-characterization-von-michael-awaah","title":"AlGaN\/GaN Heterostructures: Fabrication and Electrical Characterization","description":"\u003cp\u003eGroup III-nitrides, in particular GaN and its heterostructures with AlGaN, have some unique electronic material properties that make these material systems almost ideally suited for the fabrication of a number of high-performance electronic and optoelectronic devices.                A study of MBE grown Al0.2Ga0.8N\/GaN heterostructures was conducted. Rectifying and ohmic contacts were fabricated for electrical characterization of the heterostructure. These contacts were fabricated by sputter deposition of metal films. A multi-layer Ti\/Al\/Ni\/Au (15\/60\/35\/50nm) metallization and subsequent anneal was employed to form ohmic contacts.  A contact resistivity of 2.0 x 10-3 Ohm.cm2 was obtained. Though this value was high but was expected of unintentionally doped n\/n Ni Al0.2Ga0.8N\/GaN unipolar heterostructure. Rectifying contacts were obtained by depositing Ni on the AlGaN\/GaN film, overcoated with Au (Ni\/Au, 20\/180nm). Fabricated HEMT devices exhibited transistor behavior with transconductance values between of 1.0 and 2.5 mS; however, saturation was not observed. A drift mobility ~130 cm2\/V.s was estimated from the calculated transconductance.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783838371818\"\u003e\u003ch3\u003eFabrication And Electrical Characterization Of AlGaN\/GaN HFETs\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783838371818","offer_id":39499091869789,"sku":"9783838371818","price":59.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/e45c4398-dece-4530-beb8-66a49129b9ae.jpg?v=1773122238","url":"https:\/\/shop.autorenwelt.de\/products\/algan-gan-heterostructures-fabrication-and-electrical-characterization-von-michael-awaah","provider":"Autorenwelt Shop","version":"1.0","type":"link"}