Ahmet BİLGİLİ, Ömer AKPINAR, Naki KAYA, Mustafa ÖZTÜRK

Al 0.3 Ga 0.7 N/GaN HEMT Yapısı için QMSA Metodu Uygulanması

Bu çalışmada, Al0.3Ga0.7N/GaN yüksek elektron mobiliteli transistör (HEMT) yapısı, metal-organik buhar fazlı epitaksi (MOVPE) kullanılarak safir (Al2O3) bir alttaş üzerinde büyütülmüş, elektron taşıma ve manyetik taşıma özellikleri incelenmiştir. Özdirenç 20-350 K sıcaklık aralığında ölçülmüştür. Hall hareketliliği ve Hall taşıyıcı konsantrasyonu, 0-1,5 T manyetik alan aralığında ve aynı sıcaklık aralığında ölçülmüştür. Manyetik taşıma özellikleri, kantitatif hareketlilik spektrum analizi (QMSA) kullanılarak analiz edilmiştir. 2DEG ve 3DEG taşıma mekanizmaları QMSA sonuçları ile birbirinden ayrılmıştır.

Anahtar Kelimeler:

GaN, HEMT, AlGaN, QMSA, Hall, Mobilite

Application of QMSA Method for Al 0.3 Ga 0.7 N/GaN HEMT Structure

In this study, Al 0.3 Ga 0.7 N/GaN high electron mobility transistor (HEMT) structure is grown on a sapphire (Al2O3) substrate by using metal-organic vapor phase epitaxy (MOVPE), and its electron transport and magnetic transport properties are investigated. Resistivity is measured in the 20-350 K temperature range. Hall mobility and Hall carrier concentration are measured in the 0-1.5 T magnetic field range and the same temperature range. Magnetic transport properties are analyzed using quantitative mobility spectrum analysis (QMSA). 2DEG and 3DEG transport mechanisms are separated by using QMSA results.

Keywords:

GaN, HEMT, AlGaN, QMSA, Hall, Mobility,

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