Civa Kadmiyum Tellürüt Kızılötesi Foto Algılayıcıların Performans Parametrelerinin Simülasyonu

Yıl 2012, Cilt: 11 Sayı: 1, 41 - 66, 01.03.2012

Hasan Koçer Yılmaz Durna Murat Demir Önder Haluk Tekbaş

Öz

Anahtar Kelimeler

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Civa Kadmiyum Tellürüt Kızılötesi Foto Algılayıcıların Performans Parametrelerinin Simülasyonu

Öz

Termal görüntülemede, HgCdTe (Civa Kadmiyum Tellürüt) kızılötesi foto algılayıcılar hedefin yansıttığı/yaydığı IR ışımanın algılanması için yaygın olarak kullanılmaktadır. Bunların performansı/kalitesi kullanılan HgCdTe foto algılayıcının malzeme ve cihaz parametrelerine göre değişmektedir. Bu çalışmada, KOCERsim veya MCTsim adı verilen sayısal program geliştirilerek uzun dalga kızılötesi ışıma (LWIR) ve çok uzun dalga kızılötesi ışıma (VLWIR) bantlarındaki p-n tipi HgCdTe kızılötesi sensörün 77 K sıcaklıktaki elektriksel ve fotoelektriksel parametreleri incelenmektedir. KOCERsim programı doğrusal olmayan ve kuplajlı Poisson ve süreklilik denklemlerini çözmektedir. Difüzyon, ışıma, Auger, Shockley-Read Hall (SRH) ve tuzak-destekli tünelleme (TAT) mekanizmaları KOCERsim programına uygun olarak eklenmiştir. Bu mekanizmaların karanlık ve fotoakıma olan etkileri ters öngerilimleme, kesim dalga boyu, elektron/hol yakalanma kesit alanı, ömür süresi, tuzak yoğunluğu ve tuzak enerji seviyesine göre incelenmektedir

Anahtar Kelimeler

Simülasyon tabanlı tasarım, kızılötesi, foto algılayıcı, HgCdTe

Kaynakça

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