Schottky Yapılar Üzerine İnceleme ve Analiz Çalışması

Yüksek sıcaklık ve vakum altında metal ve yarı iletkenlerin sıkı kontak edilmesi durumunda oluşan metal-yarı iletken kontaklar üzerinde hala çok sayıda teorik ve deneysel çalışma yapılıyor olmasına rağmen metal ve yarı iletken arasındaki bariyerin oluşumu ve iletimi mekanizmaları henüz tam olarak aydınlatılmamıştır. Bu yapılar hakkında yapılan ilk detaylı çalışmalar W. Schottky tarafından yapıldığından, bu metal-yarı iletken kontaklar genellikle Schottky diyotlar/yapılar olarak bilinir. Geçmişten günümüze farklı fiziksel, kimyasal ve elektriksel özelliklere sahip çeşitli malzemeler kullanılarak arayüzey tabakalar olmaksızın veya yalıtkan, polimer ve ferroelektrik gibi arayüzey tabakalar içeren Schottky yapıların performansı arttırılmaya çalışılmıştır. Çok yüksek frekanslarda ve düşük ileri ön gerilimde çalışabilmesi ve çok hızlı anahtarlama kabiliyeti gibi diğer diyotlarda bulunmayan özellikleri, elektronik teknolojideki yaygın kullanımı ve gelişime açık teknolojiye sahip olması bilim insanlarını Schottky yapıları üzerinde çalışmaya teşvik etmektedir. Bu çalışmada, metal yarıiletken ve arayüzey tabakasına sahip metal yarıiletken Schottky yapıların bu alanda yapılan bilimsel çalışmalar da göz önüne alınarak incelenmesi, zaman içindeki gelişiminin gözlenmesi ile birlikte dünya ve Türkiye’de bu alanda yapılan akademik çalışmaların istatistiksel analizi yapılmıştır. Sonuçta, Türkiye'nin bilimsel çalışmalar bakımından dünyanın neresinde olduğunu açığa çıkartmak amaçlanmıştır. Aynı zamanda farklı MY yapılar üzerine yapılmış bilimsel çalışmaların Türkiye ve dünyada ne oranda karşılık gördüğü de ortaya konulmuştur. Web of Science veri tabanında Science Citation Index (SCI) tarafından taranan ve hem Türkiye’de hem de tüm dünyada yapılan akademik çalışmaların analizi veri madenciliği ile otomatik veri toplama yöntemleri ve Structured Query Language (SQL) sunucu yönetim stüdyosu programı kullanılarak yapılmıştır. İstatistiksel analiz sonuçları her alanda Schottky yapılar üzerine Türkiye ve dünyada yapılan akademik çalışmaların nerede ise her sene artış gösterdiğini göstermektedir.

Anahtar Kelimeler:

Schottky yapı, MY schottky yapılar, arayüzey tabakalı schottky yapılar, veri madenciliği, istatistiksel analiz

Review and Analysis Study on Schottky Structures

Although quite a few number of theoretical and experimental studies are still carried out on metal-semiconductor contacts which forms in case of a tight contact of metal and semiconductor under high temperature and vacuum, the formation and transmission mechanisms of the barrier between metal and semiconductor have not yet been fully elucidated. Since the initial detailed studies about these structures were made by W. Schottky, these metal-semiconductor contacts are generally known as Schottky diodes/structures. It has been tried to improve the performance of the Schottky structures without or with interfacial layers such as insulator or polymer and ferroelectric by using various materials with different physical, chemical and electrical properties from past to present. The significant features not found in other diodes, such as its ability to operate at very high frequencies and low forward bias, and very fast switching capability, the widespread use in electronic technology, and the fact that its technology is open for development encourage scientists to study on Schottky structures. Together with the investigation of the metal-semiconductor and the metal-semiconductor with interfacial layer Schottky structures by considering the scientific studies on Schottky structures, the observation of its progress over time, the statistical analysis of academic studies in this area over the world and Turkey have been made in this study. Ultimately, it is aimed to reveal the situation of Turkey over the world in terms of scientific studies. At the same time, to what extent the scientific studies on distinct MS structures get reciprocity in the world and in Turkey is set forth. The analysis of the academic studies which are scanned by Science Citation Index (SCI) in Web of Science database and made in Turkey as well as all over the world were performed with data mining by utilizing automated data collection methods and SQL Server Management Studio program. The statistical analysis results indicate that the academic studies made for every type of Schottky structures over the world and Turkey increase for almost every year.

Keywords:

Schottky structures, MS schottky structures, interfacial layered schottky structures, data mining, statistical analysis,

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