Schottky Yapılar Üzerine İnceleme ve Analiz Çalışması

Year 2018, Volume: 21 Issue: 4, 977 - 989, 01.12.2018

Serhat Orkun Tan

https://doi.org/10.2339/politeknik.426648

Abstract

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.

Keywords

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

Review and Analysis Study on Schottky Structures

Abstract

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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