Recently, interfacial layer such as metal oxide, insulator and polymer have been used by scientists between the metal and semiconductor to increase the stability of the metal-semiconductor heterojunctions. These materials have been varied according to their usage aims. In this study, graphene nanoribbons (GNR) and 7,7,8,8 Tetracyanoquinodimethane (TCNQ, C12H4N4) layer has been used as interfacial layer between the metal and semiconductor for photodiode applications. The TCNQ layer collects and extracts more electrons in the interface of the device and is used as electron acceptor material for organic solar cells. Herein, we fabricated Al/p-Si/Al, Al/p-Si/TCNQ/Al and Al/p-Si/TCNQ:GNR/Al heterojunctions by physical vapor deposition technique. I-V measurements has been employed under dark and various light illumination conditions to show dielectric properties of the fabricated heterojunctions. From current-voltage characteristics, we calculated the electronic parameters such as ideality factor, barrier heights, series resistances and rise times. It can be concluded from overall results that TCNQ and TCNQ:GNR layers had a major impact on quality and can be considered as quite proper materials for optoelectronic applications.
Selcuk University BAP office
20211024.
Son yıllarda bilim insanları metal-yarıiletken heteroeklemlerinin dayanıklılığını arttırmak maksadıyla metal ile yarıiletken arasına metal oksit, yalıtkan veya da polimer tabakalar eklemektedirler. Bu malzemeler amaca göre değişiklik göstermektedir. Bu çalışma kapsamında, fotodiyot uygulamaları için metal ve yarı iletken arasında ara yüzey olarak grafen nanoribbon (GNR) ve 7,7,8,8 Tetrasiyaokuinodimetan-(Tetracyanoquinodimethane TCNQ, C12H4N4) katmanı kullanılmıştır. TCNQ katmanı, cihazın arayüzünde daha fazla elektron toplar ve çıkarır ve organik güneş pillerinde elektron alıcı malzeme olarak kullanılır. Daha sonra fiziksel buhar biriktirme yöntemiyle Al/p-Si/Al, Al/p-Si/TCNQ/Al ve Al/p-Si/TCNQ:GNR/Al heteroeklemleri elde edilmiştir. Elektriksel karakterizasyon kapsamında Akım-voltaj ölçümleri hem karanlık ortamda hemde farklı aydınlatma değerlerinde gerçekleştirilmiştir. Akım-voltaj karakteristiklerinden, idealite faktörü, bariyer yüksekliği, seri direnç ve yükselme zamanı gibi elektronik parametreler hesaplanmıştır. Sonuç olarak, TCNQ ve TCNQ:GNR katmanlarının kalite üzerinde büyük bir etkisi olduğu ve optoelektronik uygulamalar için oldukça uygun malzemeler olarak kabul edilebilebilir.
20211024.
Primary Language | English |
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Journal Section | Research Articles |
Authors | |
Project Number | 20211024. |
Publication Date | October 30, 2021 |
Submission Date | September 24, 2021 |
Published in Issue | Year 2021 Volume: 47 Issue: 2 |
Journal Owner: On behalf of Selçuk University Faculty of Science, Rector Prof. Dr. Hüseyin YILMAZ
Selcuk University Journal of Science Faculty accepts articles in Turkish and English with original results in basic sciences and other applied sciences. The journal may also include compilations containing current innovations.
It was first published in 1981 as "S.Ü. Fen-Edebiyat Fakültesi Dergisi" and was published under this name until 1984 (Number 1-4).
In 1984, its name was changed to "S.Ü. Fen-Edeb. Fak. Fen Dergisi" and it was published under this name as of the 5th issue.
When the Faculty of Letters and Sciences was separated into the Faculty of Science and the Faculty of Letters with the decision of the Council of Ministers numbered 2008/4344 published in the Official Gazette dated 3 December 2008 and numbered 27073, it has been published as "Selcuk University Journal of Science Faculty" since 2009.
It has been scanned in DergiPark since 2016.
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