Design and Characterization of Efficient Semiconductor for Use in Organic Field Effect Transistors

Publish Year: 1397
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

ISPTC21_020

تاریخ نمایه سازی: 30 دی 1397

Abstract:

Optoelectronic devices based on organic semiconductors (OSCS) have emerged as atechnology that can be potentially utilized in wide range applications, such as organic lightemitting diodes (OLEDs), photovoltaic cells, and organic field effect transistors (OFETs). Fieldeffect transistors are the main logic units in electronic circuits, where they usually function aseither a switch or an amplifier. OFETs have been mainly based on two types of semiconductors:conjugated polymers and small conjugated molecules. Accordingly, numerous OSCs have beendesigned and synthesized as the semiconducting materials in OFETs [1-3]. The building blockstructure of these OSCs consists of donor, acceptor, and π-conjugated bridges which can bealtered with the aim of designing the most promising OSC. In this context, based on a veryrecent experimental synthesis of banana shaped OSCs for OFETs [4], we theoretically designeddifferent sets of small molecules with improved efficiency. The rate constant of hopping and itsvariables such as reorganization energy and transfer integral have been systematically calculatedfor the designed OSCs. Moreover, hole and electron mobility within the predicted OSCs areevaluated. Owing to the promise represented in utilize of computational chemistry, we havesystematically explored the structural, electronic, optical, and transport properties of theseproposed small molecules.

Keywords:

Organic Semiconductor , Organic Field Effect Transistor , Mobility , Hopping

Authors

Afshan Mohajeri

Department of Chemistry, College of Sciences, Shiraz University, Shiraz, Iran