https://scholars.lib.ntu.edu.tw/handle/123456789/598341
標題: | Solution Processable Pentafluorophenyl End-Capped Dithienothiophene Organic Semiconductors for Hole-Transporting Organic Field Effect Transistors | 作者: | CHENG-LIANG LIU et al. SHIH-HUANG TUNG et al. |
關鍵字: | dithienothiophene;organic semiconductors;organic transistor;perfluorophenyl;solution-processing;Density functional theory;Hole mobility;Red Shift;Bithiophenes;DFPT;Dithienothiophene;High mobility;Hole transporting;Organic field-effect transistors;Organic transistor;Perfluorophenyl;Solution processable;Solution-processing;Organic field effect transistors | 公開日期: | 2021 | 來源出版物: | Advanced Electronic Materials | 摘要: | Two solution-processable organic semiconductors, DFPT-DTTR (1) and DFPbT-DTTR (2), composed of pentafluorophenyl (FP) end-capped 3,5-dialkyl dithienothiophene (DTTR) core with thiophene (T) or bithiophene (bT) as π-bridged spacers are developed and investigated for their optical, electrochemical, microstructural, and electrical properties. With more conjugated bithiophene units, compound 2 exhibits a red-shifted UV–vis absorption band and upshifted HOMO/downshifted LUMO energy levels. According to the density functional theory, compound 2 features a more twisted molecular structure due to the intrinsic non-coplanar blocks in the π-backbones. Compound 1-based organic field effect transistors exhibit efficient hole transport with mobility up to 0.48?cm2 V?1 s?1. This is one of the high mobility organic semiconductors exhibiting p-channel characteristics based on solution-processable small molecular FP end-capped fused/oligothiophenes. With large and interconnected crystalline morphologies, decreased π–π stacking distance, and less steric hindrance, compound 1 exhibits two orders of magnitude higher mobility than the more distorted 2, which exhibits lower hole mobility of 1.82 × 10?3 cm2 V?1 s?1. ? 2021 Wiley-VCH GmbH |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119061537&doi=10.1002%2faelm.202100648&partnerID=40&md5=6f04ea911937a96eb5a1d4191feb65a1 https://scholars.lib.ntu.edu.tw/handle/123456789/598341 |
ISSN: | 2199160X | DOI: | 10.1002/aelm.202100648 |
顯示於: | 材料科學與工程學系 |
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