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Title: Diacenopentalene dicarboximides as new n-type organic semiconductors for field-effect transistors
Authors: Dai, G
Chang, J 
Jing, L
Chi, C 
Keywords: Cyclic voltammetry
Density functional theory
Differential scanning calorimetry
Organic field effect transistors
Thermogravimetric analysis
Decomposition temperature
Electronic absorption spectra
N-type organic semiconductor
Semiconducting materials
Time dependent density functional theory calculations
UV-vis absorptions
Voltammetry measurements
Field effect transistors
Issue Date: 2016
Citation: Dai, G, Chang, J, Jing, L, Chi, C (2016). Diacenopentalene dicarboximides as new n-type organic semiconductors for field-effect transistors. Journal of Materials Chemistry C 4 (37) : 8758-8764. ScholarBank@NUS Repository.
Abstract: N,N?-Dihexyl-dibenzopentalene dicarboximide (DBPDI) and N,N?-dioctyl-dinaphthopentalene dicarboximide (DNPDI) were successfully synthesized as new n-type semiconducting materials. They have good solubility in common organic solvents. DBPDI and DNPDI are thermally stable, with decomposition temperatures at 419 and 460 °C, respectively, based on thermogravimetric analysis, and melt at 354 and 387 °C as measured by differential scanning calorimetry. Their optical and electrochemical properties were studied by UV-vis absorption and cyclic voltammetry measurements. Time-dependent density functional theory calculations (TDDFT) were used to explain their unique electronic absorption spectra. DBPDI and DNPDI have relatively low-lying LUMO energy levels at -3.76 eV and -3.45 eV and HOMO energy levels at -5.84 eV and -5.72 eV, respectively. Their application in organic field-effect transistors (FETs) was investigated. Both DBPDI and DNPDI showed n-type field-effect transistor behavior. The DBPDI device obtained by solution-processing technique displayed an average electron mobility of up to 0.06 cm2 V-1 s-1 with an Ion/Ioff ratio of 2.9 × 106. © 2016 The Royal Society of Chemistry.
Source Title: Journal of Materials Chemistry C
ISSN: 20507534
DOI: 10.1039/c6tc02601j
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