We describe the synthesis, characterization and field effect transistor (FET) properties of a series of furan-based conjugated oligomers such as unsubstituted, hexyl- and styryl-capped linear oligofurans and oligofuran-substituted anthracene derivatives. All studied oligofurans show high fluorescence and good thermal stability. Top contact organic FETs (OFETs) fabricated with oligofurans as the active layer show hole mobilities (∼0.01 to 0.07 cm2 V−1 s−1) and on/off ratios (104 to 106) on a par with the corresponding oligothiophene analogues, while the threshold voltages displayed by oligofuran-based OFETs are significantly reduced due to higher HOMO energies as compared to those of oligothiophenes. Electroluminescence observed in oligofuran-based OFETs in a bottom-contact geometry is limited by electron injection. Overall, we find that furan building blocks are excellent candidates for replacing thiophene in optoelectronic materials.
我们介绍了一系列
呋喃基共轭低聚物的合成、表征和场效应晶体管 (FET) 特性,如未取代的、己基和
苯乙烯基封端线性低聚
呋喃以及低聚
呋喃取代的
蒽衍
生物。所有研究的低聚
呋喃都具有高荧光和良好的热稳定性。以低聚
呋喃为活性层制造的顶接触有机场效应晶体管(OFET)的空穴迁移率(0.01 至 0.07 cm2 V-1 s-1)和导通/截止比(104 至 106)与相应的低聚
噻吩类似物相当,而与低聚
噻吩相比,由于低聚
呋喃的 HOMO 能量较高,其阈值电压显著降低。在底部接触几何中观察到的低聚
呋喃基 OFET 的电致发光受到电子注入的限制。总之,我们发现
呋喃结构单元是替代光电材料中
噻吩的绝佳候选物质。