共軛分子自身結(jié)構(gòu)轉(zhuǎn)變對(duì)結(jié)晶形貌及電學(xué)性能的影響
發(fā)布時(shí)間:2018-01-06 18:11
本文關(guān)鍵詞:共軛分子自身結(jié)構(gòu)轉(zhuǎn)變對(duì)結(jié)晶形貌及電學(xué)性能的影響 出處:《液晶與顯示》2017年06期 論文類型:期刊論文
更多相關(guān)文章: 共軛分子 分子自組裝 遷移率 場(chǎng)效應(yīng)晶體管
【摘要】:在共軛光電材料的應(yīng)用中,材料的溶解度決定著其加工性能,而分子規(guī)則的自組裝排列對(duì)于其在固態(tài)中的結(jié)晶性起著重要作用。然而如何保證材料同時(shí)具有高的溶解度和結(jié)晶性是目前共軛有機(jī)半導(dǎo)體研究的一個(gè)難點(diǎn)。本工作選擇兩個(gè)相似共軛分子進(jìn)行研究,其中:一個(gè)是平面結(jié)構(gòu),另一個(gè)是扭曲結(jié)構(gòu)。結(jié)果發(fā)現(xiàn)扭曲結(jié)構(gòu)分子不僅溶解度比平面結(jié)構(gòu)分子大,而且在固態(tài)狀態(tài)下,會(huì)自發(fā)轉(zhuǎn)變成平面結(jié)構(gòu)獲得更好的結(jié)晶性。進(jìn)一步研究分子薄膜器件的微納結(jié)構(gòu)對(duì)電學(xué)性能的影響。結(jié)果表明扭曲分子的場(chǎng)效應(yīng)晶體管性能優(yōu)于平面分子,遷移率達(dá)到6.73×10~(-3)cm~2/V·s,比平面分子薄膜的遷移率高出一個(gè)數(shù)量級(jí)。本文揭示分子結(jié)構(gòu)、聚集態(tài)結(jié)構(gòu)與電學(xué)性能之間的關(guān)系,為未來(lái)設(shè)計(jì)合成高效共軛分子提供了新思路。
[Abstract]:In the application of conjugate optoelectronic materials, the solubility of the materials determines their processing performance. The regular self-assembly of molecules plays an important role in the crystallization of solid materials. However, how to ensure the high solubility and crystallinity of the materials is a difficult point in the study of conjugated organic semiconductors. Two similar conjugate molecules were selected for study. One of them is planar structure and the other is twisted structure. It is found that twisted structure molecule is not only more soluble than planar structure molecule, but also in solid state. The effect of microstructures on electrical properties of molecular thin film devices is further studied. The results show that the field effect transistors of twisted molecules are superior to those of planar molecules. The mobility is 6.73 脳 10 ~ (-3) C ~ (-1) V 路s, which is an order of magnitude higher than that of planar molecular thin films. The relationship between molecular structure, aggregation structure and electrical properties is revealed in this paper. It provides a new idea for the design and synthesis of highly efficient conjugated molecules in the future.
【作者單位】: 北京交通大學(xué)理學(xué)院光電子技術(shù)研究所;
【基金】:博士后面上基金(No.2015M570923) 博士后特別資助(No.2016T90030)~~
【分類號(hào)】:TN304.5
【正文快照】: 在最近的十多年中,基于共軛聚合物和小分子的有機(jī)光電器件取得了長(zhǎng)足的發(fā)展[1-6],例如有機(jī)太陽(yáng)能電池[7-9],場(chǎng)效應(yīng)晶體管[10-11],探測(cè)器[12-13]等。大量的有機(jī)半導(dǎo)體材料被合成和研究,然而為了進(jìn)一步提高有機(jī)光電器件的效果和性能并最終實(shí)現(xiàn)商業(yè)化應(yīng)用,還需要能夠?qū)Σ牧辖Y(jié)構(gòu)與
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