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首页> 外文期刊>RSC Advances >Control of consistent ordering in π-conjugated polymer films for organic field-effect transistor applications
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Control of consistent ordering in π-conjugated polymer films for organic field-effect transistor applications

机译：控制π缀合的聚合物膜中一致的有机场效应晶体管应用中的顺序

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A novel conjugated copolymer, pDPP-(TV) _(2) B-2DO, including donor (D) and acceptor (A) blocks of (TV) _(2) B-2DO, 1,4-bis(( E )-2-(thiophen-2-yl)vinyl)benzene with dodecyloxy moieties and diketopyrrolopyrrole (DPP) derivatives, respectively, was synthesized by Stille-coupling polymerization. The 60 kDa pDPP-(TV) _(2) B-2DO showed good solubility in organic solvents and strong molecular interaction during film procedures. Semiconducting thin films were spun-cast on polymer-treated SiO _(2) from chloroform and annealed at temperatures ranging from 150 to 300 °C for 1 h. The electrical properties of these films in organic field-effect transistors (OFETs) were evaluated and correlated with π-conjugated ordering of the pDPP-(TV) _(2) B-2DO, before and after annealing. Featureless aggregates of the face-on copolymer by the bulky B-2DO in the D block were dominant in the as-spun film and transformed into ordered rods or fibrils containing highly ordered edge-on polymers on the substrates after annealing. In terms of π-conjugated ordering, the as-spun and 250 °C-annealed pDPP-(TV) _(2) B-2DO films contained highly-consistent chains with face-on and edge-on structures, respectively. The resulting OFETs yielded similar field-effect mobilities of 0.07 and 0.08 cm ~(2) V ~(?1) s ~(?1) , respectively, as well as on–off current ratios greater than 10 ~(6) and a threshold voltage near 0 V. Therefore, the π-overlap of edge-on semiconducting polymers on gate dielectrics was not necessary to enhance the electrical performance of OFETs, but the high consistency in chain ordering was very important.
机译：一种新型共轭共聚物，PDPP-（TV）_（2）B-2DO，包括供体（D）和受体（A）块（TV）_（2）B-2DO，1,4-BIS（（E）通过STILLE偶联聚合合成-2-（噻吩-2-基）苯基）苯与十二烷氧基部分和二酮吡咯（DIKETOPROLOLOLOLES（DIKETOPROLOLOLOLES）合成。 60kDA PDPP-（TV）_（2）B-2DO在有机溶剂中溶解度和薄膜手术期间的强分子相互作用。半导体薄膜在聚合物处理的SiO _（2）上循环循环，来自氯仿，在150至300℃的温度下退火1小时。评估这些膜在有机场效应晶体管（OFET）中的电性能，并与退火之前和之后的PDPP-（TV）_（2）B-2DO的π-缀合的排序相关。 D嵌段中的庞大B-2DO的面对面共聚物的无特性聚集在作为纺膜中占主导地位，并在退火后在基材上含有高度有序的边缘聚合物的有序杆或原纤维。就π-缀合的排序而言，AS-SPUN和250°C退火的PDPP-（TV）_（2）B-2DO膜分别包含高度一致的链，分别具有面对面和边缘结构。所得到的液体产生的场效应率分别为0.07和0.08cm〜（2）v〜（α1）S〜（α1），以及大于10〜（6）和a的开关电流比率阈值电压接近0 V。因此，不需要在栅极电介质上的边缘上的半导体聚合物的π重叠，以增强OFET的电性能，但链条排序的高一致性非常重要。

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