Spontaneously formed high-performance charge-transport layers of organic single-crystal semiconductors on precisely synthesized insulating polymers
Spontaneously formed high-performance charge-transport layers of organic single-crystal semiconductors on precisely synthesized insulating polymers
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DOI：
10.1063/1.4981774
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发表时间：
2017-04
影响因子：
4
通讯作者：
T. Makita;Masayuki Sasaki;Tatsuro Annaka;Mari Sasaki;H. Matsui;C. Mitsui;S. Kumagai;S. Watanabe-S.-Watanab
中科院分区：
文献类型：
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作者：
T. Makita;Masayuki Sasaki;Tatsuro Annaka;Mari Sasaki;H. Matsui;C. Mitsui;S. Kumagai;S. Watanabe-S.-Watanab
高性能有机晶体管所需的具有高载流子迁移率和低陷阱密度的电荷传输半导体层作为热力学相分离的结果而自发地形成，所述热力学相分离来自溶解在芳香族溶剂中的π-共轭小分子和精确合成的绝缘聚合物的共混物。晶体膜在温度、浓度和气氛的临界条件下连续生长到厘米大小。事实证明，绝缘聚合物的分子量在相分离边界处的稳定膜生长和界面均匀性中起着至关重要的作用。直接在半导体-绝缘体边界制备晶体管器件，我们证明了3，11-二癸基二萘并[2，3-d：2′，3 ′-d′]苯并[1，2-B：4，5-B′]二噻吩和具有优化重均分子量的聚甲基丙烯酸甲酯的混合物显示出优异的器件性能。采用一步制备工艺实现了自发相分离。
Charge-transporting semiconductor layers with high carrier mobility and low trap-density, desired for high-performance organic transistors, are spontaneously formed as a result of thermodynamic phase separation from a blend of π-conjugated small molecules and precisely synthesized insulating polymers dissolved in an aromatic solvent. A crystal film grows continuously to the size of centimeters, with the critical conditions of temperature, concentrations, and atmosphere. It turns out that the molecular weight of the insulating polymers plays an essential role in stable film growth and interfacial homogeneity at the phase separation boundary. Fabricating the transistor devices directly at the semiconductor-insulator boundaries, we demonstrate that the mixture of 3,11-didecyldinaphtho[2,3-d:2′,3′-d′]benzo[1,2-b:4,5-b′]dithiophene and poly(methyl methacrylate) with the optimized weight-average molecular weight shows excellent device performances. The spontaneous phase separation with a one-step fabrication pr...