Stanculescu Anca, Socol Marcela, Rasoga Oana, Breazu Carmen, Preda Nicoleta, Stanculescu Florin, Socol Gabriel, Vacareanu Loredana, Girtan Mihaela, Doroshkevich Aleksandr S
Optical Processes in Nanostructured Materials Laboratory, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania.
Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Magurele, Romania.
Materials (Basel). 2021 Dec 13;14(24):7688. doi: 10.3390/ma14247688.
We investigated the optical and electrical properties of flexible single and bi-layer organic heterostructures prepared by vacuum evaporation with a p-type layer of arylenevinylene oligomers, based on carbazole, 3,3' bis(N hexylcarbazole)vinylbenzene = L13, or triphenylamine, 1,4 bis [4 (N,N' diphenylamino)phenylvinyl] benzene = L78, and an n-type layer of 5,10,15,20-tetra(4-pyrydil)21H,23H-porphyne = TPyP. Transparent conductor films of Al-doped ZnO (AZO) with high transparency, >90% for wavelengths > 400 nm, and low resistivity, between 6.9 × 10 Ω·cm and 23 × 10 Ω·cm, were deposited by pulsed laser deposition on flexible substrates of polyethylene terephthalate (PET). The properties of the heterostructures based on oligomers and zinc phthalocyanine (ZnPc) were compared, emphasizing the effect of the surface morphology. The measurements revealed a good absorption in the visible range of the PET/AZO/arylenevinylene oligomer/TPyP heterostructures and a typical injection contact behavior with linear (ZnPc, L78) or non-linear (L13) J-V characteristics in the dark, at voltages < 0.4 V. The heterostructure PET/AZO/L78/TPyP/Al showed a current density of ~1 mA/cm at a voltage of 0.3 V. The correlation between the roughness exponent, evaluated from the height-height correlation function, grain shape, and electrical behavior was analyzed. Consequently, the oligomer based on triphenylamine could be a promising replacement of donor ZnPc in flexible electronic applications.
我们研究了通过真空蒸发制备的柔性单双层有机异质结构的光学和电学性质，该异质结构具有基于咔唑的亚芳基乙烯基低聚物的p型层、3,3' - 双（N - 己基咔唑）乙烯基苯 = L13，或三苯胺、1,4 - 双[4 - （N，N' - 二苯胺基）苯基乙烯基]苯 = L78，以及n型层的5,10,15,20 - 四（4 - 吡啶基）21H，23H - 卟吩 = TPyP。通过脉冲激光沉积在聚对苯二甲酸乙二酯（PET）柔性基板上沉积了具有高透明度（波长> 400 nm时> 90%）和低电阻率（介于6.9×10Ω·cm和23×10Ω·cm之间）的Al掺杂ZnO（AZO）透明导电膜。比较了基于低聚物和锌酞菁（ZnPc）的异质结构的性质，重点强调了表面形态的影响。测量结果表明，PET/AZO/亚芳基乙烯基低聚物/TPyP异质结构在可见光范围内有良好的吸收，并且在黑暗中、电压< 0.4 V时具有典型的注入接触行为，其J - V特性为线性（ZnPc，L78）或非线性（L13）。异质结构PET/AZO/L78/TPyP/Al在0.3 V电压下的电流密度约为1 mA/cm²。分析了从高度 - 高度相关函数评估的粗糙度指数、晶粒形状和电学行为之间的相关性。因此，基于三苯胺的低聚物在柔性电子应用中可能是有前景的供体ZnPc替代物。
