基于[Ru（bpy）3] 2+和Zn-Diphenylcarbazone的新混合物的低开启电压，高亮度和深红色发光电化学电池。,ACS Omega

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基于[Ru（bpy）3] 2+和Zn-Diphenylcarbazone的新混合物的低开启电压，高亮度和深红色发光电化学电池。
ACS Omega ( IF 3.7 ) Pub Date : 2018-08-28 , DOI: 10.1021/acsomega.8b01243
Hashem Shahroosvand ₁ , Leyla Heydari ₁ , Babak Nemati Bideh ₁ , Babak Pashaei ₁ , Sara Tarighi ₂ , Behrouz Notash ₃

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基于[Ru（bpy）3] 2+，阳离子配合物和基于二苯基咔a配体的中性Zn（II）配合物（称为Zn（DPCO））的混合物制备了深红色发光电化学电池。Zn（DPCO）2（bpy）]分子的晶体结构表明，DPCO配体已去质子化以形成DPCO-，并通过DPCO的C = O和N = N部分与Zn中心金属配位。从二苯卡巴肼（DPC）配体的循环伏安法结果和受控电库仑数据，可以确定DPC在+0.77 V的不可逆过程中被氧化，得到DPCO，随后在更高的电势（+1.32 V）下被氧化生产二苯基卡巴唑酮（DPCDO）。通过依赖于时间的密度泛函理论计算，对紫外-可见光谱期货进行了详细的确定，以确定基态和激发态跃迁的起源，这与实验结果具有很好的一致性。使用简单的设备架构，我们获得了高亮度（740 cd m-2）的深红色电致发光（EL），在2.5 V的低开启电压下发光效率为0.39 cd / A。该电池的良好配置包括仅将铟锡氧化物配合物的混合物作为阳极电极，将熔融合金阴极（Ga / In）的混合物作为载体，而没有任何聚合物作为传输层。[Ru（bpy）3] 2+和[Ru（bpy）3] 2 + / Zn（DPCO）的比较表明存在Zn（DPCO）时EL波长从625到700 nm发生红移，表明在未来系统中使用混合的重要性。

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Low-Turn-On-Voltage, High-Brightness, and Deep-Red Light-Emitting Electrochemical Cell Based on a New Blend of [Ru(bpy)3]2+ and Zn-Diphenylcarbazone.

Deep red light-emitting electrochemical cells were prepared based on a blend of [Ru(bpy)3]2+, a cationic complex, and a neutral Zn(II)-complex based on diphenylcarbazone ligands, named Zn(DPCO). The crystal structure of the Zn(DPCO)2 (bpy)] molecule revealed that the DPCO ligand has been deprotonated to form DPCO- and coordinated to the Zn center metal through the C=O and N=N moieties of DPCO. From the cyclic voltammetry results and controlled potential coulometry data of the diphenylcarbazide (DPC) ligand, it is possible to establish that DPC is oxidized in an irreversible process at +0.77 V, giving DPCO and later oxidized at a higher potential (+1.32 V) to produce diphenylcarbadiazone (DPCDO). A detailed assignment of UV-vis spectra futures to determine the origin of ground- and excited-state transitions was achieved by time-dependent density functional theory calculations, which showed good agreement with the experimental results. Using a simple device architecture, we obtained deep red electroluminescence (EL) with high brightness (740 cd m-2) and luminous efficiency of 0.39 cd/A at a low turn-on voltage of 2.5 V. The favorable configuration of the cell consists of only a blend of complexes of indium tin oxide as the anode electrode and molten alloy cathode (Ga/In) without any polymer as the transporting layer. The comparison between [Ru(bpy)3]2+ and [Ru(bpy)3]2+/Zn(DPCO) demonstrates a red shift in the EL wavelength from 625 to 700 nm in the presence of Zn(DPCO), revealing the importance of using blends for future systems.

更新日期：2018-08-28

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