Zhu Mingpeng, Yuan Xueting, Ni Gang
Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China.
Shanghai Engineering Research Center for Ultra-Precision Optical Manufacturing, Fudan University, Shanghai 200433, China.
Micromachines (Basel). 2019 Aug 17;10(8):546. doi: 10.3390/mi10080546.
Magnetic field effects (MFE) have been extensively studied in organic light emitting diodes because of their potential application in organic spintronics devices. However, only a few studies on MFE in organic light-emitting electrochemical cells (LEC) have been reported. In this paper, magnetic field effects on the electroluminescence of an LEC device with the structure of ITO/MEH-PPV:PEO:LiCFSO/Al were studied at various temperatures. The luminance-current-voltage curves of the device shows the typical bi-polar characteristics of LECs; positive magnetic electroluminescence (MEL) was observed with a value of about 2.5% (B = 42 mT, 250 K), showing a Lorentzian line shape. With a decrease in temperature, the MEL value and the threshold voltage increased accordingly, below the possible mechanism is discussed.
由于磁场效应（MFE）在有机自旋电子器件中的潜在应用，其在有机发光二极管中已得到广泛研究。然而，关于有机发光电化学电池（LEC）中MFE的研究报道却很少。本文研究了在不同温度下，磁场对具有ITO/MEH-PPV:PEO:LiCFSO/Al结构的LEC器件电致发光的影响。该器件的亮度-电流-电压曲线呈现出LEC典型的双极特性；观察到正向磁电致发光（MEL），其值约为2.5%（B = 42 mT，250 K），呈现出洛伦兹线型。随着温度降低，MEL值和阈值电压相应增加，下面讨论其可能的机制。
