Degradation Analysis of Organic Light-Emitting Diodes through Dispersive Magneto-Electroluminescence Response

• DOI: 10.1021/acsami.2c20070
• Publication Date: 2023-02-07T21:05:47Z
• Authors: Amit Kumar Mondal; Xin Pan; Ohyun Kwon; Zeev Valy Vardeny
• Keywords: Degradation; Active layer

Understanding the stability and degradation of organic light-emitting diodes (OLEDs) under working conditions is a significant area research for developing more effective OLEDs further improving their performance. However, studies processes by in situ noninvasive methods have not been adequately developed. In this work, tris-(8-hydroxyquinolino) aluminum (Alq3)-based OLED analyzed through investigation device dispersive magneto-electroluminescence (MEL(B)) response measured at room temperature. By studying change MEL(B) during different external stimuli, such as exposing to atmosphere prolonged illumination strong visible light source, we gained insight into microscopic spin-dependent phenomena that control recombination e–h polaron pairs device. We found leads shorter lifetime, smaller parameter, broader lifetime distribution function shows increased disorder active layer. This study could offer potential tool may be beneficial assessing devices based on various layers.