Effect of bulk and planar heterojunctions based charge generation layers on the performance of tandem organic light-emitting diodes
作者： Zhu Ma , Juan Zhao , Xu Wang , Junsheng Yu
DOI: 10.1016/J.ORGEL.2015.12.020
关键词: Fullerene 、 Tandem 、 Polymer solar cell 、 Electroluminescence 、 Optoelectronics 、 Heterojunction 、 OLED 、 Charge carrier 、 Materials science 、 Diode
摘要: Abstract Tandem organic light-emitting diodes (OLEDs) were fabricated using planar and bulk heterojunctions based charge generation layers (CGLs), which composed of cobalt phthalocyanine (CoPc) fullerene (C 60 ). The electroluminescent (EL) characteristics these two kinds devices systematically studied. results showed that, compared to the corresponding with heterojunction (PHJ) CGL, tandem OLEDs (BHJ) CGL exhibited a dramatic improvement performance. By investigating electrical CGLs, it was found that more hetero-interfaces introduced in BHJ blend beneficial for generating interfacial dipoles carriers, optimized transport pathways favorable promote both electron hole mobilities. As result, improved carrier balance led efficiency enhancement device demonstrated advantageous effect film rational design CGLs on realization high
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