Absorptive and conductive cavity cathode with silver nanoparticles for low-reflection organic light-emitting devices
作者： Tien-Lung Chiu , Jiun-Haw Lee , Yi-Peng Hsiao , Chi-Feng Lin , Chun-Chieh Chao
DOI: 10.1088/0022-3727/44/9/095102
关键词: Visible spectrum 、 Group 2 organometallic chemistry 、 Optoelectronics 、 OLED 、 Reflection (mathematics) 、 Light-emitting diode 、 Materials science 、 Thin film 、 Absorption (electromagnetic radiation) 、 Cathode
摘要: We have successfully fabricated a low-reflection organic light-emitting diode (LR-OLED) by replacing the highly reflective Al cathode of conventional OLED with Fabry?P?rot (FP) cavity cathode, which is simultaneously responsible for absorption, plasmonic absorption and destructive interference. The FP consisted front semi-transparent double thin metal layer (Al/Ag), an inserted organometallic black (BL) in middle mirror. BL contained high-mobility electron transport broadband absorptive matrix, N,N'-bis(2,6-diisopropylphenyl)-1,7-bis(4-methoxy-phenyl)perylene-3,4,9,10-tetracarboxydiimide (MPPDI), Ag-nanoparticle (NP) dopants contributed not only to but also metallic conductivity. By adjusting thickness Ag-NP concentration BL, one can optimize interference effect. LR-OLEDs using aforementioned characteristics yielded superior electrical performance low reflection across almost entire visible spectrum. With exemption surface (air/glass ~4%), lowest 0% near 750?nm average 1.39% spectrum were obtained LR-OLED 65?nm (mixing ratio MPPDI?:?Ag = 10?:?1). additional structural nonetheless exhibited similar performances continuous operational lifetimes those control devices traditional cathode.
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