General application of blade coating to small-molecule hosts for organic light-emitting diode

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/100988

Title:	General application of blade coating to small-molecule hosts for organic light-emitting diode
Authors:	陳錦地;Chang, Hao-Wen;Lee, Yi-Ting;Tseng, Mei-Rurng;Jang, Meng-Hao;Yeh, Han-Cheng;Luo, Fang-Tsai;Meng, Hsin-Fei;Chen, Chin-Ti;Chi, Yun;Qiu, Yong;Duan, Lian;Lin, Hao-Wu;Horng, Sheng-Fu;Zan, Hsiao-Wen
Contributors:	理學院化學學系
Keywords:	Application fields;Applied sciences;Balancing;Blade coating;Electronics;Emission;Exact sciences and technology;Film thickness;Multilayers;Optoelectronic devices;Organic light emitting diodes;Phosphorescence;Polymer industry, paints, wood;Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices;Solution process;Surface roughness;Technology of polymers;Vacuum evaporation
Date:	2014-01-01
Issue Date:	2026-04-21 14:20:20 (UTC+8)
Publisher:	Elsevier BV;Amsterdam: Elsevier B.V
Abstract:	摘要： •We compete five small molecular hosts for blue OLEDs via blade coating process.•Blade coating gives low roughness around 0.2nm thin film to the emitter layers.•The film thickness variance is about 10% in the area of 2cm by 3cm.•Adding electron-transporting material in emission layer improve carrier balance.•Molecular shape leads to different efficiency in blade coating and evaporation. Blade coating is applied to multi-layer phosphorescent OLED with five small-molecule hosts for the emission layer, including bis[3,5-di (9H-carbazol-9-yl)phenyl]diphenylsilane (SimCP2), 2,6-bis(3-(9H-carbazol-9-yl)phenyl) pyridine (26DCzPPy), 4,4′,4″-tris-(N-carbazolyl)-triphenylamine (TCTA), 9,9-bis[4-(3,6-di-tert-butylcarbazol-9-yl)phenyl]fluorene (TBCPF), and 2,7-bis(diphenylphosphoryl)-9,9′-spirobi[fluorene] (SPPO13). In general, blade coating gives low surface roughness around 0.2nm without phase separation of the emitter and the host. In the large area of 2cm by 3cm the film thickness distribution is within 10% and uniform light-emission is achieved. 1,3-Bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene (OXD-7) is added to tune the electron transport. Among all the hosts, 26DCzPPy and SimCP2 have by far the best electron–hole balance and consequently show the highest efficiency. For SimCP2, the maximal efficiency is 15.8cd/A for blue and 24.2cd/A for white emission. The order of efficiencies for the hosts is found to be quite different from the order in vacuum evaporation for the same device structures. 出版者： Amsterdam: Elsevier B.V 出版日期： 2014-10-01 出處： Synthetic metals, 2014-10, Vol.196, p.99-109 版權： 2014 Elsevier B.V. 版權： 2015 INIST-CNRS 識別號： ISSN: 0379-6779 識別號： EISSN: 1879-3290 識別號： DOI: 10.1016/j.synthmet.2014.07.003 識別號： CODEN: SYMEDZ
Appears in Collections:	[Department of Chemistry] journal & Dissertation

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