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P‐183: Efficient Deep Blue, Blue, Green, Yellow, Reddish‐Orange and Red Organic Light‐Emitting Device using 2,7‐Dipyrenespirofluorene (DPSF) as a Fluorescent Emitting Host
Author(s) -
Yen FengWen,
Chiu ChaoYu,
Lin IFeng,
Teng ChinMing,
Lin XinHong
Publication year - 2007
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2785450
Subject(s) - oled , orange (colour) , materials science , rubrene , fluorescence , optoelectronics , homo/lumo , deep blue , photochemistry , chemistry , nanotechnology , optics , organic chemistry , molecule , physics , food science , layer (electronics)
Deep blue, blue, green, yellow, reddish‐orange organic light‐emitting device have been fabricated using the same emitting host 2,7‐dipyrenespirofluorene(DPSF). The different guests doped in DPSF are 2,2′‐Bis[(9,9′‐dimethyl‐9H‐fluoren‐2‐yl)‐(diphenyl) amino]spirofluorene(BFDSF) (deep blue), 2,6‐Bis[4‐(4‐methyldiphenylamino) styryl]naphthyl (BDSN) (blue), C545T (green), Rubrene (yellow), DCJTB (reddish‐orange). And deposit the same hole transporting material, 9,9‐Bis[4‐di(naphth‐2‐yl)aminophenyl] fluorene (BNAPF) and the same electron transporting material, 1,3‐Bis[2‐(2,2′‐bipyridine‐6‐yl)‐1,3,4‐oxadiazol‐5‐yl]benzene(Bpy‐OXD). All OLED devices exhibit excellent current efficiency and Commission Internationale de I'Eclairage coordinates at a current density of 20mA/cm 2 , are shown as 4.5cd/A, [0.15, 0.14] for deep blue device; 15.7cd/A, [0.15, 0.30] for blue device; 12.6cd/A, [0.26, 0.62] for green device; 7.8cd/A, [0.49, 0.50] for yellow device and 7.7cd/A, [0.61, 0.39] for reddish‐orange device. Using Alq 3 and DPSF as co‐host to optimize the reddish orange device, the CIE coordinate [0.65, 0.35] of saturated red and 4.9cd/A of current efficiency are relatively obtained at 20mA/cm 2 . The studies of HOMO/LUMO energy levels, fluorescent exciting energy transfer from DPSF to all guests (PL & UV) and mobility of materials interpret DPSF extensively used as emitting host in full‐wavelength for organic light‐emitting devices (OLEDs).

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