Chin, Byung Doo Kim, Jai Kyeong Park, O. Ok 2024-01-21T00:34:07Z 2024-01-21T00:34:07Z 2021-09-02 2007-08-07 0022-3727 https://pubs.kist.re.kr/handle/201004/134202 In this work, we fabricated white organic light-emitting devices (WOLEDs) containing a layered light-emitting region composed of a single blue-emitting host and different fluorescent dopant materials. The effects of varying the dye-doping ratio and emitting layer thickness on the efficiency, lifetime, spectral voltage-dependence and white balance were investigated for devices with a blue/orange stacked layer structure. Addition of a blue host layer doped with a green-emitting dopant, to give a blue/green/orange emitter, resulted in a broadband white spectrum without the need for a charge-blocking interlayer. The composition of blue, green and orange dopants in the host and the thickness of each emitting layer were optimized, resulting in a device efficiency of 9-11 cd A(-1) even at a high brightness of 10 000 cd m(-2) (achieved at a bias voltage of less than 9V) with an emission spectrum suitable for lighting applications. English IOP PUBLISHING LTD LAYER DIODES HOLE Controlled light emission from white organic light-emitting devices with a single blue-emitting host and multiple fluorescent dopants Article 10.1088/0022-3727/40/15/008 1 JOURNAL OF PHYSICS D-APPLIED PHYSICS, v.40, no.15, pp.4436 - 4441 JOURNAL OF PHYSICS D-APPLIED PHYSICS 40 15 4436 4441 scie scopus 000248250600009 2-s2.0-34547466656 Physics, Applied Physics Article LAYER DIODES HOLE White OLED Fluorescent Multilayer