Enhanced light emission from one-layered organic light-emitting devices doped with organic salt by simultaneous thermal and electrical annealing

2006 ◽  
Vol 89 (10) ◽  
pp. 103507 ◽  
Author(s):  
Youn Chan Yim ◽  
Jin Ho Park ◽  
Sun Woong Kim ◽  
Eun Ha Choi ◽  
Guang Sup Cho ◽  
...  
Keyword(s):  
Light Emission ◽  
Organic Salt ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

A Novel Efficient Blue Organic Light Emitting Structure

2005 ◽  
Vol 475-479 ◽  
pp. 3677-3680 ◽  
Author(s):  
Wen Long Jiang ◽  
Yu Duan ◽  
Yi Zhao ◽  
Jingying Hou ◽  
Shi Yong Liu
Keyword(s):  
Light Emission ◽  
Copper Phthalocyanine ◽  
Luminous Efficiency ◽  
Blocking Layer ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Carrier Recombination ◽  
Organic Light ◽  
Hole Blocking Layer ◽  
Organic Light Emitting Devices

In this paper, we describe the performance of an organic light emitting devices〔OLEDs〕 with ITO /4,4’,4“-tris{N,- （ 3-methylphenyl ） -N-phenylamino}triphenylamine (m-MTDATA) /N,N-diphenyl-N,N-bis1-naphthyl-1,1-biphenyl-4,4-diamine (NPB) /copper phthalocyanine (CuPc) / NPB / Bathocuproine(BCP) / tris-8-hydroxyquinoline Aluminum (Alq3) / LiF/ AL structure, the CuPc inserted between the two layers of NPB as a hole-consuming layer (HCL), and the BCP as a hole-blocking layer (HBL) . The EL spectrum peak is at 430 nm, indicating that the carrier recombination is confined in the NPB layer, in additional light emission originates from NPB. Compared with the luminous efficiency of the conventional diode without CuPc layer, that of the diode with HCL has been sharply increased up to 2.62 cd /A. It suggested that the CuPc and BCP exactly function as hole-consuming and hole-blocking layers, respectively, which enhance the efficiency of carrier，s recombination and confine the excitation in the EL layer.

Cavity Design and Optimization of Hybrid Quantum Dot Organic Light Emitting Devices for Blue Light Emission

2020 ◽  
Vol 15 (11) ◽  
pp. 1364-1373
Author(s):  
Iman E. Shaaban ◽  
Ahmed S. Samra ◽  
Bedir Yousif ◽  
N. A. Alghamdi ◽  
Shamia El-Sherbiny ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Blue Light ◽  
Light Emission ◽  
Cdse Qds ◽  
Blue Light Emission ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

The present search handles the blue light emission investigation of hybrid quantum dots organic light-emitting devices. The emissions at 445 nm and 460 nm have been examined for microcavity hybrid quantum dot organic light-emitting devices (QD-OLED) upon quantum dots of CdS and CdSe. External light emissions have been evaluated through a numerical model based on the transfer matrix for electromagnetic plane waves. The devices' optical properties are investigated based on internal reflectance and cavity length by considering the architecture consisting of multilayers thin-film structures. The overall performance of the light-emitting devices with emission at 445 nm showed an improvement of the enhancement factor and narrowing outcoupling emission relative to the devices with emission at 460 nm. Besides, the light-emitting devices based on CdS QDs revealed better performance relative to the devices based on CdSe QDs.

Effects of substrate topography on current injection and light emission properties of organic light emitting devices

2014 ◽  
Vol 15 (12) ◽  
pp. 3529-3537 ◽  
Author(s):  
Yiying Zhao ◽  
Denis Nothern ◽  
Abhishek Yadav ◽  
Kwang-hyup An ◽  
Kevin P. Pipe ◽  
...  
Keyword(s):  
Light Emission ◽  
Current Injection ◽  
Light Emitting ◽  
Emission Properties ◽  
Light Emitting Devices ◽  
Substrate Topography ◽  
Organic Light ◽  
Organic Light Emitting Devices

Improve angular dependence of emission intensity in top-emitting organic light-emitting devices by using curved surfaces as substrates

2016 ◽  
Vol 30 (08) ◽  
pp. 1650094
Author(s):  
Yifan Zhang ◽  
Tong Yang ◽  
Xiali Ou ◽  
Qiang Gao
Keyword(s):  
Emission Intensity ◽  
Light Emission ◽  
Curved Surface ◽  
Curved Surfaces ◽  
Emission Pattern ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Emission Surface ◽  
Organic Light Emitting Devices

We have demonstrated an effective way to suppress the viewing angle dependence of the emission intensity of top-emitting organic light-emitting devices (TOLEDs) by fabricating devices on curved surfaces. From this approach, curved light emission surface has been obtained and TOLEDs with curved surface exhibit a relatively dispersed light emission pattern. As a result, the variation of emission intensity with viewing angles can be relieved. In addition, we can almost observe the same luminance and efficiency in OLEDs with and without curved surface light emission.

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