Organic light emitting materials : amplified spontaneous emission and hybrid inorganic-organic white light emitters

2011 ◽  
Author(s):  
Zhounan Yue
Keyword(s):  
Spontaneous Emission ◽  
White Light ◽  
Amplified Spontaneous Emission ◽  
Light Emitters ◽  
Light Emitting ◽  
Organic Light

Optimization for white organic light-emitting diode based on DCJTB as color conversion layer

2018 ◽  
Vol 32 (27) ◽  
pp. 1850299
Author(s):  
Pei Wang ◽  
Zhen Wang ◽  
Ai Chen ◽  
Jia-Feng Xie ◽  
Xin Zheng
Keyword(s):  
Current Efficiency ◽  
Current Density ◽  
White Light ◽  
Power Efficiency ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
High Efficient ◽  
Color Conversion

In this paper, combining phosphorescence and fluorescence to form white light was realized based on DCJTB:PMMA/ITO/NPB/TCTA/FIrpic:TCTA/TPBi/Ir(ppy)3:TPBi/TPBi/Cs2CO3/Al. The effects of red fluorescence on this white light device was studied by adjusting the concentration of DCJTB. The study shows that the device with a DCJTB concentration of 0.7% in the color conversion layer (CCL) generates a peak current efficiency and power efficiency of 23.4 cd ⋅ A[Formula: see text] and 7.5 lm ⋅ W[Formula: see text], respectively. And it is closest to the equal-energy white point of (0.33, 0.33) which shows a CIE (Commission Internationale de L’Eclairage) coordinate of (0.35, 0.43) and a color rendering index (CRI) of 70 at current density of 10 mA ⋅ cm[Formula: see text]. In order to improve the efficiency, we design and fabricate both high efficient and pure white organic light-emitting diode (WOLED) by replacing the single blue emission layer (EML) with double EMLs of FIrpic:TCTA and FIrpic:TPBi. The further study shows that, when the layers of EML is three and the concentration of DCJTB at 0.7%, the device exhibits good performance specifically, at current density of 10 mA ⋅ cm[Formula: see text], the current efficiency of 28.2 cd ⋅ A[Formula: see text] (power efficiency of 10.3 lm ⋅ W[Formula: see text]), and the CIE coordinate of (0.33, 0.31) (CRI of 80.38).

Modification of Spontaneous Emission from Periodic Array of Spherical Polystyrene Particles Containing Fluorescent Molecules

1997 ◽  
Vol 488 ◽  
Author(s):  
T. Yamasaki ◽  
T. Tsutsui
Keyword(s):  
Spontaneous Emission ◽  
Organic Light Emitting Diodes ◽  
Dye Molecules ◽  
Ordered Structures ◽  
Light Emitting ◽  
Ordered Arrays ◽  
Dielectric Particles ◽  
Organic Light ◽  
Partial Suppression ◽  
Fluorescent Molecules

AbstractEmissive behavior of dye molecules embedded in the systems with the size of visible wavelength were studied. The structures consisted of close-packed arrays of spherical dielectric particles with diameter of submicrometer were fabricated. Photoluminescence from selfassembled arrays of dye-doped polystyrene microspheres were examined. In this systems, partial suppression of spontaneous emission by ordered structures were observed. Electricallypumped emission from organic light emitting diodes with highly ordered arrays of silica microspheres were attempted.

scholarly journals Broadened Bandwidth Amplified Spontaneous Emission from Blue GaN-Based Short-Cavity Superluminescent Light-Emitting Diodes

2020 ◽  
Vol 9 (1) ◽  
pp. 015019 ◽  
Author(s):  
Hezhi Zhang ◽  
Ching-Wen Shih ◽  
Denis Martin ◽  
Alexander Caut ◽  
Jean-François Carlin ◽  
...  
Keyword(s):  
Spontaneous Emission ◽  
Light Emitting Diodes ◽  
Amplified Spontaneous Emission ◽  
Light Emitting

scholarly journals Synthesis, optical properties, and amplified spontaneous emission of hybrid Ag–SiO2–CdTe nanocomposite

2017 ◽  
Vol 95 (10) ◽  
pp. 933-940
Author(s):  
A.M. Saad ◽  
M.B. Mohamed ◽  
I.M. Azzouz
Keyword(s):  
Spontaneous Emission ◽  
Amplified Spontaneous Emission ◽  
Silica Shell ◽  
Thermal Therapy ◽  
Threshold Power ◽  
Excitation Wavelength ◽  
Exciton Absorption ◽  
Light Emitting ◽  
Cdte Nanoparticles ◽  
And Control

In this work, a hybrid nanocomposite of metal–dielectric–semiconductor, Ag–SiO2–CdTe, nanoparticles has been synthesized. Silica shell was used as a spacer to isolate and control the distance between Ag plasmonic and luminescent CdTe QDs. It was found that insertion of silica shell enhances the plasmonic field more than 31%. Accordingly, Ag-SiO2 plasmonic enhances the luminescence and quantum yield of CdTe quantum dots by 200% and 55%, respectively. The threshold power of amplified spontaneous emission of CdTe was found to depend on both temperature and excitation wavelength location with respect to plasmon and exciton absorption. This nanocomposite could be potentially used in light-emitting diodes, biological sensing, and thermal therapy.

scholarly journals White light emission produced by CTMA-DNA nanolayers embedded with a mixture of organic light-emitting molecules

RSC Advances ◽  
2019 ◽  
Vol 9 (54) ◽  
pp. 31628-31635 ◽  
Author(s):  
Prathamesh Chopade ◽  
Sreekantha Reddy Dugasani ◽  
Sohee Jeon ◽  
Jun-Ho Jeong ◽  
Sung Ha Park
Keyword(s):  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Light Emitting ◽  
Organic Light

White light emission produced by organic light-emitting molecule-embedded CTMA-DNA nanolayers was demonstrated.

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