Morphological and electro-optical characterization of an ultrasonic spray coated electron injection and transport layer for organic light emitting diodes

2021 ◽  
Author(s):  
Wim Deferme ◽  
Rachith S. N. Kumar ◽  
Inge Verboven ◽  
Melissa Van Landeghem ◽  
Hilde Pellaers ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Electron Injection ◽  
Optical Characterization ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Light Emitting ◽  
Ultrasonic Spray ◽  
Organic Light

Optical characterization of organic light-emitting diodes with selective red emission

2021 ◽  
Author(s):  
M. Gioti ◽  
D. Tselekidou ◽  
L. Panagiotidis ◽  
V. Kyriazopoulos ◽  
K. Simitzi ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Optical Characterization ◽  
Organic Light Emitting Diodes ◽  
Red Emission ◽  
Light Emitting ◽  
Organic Light

Synthesis and Characterization of a Novel Diphenylamine-Thiophene Compound for Blue Organic Light-Emitting Diodes

2014 ◽  
Vol 893 ◽  
pp. 747-750
Author(s):  
Jing Tong Li ◽  
Ran Sheng Liu ◽  
Zeng Dian Zhao ◽  
Ru Jun Yu
Keyword(s):  
Light Emitting Diodes ◽  
Optical Characterization ◽  
Organic Light Emitting Diodes ◽  
Quantum Yields ◽  
Coupling Reactions ◽  
Small Molecular Weight ◽  
Excitation Peak ◽  
Light Emitting ◽  
Organic Light

Diphenylamine and thiophene compounds are promising materials for organic light-emitting diodes (OLEDs). We report here, the synthesis and optical property of a novel small molecular weight derivative,N4.N4,N4'.N4'-tetrakis (4- (thiophen-2-yl) phenyl)-[1,1'-bipheny-4,4'-diamine (TPPA). The target molecule was synthesized using 4,4'-dibromobiphenyl as the starting material, and the proceeding reactions included bromination, Buchwald and Suzuki coupling reactions. According to the optical characterization of it, the absorption peak and excitation peak is at 351nm and 412 nm, respectively. The luminescence quantum yields (LQY) of TPPA is measured at 61.3%.

Optical characterization of polychromatic organic light emitting diodes

2005 ◽  
Vol 97 (4) ◽  
pp. 043103 ◽  
Author(s):  
David Troadec ◽  
André Moliton ◽  
Bernard Ratier ◽  
Rémy Antony ◽  
Roger C. Hiorns
Keyword(s):  
Light Emitting Diodes ◽  
Optical Characterization ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

Fabrication and Characterization of Blue Organic Light-emitting Diodes

2011 ◽  
Author(s):  
Merric Srour ◽  
Richard Fu ◽  
Steven Blomquist ◽  
Jianmin Shi ◽  
Eric Forsythe ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Fabrication And Characterization

scholarly journals Unravelling the electron injection/transport mechanism in organic light-emitting diodes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tsubasa Sasaki ◽  
Munehiro Hasegawa ◽  
Kaito Inagaki ◽  
Hirokazu Ito ◽  
Kazuma Suzuki ◽  
...  
Keyword(s):  
Work Function ◽  
Transport Mechanism ◽  
Light Emitting Diodes ◽  
Light Emitting Diode ◽  
Electron Injection ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Materials Used

AbstractAlthough significant progress has been made in the development of light-emitting materials for organic light-emitting diodes along with the elucidation of emission mechanisms, the electron injection/transport mechanism remains unclear, and the materials used for electron injection/transport have been basically unchanged for more than 20 years. Here, we unravelled the electron injection/transport mechanism by tuning the work function near the cathode to about 2.0 eV using a superbase. This extremely low-work function cathode allows direct electron injection into various materials, and it was found that organic materials can transport electrons independently of their molecular structure. On the basis of these findings, we have realised a simply structured blue organic light-emitting diode with an operational lifetime of more than 1,000,000 hours. Unravelling the electron injection/transport mechanism, as reported in this paper, not only greatly increases the choice of materials to be used for devices, but also allows simple device structures.

scholarly journals Study of Nanostructured Polymeric Composites Used for Organic Light Emitting Diodes and Organic Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Nguyen Nang Dinh ◽  
Do Ngoc Chung ◽  
Tran Thi Thao ◽  
David Hui
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Nanocomposite Films ◽  
Hole Transport Layer ◽  
Light Emitting ◽  
Organic Light

Polymeric nanocomposite films from PEDOT and MEH-PPV embedded with surface modified TiO2nanoparticles for the hole transport layer and emission layer were prepared, respectively, for organic emitting diodes (OLEDs). The composite of MEH-PPV+nc-TiO2was used for organic solar cells (OSCs). The characterization of these nanocomposites and devices showed that electrical (I-Vcharacteristics) and spectroscopic (photoluminescent) properties of conjugate polymers were enhanced by the incorporation of nc-TiO2in the polymers. The organic light emitting diodes made from the nanocomposite films would exhibit a larger photonic efficiency and a longer lasting life. For the organic solar cells made from MEH-PPV+nc-TiO2composite, a fill factor reached a value of about 0.34. Under illumination by light with a power density of 50 mW/cm2, the photoelectrical conversion efficiency was about 0.15% corresponding to an open circuit voltageVoc= 0.126 V and a shortcut circuit current densityJsc= 1.18 mA/cm2.

Electrical characterization of organic light-emitting diodes using dipotassium phthalate as n-type dopant

2008 ◽  
Vol 93 (8) ◽  
pp. 083505 ◽  
Author(s):  
Meng-Huan Ho ◽  
Ming-Ta Hsieh ◽  
Teng-Ming Chen ◽  
Jenn-Fang Chen ◽  
Shiao-Wen Hwang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Electrical Characterization ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light
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