In-situ generation of silver nanoparticle embedded hole transport layer as an internal light extraction layer for solution processed organic light emitting diodes

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.

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Study of nanostructured polymeric composites used for organic light emitting diodes and organic solar cells

World Journal of Engineering ◽

10.1260/1708-5284.9.5.399 ◽

2012 ◽

Vol 9 (5) ◽

pp. 399-406

Author(s):

Do Chung ◽

Nguyen Dinh ◽

Tran Thao ◽

Nguyen Nam ◽

Tran Trung ◽

...

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 TiO2 nanoparticles were prepared, respectively for the hole transport layer (HTL) and emission layer (EL) in Organic Light Emitting Diodes (OLED). The composite of MEH-PPV + nc-TiO2 was used for Organic Solar Cells (OCS). The results from the characterization of the properties of the nanocomposites and devices showed that electrical (I-V characteristics) and spectroscopic (photoluminescent) properties of the conjugate polymers were enhanced due to the incorporation of nc-TiO2 in the polymers. The OLEDs made from the nanocomposite films would exhibit a larger photonic efficiency and a longer lasting life. For the OSC made from MEH-PPV + nc-TiO2 composite, the fill factor (FF) reached a value as high as 0.34. Under illumination of light with a power density of 50 mW/cm2, the photoelectrical conversion efficiency (PEC) was found to be of 0.15% corresponding to an open circuit voltage VOC = 1.15 V and a short-cut circuit current density JSC = 0.125 mA/cm2.

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The Study of Hole Injection in OLEDs with Ultra-Thin Sol-Gel TiO2 Layer

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.189-193.42 ◽

2011 ◽

Vol 189-193 ◽

pp. 42-46

Author(s):

You Wang Hu ◽

Xiao Yan Sun ◽

Jian Duan

Keyword(s):

Sol Gel ◽

Hole Transport ◽

Organic Light Emitting Diodes ◽

Transport Layer ◽

Hole Injection ◽

Hole Transport Layer ◽

Carrier Injection ◽

Light Emitting ◽

Organic Light ◽

Pre Treatment

Organic light-emitting diodes (OLEDs) with inserting an ultrathin sol–gel titanium oxide (TiO2) buffer layer between the ITO anode and hole transport layer (HTL) were fabricated. The carrier injection and the device efficiency were affected by surface morphology of TiO2, which was changed by different plasma pre-treatment of ITO. Treated by CF4 plasma, the TiO2 layer is the smoothest, and treated by H2 plasma it is like island. The TiO2 layer like island is favor of carrier injection from the anode, which was attributed to the point discharged.

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Simulation and Optimization of C60-Based Organic Light-Emitting Diodes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1026.142 ◽

2021 ◽

Vol 1026 ◽

pp. 142-146

Author(s):

Shuo Wang

Keyword(s):

Indium Tin Oxide ◽

Light Emitting Diodes ◽

Hole Transport ◽

Organic Light Emitting Diodes ◽

Transport Layer ◽

Hole Transport Layer ◽

Optical Parameters ◽

Light Emitting ◽

Simulation And Optimization ◽

Organic Light

In this work we present a detailed analysis of the current-voltage variance from tris(8-hydroxyquinoline)aluminum (Alq3) based organic light emitting diodes using general-purpose photovoltaic device model (GPVDM) software as a function of: the choice of C60, the thickness of emission layer and hole-transport layer. The electrical and optical parameters of all layers were extracted from the material directory available in GPVDM. The calculations fully consider dispersion in glass substrate, indium tin oxide anode, the organic layers as well as the dispersion in the metal cathode. As expected, applied voltage was strongly dependent on the thickness of the function layer inside the devices. Finally, guidelines for designing devices with optimum turn-on voltage and thickness are presented.

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