Impedance Spectroscopy and Evolution of the Equivalent Electrical Circuit Model for Large Area Organic Light Emitting Diodes Aged Under Stress

2018 ◽  
Author(s):  
Alaa Alchaddoud ◽  
Ghassan Ibrahem ◽  
Laurent Canale ◽  
Georges Zissis
Keyword(s):  
Impedance Spectroscopy ◽  
Light Emitting Diodes ◽  
Electrical Circuit ◽  
Organic Light Emitting Diodes ◽  
Equivalent Electrical Circuit ◽  
Large Area ◽  
Light Emitting ◽  
Organic Light ◽  
Electrical Circuit Model ◽  
Equivalent Electrical Circuit Model

Passive cooling of large-area organic light-emitting diodes

2013 ◽  
Vol 14 (8) ◽  
pp. 1939-1945 ◽  
Author(s):  
Philipp Schwamb ◽  
Thilo C.G. Reusch ◽  
Christoph J. Brabec
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Passive Cooling ◽  
Large Area ◽  
Light Emitting ◽  
Organic Light

Surface Cleaning Challenges for Organic Light Emitting Diodes

2021 ◽  
Vol 314 ◽  
pp. 3-8
Author(s):  
Noel Giebink
Keyword(s):  
Light Emitting Diodes ◽  
Surface Cleaning ◽  
Organic Light Emitting Diodes ◽  
Large Area ◽  
Light Emitting ◽  
Organic Light ◽  
Organic Optoelectronic Devices ◽  
Soft Thin Film ◽  
Organic Optoelectronic

Organic optoelectronic devices such as light-emitting diodes and solar cells present unique challenges for surface cleaning and preparation because of their large area and the ‘soft’, thin film nature of the materials involved. This paper gives an introduction to this class of semiconductor devices and covers a recent example of how surface cleaning impacts the long-term reliability of organic light-emitting diodes being commercialized for solid-state lighting.

Large area organic light emitting diodes with multilayered graphene anodes

2012 ◽  
Author(s):  
Jaehyun Moon ◽  
Joohyun Hwang ◽  
Hong Kyw Choi ◽  
Taek Yong Kim ◽  
Sung-Yool Choi ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Large Area ◽  
Light Emitting ◽  
Organic Light

A novel intermediate connector with improved charge generation and separation for large-area tandem white organic lighting devices

2014 ◽  
Vol 2 (48) ◽  
pp. 10403-10408 ◽  
Author(s):  
Lei Ding ◽  
Yan-Qiu Sun ◽  
Hua Chen ◽  
Feng-Shuo Zu ◽  
Zhao-Kui Wang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Large Area ◽  
Charge Generation ◽  
Light Emitting ◽  
Organic Light

An intermediate connector is developed for fabricating tandem white organic light-emitting diodes.

Degradation of Bilayer Organic Light-Emitting Diodes Studied by Impedance Spectroscopy

2016 ◽  
Vol 16 (4) ◽  
pp. 3368-3372 ◽  
Author(s):  
Shuri Sato ◽  
Masashi Takata ◽  
Makoto Takada ◽  
Hiroyoshi Naito
Keyword(s):  
Impedance Spectroscopy ◽  
Light Emitting Diodes ◽  
Device Simulation ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Hole Transport Layer ◽  
Light Emitting ◽  
Organic Light

The degradation of bilayer organic light-emitting diodes (OLEDs) with a device structure of N, N′-di(1-naphthyl)-N, N′-diphenylbenzidine (α-NPD) (hole transport layer) and tris-(8-hydroxyquinolate)aluminum (Alq3) (emissive layer and electron transport layer) has been studied by impedance spectroscopy and device simulation. Two modulus peaks are found in the modulus spectra of the OLEDs below the electroluminescence threshold. After aging of the OLEDs, the intensity of electroluminescence is degraded and the modulus peak due to the Alq3 layer is shifted to lower frequency, indicating that the resistance of the Alq3 layer is increased. Device simulation reveals that the increase in the resistance of the Alq3 layer is due to the decrease in the electron mobility in the Alq3 layer.

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