Capacitance-voltage characteristics of organic light-emitting diodes varying the cathode metal: Implications for interfacial states

2007 ◽  
Vol 75 (8) ◽  
Author(s):  
Germà Garcia-Belmonte ◽  
Henk J. Bolink ◽  
Juan Bisquert
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Capacitance Voltage ◽  
Interfacial States ◽  
Cathode Metal

scholarly journals Optical Capacitance/Conductance-Voltage Characteristics of Stored Charges in Organic Light-Emitting Diodes

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2818
Author(s):  
Chengwen Zhang ◽  
Zheng Xu ◽  
Peng Wang ◽  
Zilun Qin ◽  
S. Wageh ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Dynamic Mechanism ◽  
Organic Light Emitting Diodes ◽  
Great Decrease ◽  
Light Emitting ◽  
Organic Light ◽  
Voltage Curve ◽  
Capacitance Voltage ◽  
Two Peaks

In this paper, capacitance/conductance-voltage characteristics (C/G-V) under illumination was achieved to investigate the dynamic mechanism of stored charges in OLEDs with a structure of ITO/ PEDOT:PSS/PMMA/Alq3/Al. For all devices, at least two peaks presented in the optical capacitance-voltage curve. Compared to curves of devices under dark, the first peak increased remarkably with a deviation to Vbi, which can be explained in the form of stored charges combined with the optical conductance characteristics. It was also found that a great decrease in capacitance is followed by the collapse of the first peak with PMMA thickness increased. It can account for the presence of interfacial charges, which is proved further by the conductance curves. To the device with 10 nm PMMA, a third peak took place in optical capacitance and it was due to the storage of electrons by PMMA. Also, the first capacitance peak enhanced approximate linearly as the illumination power increased, which can verify the contribution of the stored charges. Additionally, it shows the potential for the stored charges in optical detections.

68.1: Capacitance-Voltage Characteristics of Top Emitting Organic Light Emitting Diodes for Mobile Display Application

2011 ◽  
Vol 42 (1) ◽  
pp. 1002-1005 ◽  
Author(s):  
Jaewon Lee ◽  
Kang-Ju Lee ◽  
Min-ki Kim ◽  
Jong-sung Kim ◽  
Choong-keun Yoo ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Capacitance Voltage

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
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