STI stress-induced increase in reverse bias junction capacitance

2002 ◽  
Vol 23 (6) ◽  
pp. 312-314 ◽  
Author(s):  
V.P. Gopinath ◽  
H. Puchner ◽  
M. Mirabedini
Keyword(s):  
Reverse Bias ◽  
Junction Capacitance

Evaluation of interface junction capacitance of perovskite solar cells by direct current measurement

2019 ◽  
Author(s):  
Satoshi Uchida ◽  
Ludmila Cojocaru ◽  
Hiromi Tobita ◽  
Viraji Jayaweera ◽  
Shoji Kaneko ◽  
...  
Keyword(s):  
Solar Cells ◽  
Direct Current ◽  
Perovskite Solar Cells ◽  
Current Measurement ◽  
Junction Capacitance ◽  
Direct Current Measurement

A New Prediction Model on the Luminance of OLEDs Subjected to Different Reverse Biases for Alleviating Degradation in AMOLED Displays

2014 ◽  
Author(s):  
Paul C.-P. Chao ◽  
Yen-Ping Hsu ◽  
Yung-Hua Kao ◽  
Kuei-Yu Lee
Keyword(s):  
Reverse Bias ◽  
High Efficiency ◽  
Life Time ◽  
Density Currents ◽  
High Brightness ◽  
Light Emitting ◽  
Wide Viewing Angle ◽  
Time Operation ◽  
Long Time ◽  
History Of

Organic light-emitting diodes (OLEDs) have drawn much attention in areas of displays and varied illumination devices due to multiple advantages, such as high brightness, high efficiency, wide viewing angle, and simple structure. However, the long-time degradation of OLED emission is a serious drawback. This degradation was investigated by past works, which pointed out that the degradation was induced by high-density currents through OLED component under the long-time operation [1][2]. Proposed by a past work [3], different reverse biases was imposed on OLED components in display frames to alleviate the long-time degradation on OLEDs. Most recently, along with the reverse bias, new pixel circuits [4][5] for AMOLED displays are designed to alleviate OLED degradation, thus successfully extending OLED life time. However, since emission luminances in different frame times during AMOLED displaying differs significantly for displaying varied images, the OLED degradation evolves in a highly unpredictable fashion. In this study, based on valid theories, the voltage across the OLED is first used as indicator for OLED degradation. Then the relation between the level of OLED degradation, in terms of OLED’s cross voltage, and the history of imposing reverse biases are precisely modeled. With the model, the degradation of the OLED under reverse bias to extend lifetime can be successfully predicted. Based on this model, engineers can then optimize the applied reverse bias on OLEDs to maximize the OLED lifetime for varied display requirement.

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