Measuring the light emission profile in organic light-emitting diodes with nanometre spatial resolution

2010 ◽  
Vol 4 (5) ◽  
pp. 329-335 ◽  
Author(s):  
S. L. M. van Mensfoort ◽  
M. Carvelli ◽  
M. Megens ◽  
D. Wehenkel ◽  
M. Bartyzel ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Light Emitting Diodes ◽  
Light Emission ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Emission Profile ◽  
Organic Light

scholarly journals Light-Emission and Electricity-Generation Properties of Photovoltaic Organic Light-Emitting Diodes with Rubrene/DBP Light-Emission and Electron-Donating Layers

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Mun Soo Choi ◽  
Ho-Nyeon Lee
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Fill Factor ◽  
Light Emitting Diodes ◽  
Light Emission ◽  
Power Conversion ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Emission Efficiency ◽  
Organic Light

We report the dependence of the characteristics of photovoltaic organic light-emitting diodes (PVOLEDs) on the composition of the light-emission and electron-donating layer (EL-EDL). 5,6,11,12-Tetraphenylnaphthacene (rubrene): dibenzo{[f,f′]-4,4′,7,7′-tetraphenyl}diindeno[1,2,3-cd:1′,2′,3′-lm]perylene (DBP) was used to form the EL-EDL, and C60was used as an electron-accepting layer (EAL) material. A half-gap junction was formed at the EAL/EL-EDL interface. As the rubrene ratio in the EL-EDL increased, the emission spectra became blue-shifted and the light-emission efficiency increased. The highest emission efficiency was achieved with an EL-EDL composed of 95% rubrene and 5% DBP. The short-circuit current decreased as the rubrene content increased up to 50% and then saturated, while the open-circuit voltage was almost unchanged regardless of the rubrene content. The power-conversion efficiency and fill factor increased as the composition of the EL-EDL approached that of pure materials. By controlling the rubrene : DBP ratio, the emission color could be adjusted. The emission efficiency of devices with mixed rubrene/DBP EL-EDLs could be greater than that of either pure rubrene or pure DBP devices. We obtained an overall power-conversion efficiency of 3% and a fill factor greater than 50%.

scholarly journals Organic Light Emitting Diodes for White Light Emission

10.5772/9892 ◽  
2010 ◽  
Author(s):  
Ritu Srivastava ◽  
M.N. Kamalasanan ◽  
Gayatri Chauhan ◽  
Arunandan Kumar ◽  
Priyanka Tyagi ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Light Emission ◽  
White Light Emission ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light
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