Barrier-Free Electron–Hole Capture in Polymer Blend Heterojunction Light-Emitting Diodes

2003 ◽  
Vol 15 (20) ◽  
pp. 1708-1712 ◽  
Author(s):  
A.C. Morteani ◽  
A.S. Dhoot ◽  
J.-S. Kim ◽  
C. Silva ◽  
N.C. Greenham ◽  
...  
Keyword(s):  
Polymer Blend ◽  
Free Electron ◽  
Light Emitting Diodes ◽  
Electron Hole ◽  
Light Emitting ◽  
Hole Capture ◽  
Barrier Free

Energy Landscape of Vertically Anisotropic Polymer Blend Films toward Highly Efficient Polymer Light-Emitting Diodes (PLEDs)

2018 ◽  
Vol 28 (8) ◽  
pp. 1705903 ◽  
Author(s):  
Muhammad Umair Hassan ◽  
Yee-Chen Liu ◽  
Ali K. Yetisen ◽  
Haider Butt ◽  
Richard Henry Friend
Keyword(s):  
Polymer Blend ◽  
Light Emitting Diodes ◽  
Energy Landscape ◽  
Light Emitting ◽  
Blend Films ◽  
Highly Efficient ◽  
Polymer Light Emitting Diodes

Optical Performance Characteristics of Light-Emitting Diodes Designed with Dip-Shaped InGaN/GaN Quantum well Structures

2013 ◽  
Vol 328 ◽  
pp. 845-849
Author(s):  
Seong Jun Kim ◽  
Chel Jong Choi ◽  
Hyun Soo Kim
Keyword(s):  
Quantum Well ◽  
Light Emitting Diodes ◽  
Internal Quantum Efficiency ◽  
Spatial Separation ◽  
Wave Functions ◽  
Radiative Recombination Rate ◽  
Electron Hole ◽  
Light Emitting ◽  
Quantum Well Structures ◽  
Lower Temperature

A dip-shaped InGaN/GaN quantum well (QW) structure was computed to design efficient light-emitting diodes (LEDs). The advanced LEDs designed with the dip-shaped QW structures exhibited higher internal quantum efficiency by 26 % and the lower temperature-driven efficiency droop as compared to the reference LEDs. This could be due to the enhanced radiative recombination rate in the QW active region, which is associated with the reduced spatial separation of electron-hole wave functions.

Electroluminescence Spectral Imaging in Polymer Blend Light Emitting Diodes

2005 ◽  
Vol 871 ◽  
Author(s):  
Noriyuki Takada ◽  
Kiyohiko Tsutsumi ◽  
Toshihide Kamata
Keyword(s):  
Polymer Blend ◽  
Light Emitting Diodes ◽  
Light Emitting Diode ◽  
Spectral Imaging ◽  
Two Dimensional ◽  
Light Emitting ◽  
Spectroscopy System

AbstractThe spectral imaging for electroluminescence (EL) characterization in the light emitting diode (LED) based on blends of poly[2,7-(9,9-di-n-octylfluorene)] (PFO) and poly[2,7-(9,9-di-n-octylfluorene)-alt-(1,4-phenylene-((4-sec-butylphenyl)amino)-1,4-phenylene) ] (TFB) was performed using the two dimensional imaging micro-spectroscopy system. We found that EL spectral images varied with increasing applied voltages. The origin for such variation of EL spectral images will be discussed in this report.

scholarly journals Charge trap assisted high efficiency in new polymer-blend based light emitting diodes

Nano Energy ◽  
2016 ◽  
Vol 21 ◽  
pp. 62-70 ◽  
Author(s):  
M.U. Hassan ◽  
Yee-Chen Liu ◽  
Kamran ul Hasan ◽  
H. Butt ◽  
Jui-Fen Chang ◽  
...  
Keyword(s):  
Polymer Blend ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Charge Trap
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