RGB Emission through Controlled Donor Self-Assembly and Modulation of Excitation Energy Transfer: A Novel Strategy to White-Light-Emitting Organogels

2009 ◽  
Vol 21 (20) ◽  
pp. 2059-2063 ◽  
Author(s):  
Chakkooth Vijayakumar ◽  
Vakayil K. Praveen ◽  
Ayyappanpillai Ajayaghosh
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
White Light ◽  
Self Assembly ◽  
Excitation Energy Transfer ◽  
Light Emitting ◽  
Novel Strategy

The Application of Poly(Phenylene) Type Polymers and Oligomers in Electroluminescent Color Displays

1997 ◽  
Vol 471 ◽  
Author(s):  
S. Tasch ◽  
C. Brandstätter ◽  
W. Graupner ◽  
S. Hampel ◽  
C. Hochfilzer ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
White Light ◽  
Light Emission ◽  
Excitation Energy Transfer ◽  
Blue Emission ◽  
Environmental Stability ◽  
Large Area ◽  
Light Emitting ◽  
Color Conversion

ABSTRACTDue to their high photoluminescence efficiency (>30%), high environmental stability and the good charge transport properties the derivatives of poly(paraphenylene) (PPP), as the laddertype PPP (LPPP) and the oligomer hexaphenyl, are very suitable materials to realise efficient, stable, large area blue organic light-emitting diodes (OLEDs). The emission of blue OLEDs can be efficiently converted into all other emission colors either by an external color conversion technique (ECCT) or an internal color conversion technique (ICCT) and hence are very interesting for a number of display applications:Firstly, we demonstrate the realisation of efficient red-green-blue (RGB) emission colors (representing the RGB-pixels in a multicolor display) by an external CCT. In this case the blue EL device is covered with highly fluorescenct dye/matrix layers, which are excited by the blue emission and emit photoluminescence light in a lower energetic range.Secondly, a new method for producing efficient white light-emitting polymer diodes (which are interesting for e.g. backlight sources in liquid crystal displays) based on a blend of two polymers is presented: a blue light-emitting m-LPPP and a red-orange emitter poly(perylene-co-diethynylbenzene) (PPDB). The red-orange emission is created within the EL device (ICCT) by an excitation energy transfer from m-LPPP into the energetically lower lying states of PPDB. This internal excitation energy transfer is very efficient, so that only a concentration of 0.05 weight % PPDB in the polymer blend is required in order to obtain white light emission.

Excitation energy transfer in segmented ladder-type poly (para-phenylene) blue light emitting diodes

1995 ◽  
Vol 96 (3) ◽  
pp. 167-170 ◽  
Author(s):  
C. Paar ◽  
J. Stampfl ◽  
S. Tasch ◽  
H. Kreimaier ◽  
G. Leising ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Excitation Energy Transfer ◽  
Light Emitting

Dynamics of Polarons in Guest-Host-System Polymer Light Emitting Devices

1997 ◽  
Vol 488 ◽  
Author(s):  
E.J.W. List ◽  
J. Partee ◽  
W. Graupner ◽  
J. Shinar ◽  
G. Leising
Keyword(s):  
Energy Transfer ◽  
Magnetic Resonance ◽  
Excitation Energy ◽  
Active Layer ◽  
Excitation Energy Transfer ◽  
Light Emitting ◽  
Host System ◽  
Light Emitting Devices ◽  
Polymer Light Emitting Devices

AbstractThe conjugated ladder-type poly(paraphenylene) is an attractive material for blue polymer light emitting devices (PLED). Blending the active layer with small amounts of a red emitting guest polymer, the emission shifts from blue to red with increasing guest concentration due to efficient excitation energy transfer. The results of photoluminescence detected magnetic resonance, electroluminescence detected magnetic resonance measurements and current detected magnetic resonance measurements on PLEDs based on 0.05w%/o - 2w%/o red emitting poly(perylene-co-diethynylbenzene) (PPDB) in the active layer of the PLED are presented and discussed.

Excitation energy transfer and spatial exciton confinement in polyfluorene blends for application in light-emitting diodes

2002 ◽  
Vol 12 (12) ◽  
pp. 3523-3527 ◽  
Author(s):  
Ana Charas ◽  
Jorge Morgado ◽  
J. M. G. Martinho ◽  
A. Fedorov ◽  
Luis Alcácer ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Light Emitting Diodes ◽  
Excitation Energy Transfer ◽  
Light Emitting

Ultrafast Excitation Energy Transfer in a Blend of Light-Emitting Conjugated Polymers

1999 ◽  
Vol 101 (1-3) ◽  
pp. 306-307 ◽  
Author(s):  
G. Cerullo ◽  
W. Graupner ◽  
G. Lanzani ◽  
M. Nisoli ◽  
E.J.W. List ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Conjugated Polymers ◽  
Excitation Energy Transfer ◽  
Light Emitting

Efficient red- and orange-light-emitting diodes realized by excitation energy transfer from blue-light-emitting conjugated polymers

1997 ◽  
Vol 56 (8) ◽  
pp. 4479-4483 ◽  
Author(s):  
S. Tasch ◽  
E. J. W. List ◽  
C. Hochfilzer ◽  
G. Leising ◽  
P. Schlichting ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Conjugated Polymers ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Excitation Energy Transfer ◽  
Light Emitting

Efficient color tuning (blue, red-orange, white) of light emitting diodes by excitation energy transfer

1998 ◽  
Vol 9 (1-4) ◽  
pp. 183-187 ◽  
Author(s):  
E.J.W. List ◽  
S. Tasch ◽  
C. Hochfilzer ◽  
G. Leising ◽  
P. Schlichting ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Light Emitting Diodes ◽  
Excitation Energy Transfer ◽  
Color Tuning ◽  
Light Emitting
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