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.

White light emission from a two-component hybrid gel via an energy transfer process

2015 ◽  
Vol 17 (48) ◽  
pp. 32297-32303 ◽  
Author(s):  
Xinhua Cao ◽  
Haichuang Lan ◽  
Zhenhua Li ◽  
Yueyuan Mao ◽  
Liming Chen ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Transfer Process ◽  
White Light ◽  
Light Emission ◽  
Light Harvesting ◽  
Energy Transfer Process ◽  
White Light Emission ◽  
Light Emitting ◽  
Hybrid Gel ◽  
Two Component

A two-component light-harvesting organogel containing a naphthalimide-based gelator as a donor and a phosphorescent Ir(iii) complex as an acceptor was used to produce white-light-emitting organogels.

Utilizing an effective framework to dye energy transfer in a carbazole-based metal–organic framework for high performance white light emission tuning

2018 ◽  
Vol 5 (11) ◽  
pp. 2868-2874 ◽  
Author(s):  
Yu-Pei Xia ◽  
Chen-Xue Wang ◽  
Lian-Cai An ◽  
Da-Shuai Zhang ◽  
Tong-Liang Hu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
High Performance ◽  
Light Emission ◽  
Metal Organic Framework ◽  
White Light Emission ◽  
Transfer Mechanism ◽  
Energy Transfer Mechanism ◽  
Light Emitting ◽  
Metal Organic

By introducing dyes into a MOF, a white-light-emitting luminophor was obtained based on effective framework to dye energy transfer mechanism.

Tunable luminescence from Sm3+, Ce3+ codoped Al2O3–La2O3–SiO2 glasses for white light emission

2009 ◽  
Vol 24 (5) ◽  
pp. 1730-1734 ◽  
Author(s):  
Hucheng Yang ◽  
G. Lakshminarayana ◽  
Yu Teng ◽  
Shifeng Zhou ◽  
Jianrong Qiu
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Spectral Properties ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Fluorescence Decay ◽  
White Light Emission ◽  
Luminescence Properties ◽  
Light Emitting ◽  
Luminescence Efficiency

Sm3+, Ce3+ codoped Al2O3–La2O3–SiO2 glasses were prepared and their luminescence properties were characterized. Blue-cyan to orange-red tunable luminescence was observed from these glasses with different excitation wavelengths ranging from 385 to 410 nm. White light emission with internal luminescence efficiency 42% has been observed using commercially available purple light-emitting-diode excitation. The energy transfer between Ce3+ and Sm3+ has also been investigated from fluorescence decay curves and spectral properties.

scholarly journals Luminescent properties of benzothiazole derivatives and their application in white light emission

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 4196-4202 ◽  
Author(s):  
Fengxian Lu ◽  
Rui Hu ◽  
Shuangqing Wang ◽  
Xudong Guo ◽  
Guoqiang Yang
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Light Emission ◽  
Luminescent Properties ◽  
Simple Approach ◽  
White Light Emission ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Benzothiazole Derivatives ◽  
Pmma Matrix

A saturated white-light emission was obtained by dispersing three benzothiazole analogues into a solid PMMA matrix. This skillfully avoids the detrimental energy transfer between doped dyes providing a simple approach for fabrication of white-light emitting devices.

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.

scholarly journals Energy transfer-mediated white light emission from Nile red-doped 9,10-diphenylanthracene nanoaggregates upon excitation with near UV light

2019 ◽  
Vol 18 (11) ◽  
pp. 2748-2758 ◽  
Author(s):  
Biswajit Manna ◽  
Amitabha Nandi ◽  
Rajib Ghosh
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Light Emission ◽  
Uv Light ◽  
Nile Red ◽  
Blue Emission ◽  
Green Emission ◽  
White Light Emission ◽  
Bright White Light ◽  
Red Lead

The excitonic blue emission, excimeric green emission and energy transfer-mediated red emission of Nile red lead to bright white light emission upon the photoexcitation of Nile red-doped DPA nanoaggregates.

Temperature dependence of energy transfer in tunable white light-emitting phosphor BaY2Si3O10:Bi3+,Eu3+ for near UV LEDs

2015 ◽  
Vol 3 (42) ◽  
pp. 11151-11162 ◽  
Author(s):  
Hongpeng Zhou ◽  
Qingping Wang ◽  
Ye Jin
Keyword(s):  
Energy Transfer ◽  
Temperature Dependence ◽  
White Light ◽  
Light Emission ◽  
Uv Light ◽  
Energy Transfer Efficiency ◽  
White Light Emission ◽  
Transfer Efficiency ◽  
Light Emitting ◽  
Uv Leds

The white light emission of BaY2Si3O10:0.01 Bi3+, mEu3+ phosphor can be realized and utilizing the energy transfer under near UV light pumped. The energy transfer efficiency between Bi(i) and Bi(ii) change with the temperature increasing due to phonon-assisted process. It is rare in the experiment on directly proof with the phonon-assisted energy transfer.

WHITE-ELECTROLUMINESCENCE DEVICE BASED ON POLYMER/QUANTUM DOT NANOCOMPOSITES

2005 ◽  
Vol 14 (04) ◽  
pp. 481-486 ◽  
Author(s):  
JONG HYEOK PARK ◽  
O OK PARK ◽  
JAI KYEONG KIM ◽  
JAE-WOONG YU ◽  
JUNG YONG KIM ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Excitation Energy Transfer ◽  
Blue Emission ◽  
Blend Ratio ◽  
Light Emitting ◽  
Hybrid Device ◽  
Electroluminescence Device ◽  
White Electroluminescence

White light emission was obtained from a light-emitting diode prepared from polymer/quantum dot nanocomposites consisting of poly(9,9′-dihexylfluorene-2,7-divinylene-m-phenylenevinylene-stat-p-phenylenevinylene) (PDHFPPV) and CdSe nanoparticles. Blue emission from PDHFPPV and red emission from the nanoparticles, which is triggered by partial excitation energy transfer from PDHFPPV, jointly contribute to white emission of the organic/inorganic hybrid device. Also, the blue-emitting matrix polymer makes the device preparation process simpler due to its high processability. By controlling the blend ratio, we could obtain a pure white color from the hybrid device.

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