scholarly journals Electrochemical doping during light emission in polymer light-emitting electrochemical cells

2008 ◽  
Vol 78 (24) ◽  
Author(s):  
Nathaniel D. Robinson ◽  
Junfeng Fang ◽  
Piotr Matyba ◽  
Ludvig Edman
Keyword(s):  
Light Emission ◽  
Electrochemical Cells ◽  
Light Emitting ◽  
Electrochemical Doping

On the selection of a host compound for efficient host–guest light-emitting electrochemical cells

2015 ◽  
Vol 3 (31) ◽  
pp. 8114-8120 ◽  
Author(s):  
Shi Tang ◽  
Herwig A. Buchholz ◽  
Ludvig Edman
Keyword(s):  
Electrochemical Cells ◽  
Light Emitting ◽  
Electrochemical Doping ◽  
Host Compound ◽  
Selection Of

Reversible electrochemical doping capacity is a fundamental criterion for an efficient and functional host–guest LEC.

Polymer light-emitting electrochemical cells with ultralow salt content: performance enhancement through synergetic chemical and electrochemical doping actions

2021 ◽  
Author(s):  
Shiyu Hu ◽  
Hung-Wei Yeh ◽  
Jun Gao
Keyword(s):  
High Efficiency ◽  
Performance Enhancement ◽  
Salt Content ◽  
Electrochemical Cells ◽  
Light Emitting ◽  
Electrochemical Doping

Polymer light-emitting electrochemical cells (PLECs) employing silver trifluoromethanesulfonate (Ag triflate) salt are demonstrated. The red-emitting PLECs contained 0.2–1 wt% salt, but exhibited peak luminance of 6,000 cd/m2, with high efficiency...

scholarly journals Light-Emitting Textiles: Device Architectures, Working Principles, and Applications

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 652
Author(s):  
Marco Cinquino ◽  
Carmela Tania Prontera ◽  
Marco Pugliese ◽  
Roberto Giannuzzi ◽  
Daniela Taurino ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Light Emission ◽  
Light Therapy ◽  
Organic Leds ◽  
Electrochemical Cells ◽  
Electronic Components ◽  
Electroluminescent Devices ◽  
Light Emitting ◽  
Polymer Optical Fibers ◽  
Critical Aspects

E-textiles represent an emerging technology aiming toward the development of fabric with augmented functionalities, enabling the integration of displays, sensors, and other electronic components into textiles. Healthcare, protective clothing, fashion, and sports are a few examples application areas of e-textiles. Light-emitting textiles can have different applications: sensing, fashion, visual communication, light therapy, etc. Light emission can be integrated with textiles in different ways: fabricating light-emitting fibers and planar light-emitting textiles or employing side-emitting polymer optical fibers (POFs) coupled with light-emitting diodes (LEDs). Different kinds of technology have been investigated: alternating current electroluminescent devices (ACELs), inorganic and organic LEDs, and light-emitting electrochemical cells (LECs). The different device working principles and architectures are discussed in this review, highlighting the most relevant aspects and the possible approaches for their integration with textiles. Regarding POFs, the methodology to obtain side emissions and the critical aspects for their integration into textiles are discussed in this review. The main applications of light-emitting fabrics are illustrated, demonstrating that LEDs, alone or coupled with POFs, represent the most robust technology. On the other hand, OLEDs (Organic LEDs) are very promising for the future of light-emitting fabrics, but some issues still need to be addressed.

Single Molecule Solid State Light Emitting Electrochemical Cells with Lifetimes Superior to 3000 Hours

2008 ◽  
Author(s):  
Henk Bolink ◽  
Rubén D. Costa ◽  
Enrique Orti ◽  
Michele Sessolo ◽  
Stefan Graber ◽  
...  
Keyword(s):  
Solid State ◽  
Single Molecule ◽  
Electrochemical Cells ◽  
Light Emitting

A versatile structure of light-emitting electrochemical cells for printed electronics

2020 ◽  
Vol 13 (8) ◽  
pp. 084002
Author(s):  
Yuki Tanaka ◽  
Jiang Pu ◽  
Taishi Takenobu
Keyword(s):  
Printed Electronics ◽  
Electrochemical Cells ◽  
Light Emitting

scholarly journals Effect of Laser Irradiation on Emissivity of Flame-Generated Nanooxides

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2303
Author(s):  
Silvana De Iuliis ◽  
Roberto Dondè ◽  
Igor Altman
Keyword(s):  
Laser Irradiation ◽  
Light Emission ◽  
Energy Gap ◽  
Particle Temperature ◽  
Electron Excitation ◽  
Flame Spray ◽  
Energy Bands ◽  
Light Emitting ◽  
Spectral Behavior ◽  
The Difference

The application of pyrometry to retrieve particle temperature in particulate-generating flames strictly requires the knowledge of the spectral behavior of emissivity of light-emitting particles. Normally, this spectral behavior is considered time-independent. The current paper challenges this assumption and explains why the emissivity of oxide nanoparticles formed in flame can change with time. The suggested phenomenon is related to transitions of electrons between the valence and conduction energy bands in oxides that are wide-gap dielectrics. The emissivity change is particularly crucial for the interpretation of fast processes occurring during laser-induced experiments. In the present work, we compare the response of titania particles produced by a flame spray to the laser irradiation at two different excitation wavelengths. The difference in the temporal behavior of the corresponding light emission intensities is attributed to the different mechanisms of electron excitation during the laser pulse. Interband transitions that are possible only in the case of the laser photon energy exceeding the titania energy gap led to the increase of the electron density in the conduction band. Relaxation of those electrons back to the valence band is the origin of the observed emissivity drop after the UV laser irradiation.

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