scholarly journals Electroluminescence: From White to Red: Electric-Field Dependent Chromaticity of Light-Emitting Electrochemical Cells based on Archetypal Porphyrins (Adv. Funct. Mater. 37/2016)

2016 ◽  
Vol 26 (37) ◽  
pp. 6736-6736 ◽  
Author(s):  
Michael D. Weber ◽  
Judith E. Wittmann ◽  
Alexandra Burger ◽  
Osman Barış Malcıoğlu ◽  
Javier Segarra-Martí ◽  
...  
Keyword(s):  
Electric Field ◽  
Electrochemical Cells ◽  
Light Emitting ◽  
Field Dependent

From White to Red: Electric-Field Dependent Chromaticity of Light-Emitting Electrochemical Cells based on Archetypal Porphyrins

2016 ◽  
Vol 26 (37) ◽  
pp. 6737-6750 ◽  
Author(s):  
Michael D. Weber ◽  
Judith E. Wittmann ◽  
Alexandra Burger ◽  
Osman Barış Malcıoğlu ◽  
Javier Segarra-Martí ◽  
...  
Keyword(s):  
Electric Field ◽  
Electrochemical Cells ◽  
Light Emitting ◽  
Field Dependent

Bright, stable, and efficient red light-emitting electrochemical cells using contorted nanographenes

2020 ◽  
Vol 5 (3) ◽  
pp. 473-480 ◽  
Author(s):  
Elisa Fresta ◽  
Kevin Baumgärtner ◽  
Juan Cabanillas-Gonzalez ◽  
Michael Mastalerz ◽  
Rubén D. Costa
Keyword(s):  
Electric Field ◽  
Red Light ◽  
Electrochemical Cells ◽  
Light Emitting ◽  
Field Dependent

A red-emitting contorted hexabenzoovalene yielded bright and stable light-emitting electrochemical cells showing electric-field dependent emission.

scholarly journals Suppression of Electric Field-Induced Segregation in Sky-Blue Perovskite Light-Emitting Electrochemical Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1937
Author(s):  
Tatiana G. Liashenko ◽  
Anatoly P. Pushkarev ◽  
Arnas Naujokaitis ◽  
Vidas Pakštas ◽  
Marius Franckevičius ◽  
...  
Keyword(s):  
Electric Field ◽  
Band Gap ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Film Deposition ◽  
Infrared Light ◽  
Electrochemical Cells ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Turn On

Inexpensive perovskite light-emitting devices fabricated by a simple wet chemical approach have recently demonstrated very prospective characteristics such as narrowband emission, low turn-on bias, high brightness, and high external quantum efficiency of electroluminescence, and have presented a good alternative to well-established technology of epitaxially grown III-V semiconducting alloys. Engineering of highly efficient perovskite light-emitting devices emitting green, red, and near-infrared light has been demonstrated in numerous reports and has faced no major fundamental limitations. On the contrary, the devices emitting blue light, in particular, based on 3D mixed-halide perovskites, suffer from electric field-induced phase separation (segregation). This crystal lattice defect-mediated phenomenon results in an undesirable color change of electroluminescence. Here we report a novel approach towards the suppression of the segregation in single-layer perovskite light-emitting electrochemical cells. Co-crystallization of direct band gap CsPb(Cl,Br)3 and indirect band gap Cs4Pb(Cl,Br)6 phases in the presence of poly(ethylene oxide) during a thin film deposition affords passivation of surface defect states and an increase in the density of photoexcited charge carriers in CsPb(Cl,Br)3 grains. Furthermore, the hexahalide phase prevents the dissociation of the emissive grains in the strong electric field during the device operation. Entirely resistant to 5.7 × 106 V·m−1 electric field-driven segregation light-emitting electrochemical cell exhibits stable emission at wavelength 479 nm with maximum external quantum efficiency 0.7%, maximum brightness 47 cd·m−2, and turn-on bias of 2.5 V.

Mapping the built-in electric field in polymer light-emitting electrochemical cells

2012 ◽  
Vol 13 (3) ◽  
pp. 361-365 ◽  
Author(s):  
Yufeng Hu ◽  
Bryce Dorin ◽  
Feng Teng ◽  
Jun Gao
Keyword(s):  
Electric Field ◽  
Electrochemical Cells ◽  
Light Emitting

Electric Field Distribution in Polymer Light-Emitting Electrochemical Cells

2000 ◽  
Vol 85 (2) ◽  
pp. 421-424 ◽  
Author(s):  
J. C. deMello ◽  
J. J. M. Halls ◽  
S. C. Graham ◽  
N. Tessler ◽  
R. H. Friend
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Electrochemical Cells ◽  
Light Emitting

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
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