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.

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

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

Red-light-emitting electrochemical cells based on cationic iridium complexes with phenanthroimidazole-type ancillary ligand

2018 ◽  
Vol 54 ◽  
pp. 167-176 ◽  
Author(s):  
Jo Yeonah ◽  
Chozhidakath Damodharan Sunesh ◽  
Ramesh Kumar Chitumalla ◽  
Joonkyung Jang ◽  
Youngson Choe
Keyword(s):  
Red Light ◽  
Electrochemical Cells ◽  
Iridium Complexes ◽  
Ancillary Ligand ◽  
Light Emitting

scholarly journals Push-Pull Design of Bis(tridentate) Ruthenium(II) Polypyridine Chromophores as Deep Red Light Emitters in Light-Emitting Electrochemical Cells

2013 ◽  
Vol 2014 (2) ◽  
pp. 288-295 ◽  
Author(s):  
Aaron Breivogel ◽  
Myeongjin Park ◽  
Donggu Lee ◽  
Stefanie Klassen ◽  
Angelika Kühnle ◽  
...  
Keyword(s):  
Red Light ◽  
Electrochemical Cells ◽  
Light Emitters ◽  
Light Emitting

scholarly journals Red Light-Emitting Electrochemical Cells Employing Pyridazine-Bridged Cationic Diiridium Complexes

2019 ◽  
Vol 8 (6) ◽  
pp. R84-R87 ◽  
Author(s):  
Maria-Grazia La-Placa ◽  
Ana María Igual-Muñoz ◽  
Jorge Romero ◽  
Ruth E. Daniels ◽  
Valery N. Kozhevnikov ◽  
...  
Keyword(s):  
Red Light ◽  
Electrochemical Cells ◽  
Light Emitting

Bright and Efficient Red Light-Emitting Electrochemical Cells with Nondoped Organic Small Molecules: A New Approach

ACS Photonics ◽  
2021 ◽  
Author(s):  
Jino C. John ◽  
Kanagaraj Shanmugasundaram ◽  
Gopinadhanpillai Gopakumar ◽  
Youngson Choe
Keyword(s):  
Small Molecules ◽  
Red Light ◽  
Electrochemical Cells ◽  
New Approach ◽  
Light Emitting

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.

Efficient and Saturated Red Light‐Emitting Electrochemical Cells Based on Cationic Iridium(III) Complexes with EQE up to 9.4 %

2019 ◽  
Vol 25 (60) ◽  
pp. 13748-13758 ◽  
Author(s):  
Guang‐Xiang Yu ◽  
Chien‐Hsiang Lin ◽  
You‐Xuan Liu ◽  
Rong‐Huei Yi ◽  
Guan‐Yu Chen ◽  
...  
Keyword(s):  
Red Light ◽  
Electrochemical Cells ◽  
Light Emitting
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