Simple cuprous iodide complex-based crystals with deep blue emission and high photoluminescence quantum yield up to 100%

2019 ◽  
Vol 33 (3) ◽  
pp. e4731 ◽  
Author(s):  
Liyang Wang ◽  
Yanxue Guo ◽  
Baoyi Yu ◽  
Wei Zhang ◽  
Tengzhou Li ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Blue Emission ◽  
Deep Blue ◽  
Photoluminescence Quantum Yield ◽  
Iodide Complex

scholarly journals Efficient Exciplex-Based Deep-Blue Organic Light-Emitting Diodes Employing a Bis(4-fluorophenyl)amine-Substituted Heptazine Acceptor

Molecules ◽  
2021 ◽  
Vol 26 (18) ◽  
pp. 5568
Author(s):  
Jie Li ◽  
Heqi Gong ◽  
Jincheng Zhang ◽  
Hui Liu ◽  
Li Tao ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Blue Emission ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Deep Blue ◽  
Photoluminescence Quantum Yield ◽  
Organic Light ◽  
High Maximum ◽  
Exciplex Emission ◽  
Amine Groups

The realization of a deep-blue-emitting exciplex system is a herculean task in the field of organic light-emitting diodes (OLEDs) on account of a large red-shifted and broadened exciplex emission spectrum in comparison to those of the corresponding single compounds. Herein, 2,5,8-tris(di(4-fluorophenyl)amine)-1,3,4,6,7,9,9b-heptaazaphenalene (HAP-3FDPA) was designed as an electron acceptor by integrating three bis(4-fluorophenyl)amine groups into a heptazine core, while 1,3-di(9H-carbazol-9-yl)benzene (mCP) possessing two electron-donating carbazole moieties was chosen as the electron donor. Excitingly, the exciplex system of 8 wt% HAP-3FDPA:mCP exhibited deep-blue emission and a high photoluminescence quantum yield of 53.2%. More importantly, an OLED containing this exciplex system as an emitting layer showed deep-blue emission with Commission Internationale de l’Eclairage coordinates of (0.16, 0.12), a peak luminance of 15,148 cd m−2, and a rather high maximum external quantum efficiency of 10.2% along with a low roll-off. This study not only reports an efficient exciplex-based deep-blue emitter but also presents a feasible pathway to construct highly efficient deep-blue OLEDs based on exciplex systems.

scholarly journals Lead-free, stable, high-efficiency (52%) blue luminescent FA3Bi2Br9 perovskite quantum dots

2020 ◽  
Vol 5 (3) ◽  
pp. 580-585 ◽  
Author(s):  
Yalong Shen ◽  
Jun Yin ◽  
Bo Cai ◽  
Ziming Wang ◽  
Yuhang Dong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Room Temperature ◽  
High Efficiency ◽  
Blue Emission ◽  
Lead Free ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots ◽  
First Time

Lead-free Bi-based perovskite FA3Bi2X9 (X = Cl, Br, and I) quantum dots (QDs) are synthesized for the first time at room temperature. The ligand-passivated FA3Bi2Br9 QDs exhibit blue emission at 437 nm with photoluminescence quantum yield (PLQY) up to 52%.

Stable Deep Blue Emission with Unity Quantum Yield in Organic-Inorganic Halide Perovskite 2D Nanosheets Doped with Cerium and Terbium at High Concentrations

2021 ◽  
Author(s):  
Sumaiya Parveen ◽  
Ponnappa Kechanda Prasanna ◽  
Sudip Chakraborty ◽  
Pravat K. Giri
Keyword(s):  
Quantum Yield ◽  
Blue Emission ◽  
Lead Free ◽  
Deep Blue ◽  
Halide Perovskite ◽  
High Concentrations ◽  
Novel Strategy ◽  
2D Nanosheets

Despite recent efforts, achieving stable deep blue emission with near unity quantum yield from lead-free perovskite has remained a great challenge. Herein, we have developed a novel strategy to achieve...

Deep blue emitting Cu(i) tripod complexes. Design of high quantum yield materials showing TADF-assisted phosphorescence

2018 ◽  
Vol 47 (47) ◽  
pp. 17067-17076 ◽  
Author(s):  
Alexander Schinabeck ◽  
Nicholas Rau ◽  
Marius Klein ◽  
Jörg Sundermeyer ◽  
Hartmut Yersin
Keyword(s):  
Quantum Yield ◽  
High Quantum Yield ◽  
High Quantum ◽  
Deep Blue ◽  
Photoluminescence Quantum Yield ◽  
Singlet Harvesting

Triplet and singlet harvesting in combination with enhancing the emitter rigidity leads to a landmark value of the photoluminescence quantum yield for dissolved Cu(i) complexes.

Organic Laser Molecule with High Mobility, High Photoluminescence Quantum Yield, and Deep-Blue Lasing Characteristics

2020 ◽  
Vol 142 (13) ◽  
pp. 6332-6339 ◽  
Author(s):  
Dan Liu ◽  
Jianbo De ◽  
Haikuo Gao ◽  
Suqian Ma ◽  
Qi Ou ◽  
...  
Keyword(s):  
Quantum Yield ◽  
High Mobility ◽  
Deep Blue ◽  
Photoluminescence Quantum Yield ◽  
Organic Laser

scholarly journals Engineering Sr-doping for enabling long-term stable FAPb1−xSrxI3 quantum dots with 100% photoluminescence quantum yield

2021 ◽  
Vol 9 (5) ◽  
pp. 1555-1566
Author(s):  
Andrés F. Gualdrón-Reyes ◽  
David F. Macias-Pinilla ◽  
Sofia Masi ◽  
Carlos Echeverría-Arrondo ◽  
Said Agouram ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Toxic Metals ◽  
Environmentally Friendly ◽  
Photoluminescence Quantum Yield ◽  
Improved Performance ◽  
Pb Substitution

The Pb substitution in quantum dots (PQDs) with lesser toxic metals has been widely searched to be environmentally friendly, and be of comparable or improved performance compared to the lead-perovskite.

Near-Unity Photoluminescence Quantum Yield and Highly Suppressed Blinking in a Toxic-Metal-Free Quantum Dot

2021 ◽  
Vol 12 (5) ◽  
pp. 1426-1431
Author(s):  
Swarnali Ghosh ◽  
Saptarshi Mandal ◽  
Soumen Mukherjee ◽  
Chayan K. De ◽  
Tridib Samanta ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Quantum Dot ◽  
Toxic Metal ◽  
Metal Free ◽  
Photoluminescence Quantum Yield

Poly(Vinylidene Fluoride)-Passivated CsPbBr3 Perovskite Quantum Dots with Near-Unity Photoluminescence Quantum Yield and Superior Stability

2021 ◽  
Author(s):  
Lin Yang ◽  
Bowen Fu ◽  
Xu Li ◽  
Hao Chen ◽  
Lili Li
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Vinylidene Fluoride ◽  
Excellent Performance ◽  
Inorganic Perovskite ◽  
Photoluminescence Quantum Yield ◽  
Poly Vinylidene Fluoride ◽  
Perovskite Quantum Dots ◽  
Optoelectronic Applications ◽  
Pl Quenching

All inorganic perovskite quantum dots (QDs) have received great attention owing to their excellent performance in optoelectronic applications. However, they often suffer from the defect-related photoluminescence (PL) quenching and phase...

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