High-performance near-infrared (NIR) polymer light-emitting diodes (PLEDs) based on bipolar Ir(iii)-complex-grafted polymers

2021 ◽  
Vol 9 (1) ◽  
pp. 173-180
Author(s):  
Wentao Li ◽  
Baowen Wang ◽  
Tiezheng Miao ◽  
Jiaxiang Liu ◽  
Guorui Fu ◽  
...  
Keyword(s):  
High Performance ◽  
Near Infrared ◽  
Cost Effective ◽  
Device Performance ◽  
Grafted Polymers ◽  
Large Area ◽  
Light Emitting ◽  
Doped Polymers ◽  
Polymer Light Emitting Diodes ◽  
The Cost

Despite the cost-effective and large-area scalable advantages of NIR-PLEDs based on iridium(iii)-complex-doped polymers, the intrinsic phase-separation issue leading to inferior device performance is difficult to address.

scholarly journals Efficient white polymer light-emitting diodes (WPLEDs) based on covalent-grafting of [Zn2(MP)3(OAc)] into PVK

2020 ◽  
Vol 11 (10) ◽  
pp. 2640-2646 ◽  
Author(s):  
Guorui Fu ◽  
Yani He ◽  
Wentao Li ◽  
Tiezheng Miao ◽  
Xingqiang Lü ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Cost Effective ◽  
Large Area ◽  
Light Emitting ◽  
Grafted Polymer ◽  
Covalent Grafting ◽  
Polymer Light Emitting Diodes

Using [Zn2(MP)3(OAc)]-grafted polymer as a single emitting layer, record-high efficiencies and weak (ca. 25%) efficiency roll-off are realized for cost-effective and large-area flexible WPLEDs.

C1-symmetrical [Ir(C^N1)(C^N2)(N^O)]-tris-heteroleptic Ir(III)-complex with one strong N^O-ancillary -donor for efficient all-solution-processed near-infrared (NIR) polymer light-emitting diodes (PLEDs)

2022 ◽  
Author(s):  
Yan Zhang ◽  
Baowen Wang ◽  
Jiaxiang Liu ◽  
Xingqiang Lv ◽  
Guorui Fu ◽  
...  
Keyword(s):  
High Performance ◽  
Near Infrared ◽  
Light Emitting Diodes ◽  
Solution Processed ◽  
Performance Achievement ◽  
Light Emitting ◽  
Electronic Perturbation ◽  
Polymer Light Emitting Diodes

Among reliable vacuum-deposited or solution-processed NIR-OLEDs/PLEDs doped with NIR-emitting iridium(III)-complexes, high-performance achievement of their all-solution-processed NIR-PLEDs remains a great challenge. In this study, owing to the forceful electronic perturbation achieved...

C1-symmetric [Ir(C^N1)(C^N2)(N^O)]-tris-heteroleptic Ir(III)-complexes with horizontal orientation for efficient near-infrared (NIR) polymer light-emitting diodes (PLEDs)

2021 ◽  
Author(s):  
Wentao Li ◽  
Tiezheng Miao ◽  
Baowen Wang ◽  
Jiaxiang Liu ◽  
Xingqiang Lv ◽  
...  
Keyword(s):  
High Performance ◽  
Near Infrared ◽  
Light Emitting Diodes ◽  
Organic Polymer ◽  
Light Emitting ◽  
Horizontal Orientation ◽  
Polymer Light Emitting Diodes ◽  
Real Challenge

Using conventionally fac-[Ir(C^N)3]-homoleptic or [Ir(C^N)2(L^X)]-bis-heteroleptic iridium(III)-complexes with NIR-phosphorescence (NIR = near infrared) as dopants, the realization of their reliable NIR-OLEDs/PLEDs (organic/polymer light-emitting diodes) with high-performance remains a real challenge. In...

Controlling emitting dipole orientations by N^O-ancillary electronic effects of [Ir(C^N)2(N^O)]-heteroleptic Ir(III)-complexes towards efficient near-infrared (NIR) polymer light-emitting diodes (PLEDs)

2021 ◽  
Author(s):  
Siyu Hou ◽  
Jiaxiang Liu ◽  
Baowen Wang ◽  
Tiezheng Miao ◽  
Xingqiang Lv ◽  
...  
Keyword(s):  
High Performance ◽  
Near Infrared ◽  
Light Emitting Diodes ◽  
Organic Polymer ◽  
Electronic Effects ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes ◽  
Real Challenge

Despite the domination of conventional [Ir(C^N)2(L^X)]-bis-heteroleptic iridium(III)-complexes with NIR-phosphorescence (NIR = near infrared) as dopants for reliable NIR-OLEDs/PLEDs (organic/polymer light-emitting diodes), the achievement of their high-performance remains a real challenge....

Gravure contact printing of flexible, high-performance polymer light emitting diodes for large-area displays and lighting

2011 ◽  
Vol 1340 ◽  
Author(s):  
Alasdair J. Campbell ◽  
Dae-Young Chung ◽  
Jingsong Huang ◽  
Dong-Seok Leem ◽  
Donal D. C. Bradley
Keyword(s):  
High Performance ◽  
Light Emitting Diode ◽  
Hole Injection ◽  
Large Area ◽  
Contact Printing ◽  
Light Emitting ◽  
High Performance Polymer ◽  
Printing Technique ◽  
Polymer Light Emitting Diodes ◽  
Poly Styrene Sulfonate

ABSTRACTGravure contact printing is the highest volume, large area printing technique known. It is ideally suited for the fabrication of large-area polymer light emitting diode (PLED) based lighting, backlights and displays. Here we show how gravure can be used to fabricate the poly (3,4-ethylene dioxythiophene) : poly(styrene sulfonate) hole injection layer and the light emitting polymer emissive layer in a conventional PLED, as well as the cesium carbonate electron injection layer in an inverted PLED. The performance equals or exceeds that of devices where these layers are deposited by conventional spin-coating.

Geometrically isomeric [Ir(iqbt)(ppy)(hpa)] complexes with differential molecule orientations for efficient near-infrared (NIR) polymer light-emitting diodes (PLEDs)

2021 ◽  
Vol 9 (36) ◽  
pp. 12068-12072
Author(s):  
Wentao Li ◽  
Jiaxiang Liu ◽  
Baowen Wang ◽  
Siyu Hou ◽  
Xingqiang Lü ◽  
...  
Keyword(s):  
Near Infrared ◽  
Light Emitting Diodes ◽  
Dipole Transition ◽  
Transition Dipole ◽  
Light Emitting ◽  
Horizontal Orientation ◽  
Polymer Light Emitting Diodes

Based on geometrical isomerisation of [Ir(C^N1)(C^N2)((N^O))]-tris-heteroleptic Ir(iii)-complexes, the augmented transition dipole transition (TMD) with a preferential horizontal orientation, which is beneficial for their NIR-phosphorescence, is reported.

Electrically driven single microribbon based near-infrared exciton-polariton light-emitting diode

CrystEngComm ◽  
2021 ◽  
Author(s):  
Mingming Jiang ◽  
Fupeng Zhang ◽  
Kai Tang ◽  
Peng Wan ◽  
Caixia Kan
Keyword(s):  
High Performance ◽  
Near Infrared ◽  
Light Emitting Diodes ◽  
Light Emitting Diode ◽  
Light Sources ◽  
Coherent Light ◽  
Light Emitting ◽  
Exciton Polaritons ◽  
Laser Devices

Achieving electrically-driven exciton-polaritons has drawn substantial attention toward developing ultralow-threshold coherent light sources, containing polariton laser devices and high-performance light-emitting diodes (LEDs). In this work, we demonstrate an electrically driven...

scholarly journals High-performance large-area quasi-2D perovskite light-emitting diodes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Changjiu Sun ◽  
Yuanzhi Jiang ◽  
Minghuan Cui ◽  
Lu Qiao ◽  
Junli Wei ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Intermediate Phase ◽  
Formation Enthalpy ◽  
Phase Segregation ◽  
Phase Changes ◽  
Large Area ◽  
High Brightness ◽  
Light Emitting ◽  
Performance Decline

AbstractSerious performance decline arose for perovskite light-emitting diodes (PeLEDs) once the active area was enlarged. Here we investigate the failure mechanism of the widespread active film fabrication method; and ascribe severe phase-segregation to be the reason. We thereby introduce L-Norvaline to construct a COO−-coordinated intermediate phase with low formation enthalpy. The new intermediate phase changes the crystallization pathway, thereby suppressing the phase-segregation. Accordingly, high-quality large-area quasi-2D films with desirable properties are obtained. Based on this, we further rationally adjusted films’ recombination kinetics. We reported a series of highly-efficient green quasi-2D PeLEDs with active areas of 9.0 cm2. The peak EQE of 16.4% is achieved in <n > = 3, represent the most efficient large-area PeLEDs yet. Meanwhile, high brightness device with luminance up to 9.1 × 104 cd m−2 has achieved in <n> = 10 film.

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