Molecularly engineered electroplex emission for an efficient near-infrared light-emitting electrochemical cell (NIR-LEC)

Shahroosvand, Hashem; Heydari, Leyla; Bideh, Babak Nemati; Pashaei, Babak

doi:10.1039/c9ra10761d

Cited by 5 publications

(7 citation statements)

References 69 publications

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“…[152] Since a high barrier is present at the 20) in 2020. [153] In this work, a novel cationic ruthenium complex 117 was used to replace the previous cationic zinc complex Chemistry-A European Journal 0.93 %). These two works of the blended LECs based on electroplex emission confirm a feasible way to deliver EL emission beyond that the individual emissive material can offer.…”

Section: Adjusting Intermolecular Interactionsmentioning

confidence: 99%

Long‐Wavelength Light‐Emitting Electrochemical Cells: Materials and Device Engineering

Lin

2022

Chemistry A European J

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Long‐wavelength light‐emitting electrochemical cells (LECs) are potential deep‐red and near infrared light sources with solution‐processable simple device architecture, low‐voltage operation, and compatibility with inert metal electrodes. Many scientific efforts have been made to material design and device engineering of the long‐wavelength LECs over the past two decades. The materials designed the for long‐wavelength LECs cover ionic transition metal complexes, small molecules, conjugated polymers, and perovskites. On the other hand, device engineering techniques, including spectral modification by adjusting microcavity effect, light outcoupling enhancement, energy down‐conversion from color conversion layers, and adjusting intermolecular interactions, are also helpful in improving the device performance of long‐wavelength LECs. In this review, recent advances in the long‐wavelength LECs are reviewed from the viewpoints of materials and device engineering. Finally, discussions on conclusion and outlook indicate possible directions for future developments of the long‐wavelength LECs. This review would like to pave the way for the researchers to design materials and device engineering techniques for the long‐wavelength LECs in the applications of displays, bio‐imaging, telecommunication, and night‐vision displays.

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Section: Adjusting Intermolecular Interactionsmentioning

confidence: 99%

Long‐Wavelength Light‐Emitting Electrochemical Cells: Materials and Device Engineering

Lin

2022

Chemistry A European J

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“…LECs are also a kind of solid-state lighting device, but with a single emission layer inserted between the anode and cathode, rather than a multi-layered structure made up of several layers of components like OLEDs [ 172 ]. However, most of the emitters of NIR LECs are transition metal complexes [ 173 , 174 , 175 ], only a few of heavy metal-free emitters have been reported [ 176 ]. And we have also done some research work on polymers [ 20 ].…”

Section: Nir Phosphorescent Materials Based On Small Moleculesmentioning

confidence: 99%

Progresses and Perspectives of Near-Infrared Emission Materials with “Heavy Metal-Free” Organic Compounds for Electroluminescence

et al. 2022

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Organic/polymer light-emitting diodes (OLEDs/PLEDs) have attracted a rising number of investigations due to their promising applications for high-resolution fullcolor displays and energy-saving solid-state lightings. Near-infrared (NIR) emitting dyes have gained increasing attention for their potential applications in electroluminescence and optical imaging in optical tele-communication platforms, sensing and medical diagnosis in recent decades. And a growing number of people focus on the “heavy metal-free” NIR electroluminescent materials to gain more design freedom with cost advantage. This review presents recent progresses in conjugated polymers and organic molecules for OLEDs/PLEDs according to their different luminous mechanism and constructing systems. The relationships between the organic fluorophores structures and electroluminescence properties are the main focus of this review. Finally, the approaches to enhance the performance of NIR OLEDs/PLEDs are described briefly. We hope that this review could provide a new perspective for NIR materials and inspire breakthroughs in fundamental research and applications.

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“…In these reported studies, deep-red LECs based on phosphor-sensitized fluorescence 29,30 outperform other types of deep-red LECs, i.e., employing small molecules, [31][32][33][34][35] conjugated polymers, [36][37][38][39][40] and iTMCs. [41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57] Phosphor-sensitized fluorescence has been proven to be useful in increasing device efficiencies of fluorescent OLEDs to the levels similar to those of phosphorescent OLEDs. 62 Phosphorsensitized fluorescent LECs have also been demonstrated to have significantly improved device efficiencies.…”

Section: Introductionmentioning

confidence: 99%

“…21–28 However, the reported long-wavelength, i.e. , deep-red and near-infrared (NIR) LECs, which have great potential applications in bio-imaging, telecommunication, night-vision displays, and chemical sensing, commonly showed low device efficiencies, 29–61 hindering their commercialization. In these reported studies, deep-red LECs based on phosphor-sensitized fluorescence 29,30 outperform other types of deep-red LECs, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…, employing small molecules, 31–35 conjugated polymers, 36–40 and iTMCs. 41–57 Phosphor-sensitized fluorescence has been proven to be useful in increasing device efficiencies of fluorescent OLEDs to the levels similar to those of phosphorescent OLEDs. 62 Phosphor-sensitized fluorescent LECs have also been demonstrated to have significantly improved device efficiencies.…”

Section: Introductionmentioning

confidence: 99%

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Deep-red light-emitting electrochemical cells based on phosphor-sensitized thermally activated delayed fluorescence

Chen

Wang

et al. 2022

J. Mater. Chem. C

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Molecularly engineered electroplex emission for an efficient near-infrared light-emitting electrochemical cell (NIR-LEC)

Abstract: Electroplex emission is rarely seen in ruthenium polypyridyl complexes, and there have been no reports from light-emitting electrochemical cells (LECs) to date. Here, near-infrared (NIR) emission via the electroplex mechanism in a LEC was reported.

Cited by 5 publications

References 69 publications

Long‐Wavelength Light‐Emitting Electrochemical Cells: Materials and Device Engineering

Long‐Wavelength Light‐Emitting Electrochemical Cells: Materials and Device Engineering

Progresses and Perspectives of Near-Infrared Emission Materials with “Heavy Metal-Free” Organic Compounds for Electroluminescence

Deep-red light-emitting electrochemical cells based on phosphor-sensitized thermally activated delayed fluorescence

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