Abstract Developing transparent and highly refractive environmentally friendly polymers has not been realized yet toward sustainable optoelectronics. This work describes poly(thiourea)s ( PTU s) design following a new “polarizable group synergy” concept, combining polarizable hydrogen bonding groups aromatic‐based spacers to form densely packed high‐refractive‐index polymer networks. Specifically, PTUs containing m‐ p ‐phenylene exhibit an easy synthesis, high thermostability T g = 159 °C),...

White light-emitting electrochemical cells (LECs) comprising only [Cu(N^N)(P^P)]+ have not been reported yet, as all the attempts toward blue-emitting complexes failed. Multivariate analysis, based on prior-art -based thin-film lighting (>90 papers) and refined with computational calculations, identifies best design for LECs, that is, N^N: 2-(4-(tert-butyl)phenyl)-6-(3,5-dimethyl-1H-pyrazol-1-yl)pyridine P^P: 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene, to achieve predicted emission at...

This work describes the design and synthesis of a π-conjugated telluro[3,2-β][1]-tellurophene-based synthon that, embodying pyridyl haloaryl chalcogen-bonding acceptors, self-assembles into nanoribbons through chalcogen bonds. The ribbons π-stack in multi-layered architecture both single crystals thin films. Theoretical studies electronic states chalcogen-bonded material showed presence local charge density between Te N atoms. OTFT-based transport measurements hole-transport properties for...

Abstract A rational implementation and optimization of thermally activated delayed fluorescent (TADF) dendrimer emitters in light‐emitting electrochemical cells (LECs) sets the Dendri‐LEC family. They feature outstanding stabilities (90/1050 h for green/yellow devices) that are comparable to best Ir(III)‐complexes (450/500 h) conjugated polymers (33/5500 h), while offering benefits low‐cost synthesis easy upscaling. In particular, a fundamental molecular design capitalizes on exchanging...

Abstract This work describes the first use of blue‐emitting boron‐ and nitrogen‐doped carbon dots (BN‐CDs), rationalizing their photoluminescence behavior in solution ion‐based thin‐films to prepare white light‐emitting electrochemical cells (LECs). In detail, a cost‐effective scalable water‐based microwave‐assisted synthesis procedure is set for BN‐CDs featuring an amorphous carbon‐core doped with N B. While they show bright (photoluminescence quantum yield 42%) excitation‐independent...

Abstract Accomplishing sustainability in optoelectronics, general, and photovoltaics (PV), particular, represents a crucial milestone green photonics. Third generation PV technologies, such as organic solar cells (OSCs), perovskite (PSCs), dye‐sensitized (DSSCs) have reached mature age are slowly making their way the market complementary devices to first cells. For example, they well suited for high‐end smart applications, like flexible wearable devices, fully transparent windows,...

Abstract The design of red‐emitting silver(I) complexes and their implementation in thin‐film lighting are still challenging as (i) high ligand‐field splitting energy leads to high‐energy emissions with a controversial mechanism (thermally activated delayed fluorescence vs fluorescence/phosphorescence), (ii) low electrochemical stability the formation silver nanoclusters, limiting device few seconds. Herein, thoughtful complex [Ag(xantphos)(deebq)]PF 6 combining large‐bite angle diphosphine...

Abstract The synthesis, photophysical/electrochemical characterization, and implementation in light‐emitting electrochemical cells (LECs) of three novel red‐emitting heteroleptic [Cu(N ^ N)(P P)]PF 6 complexes are reported. complex design consists combining i) the bridged di(pyrazin‐2‐yl)sulfane N ligand with expanded π‐conjugation electro‐withdrawing 4‐(trifluoromethyl)pyrimidine moieties ii) [(diphenylphosphino)phenyl] ether (DPEphos) P ligand. effect substitution on photophysical,...

In this work, we study the interplay between hydrophilicity/hydrophobicity in cationic aggregation induced emitters, and their application light emitting electrochemical cells.

Abstract Light‐emitting electrochemical cells (LECs) are the simplest and cheapest solid‐state lighting technology for soft and/or single‐use purposes. However, a major concern is transition toward eco‐friendly devices (emitters/electrolytes/electrodes) to meet green optoelectronic requirements without jeopardizing device performance. In this context, study shows first biogenic electrolyte applied LECs, realizing self‐stable highly performing with cellulose‐based electrolytes combined...

Abstract Hybrid light‐emitting diodes based on photon down‐converting filters with metal organic frameworks (MOFs) are mainly restricted to cross‐breed materials (i.e., nonemissive MOFs host and guest emitters) due the lack of highly photostable luminescent (LMOFs). This work reports a sustainable cost‐effective blue‐emitting Zn‐based MOF ligand 1,1,2,2‐tetrakis(4‐(pyridin‐4‐yl)phenyl)ethene ( Zn‐2‐LMOF ) their host:guest hybrids Rhodamine B emitter RhB@LMOF toward blue‐ white‐emitting...

Abstract Enhancing low‐energy emitting Cu(I)‐ionic transition metal complexes (iTMCs) light‐emitting electrochemical cells (LECs) is of utmost importance towards Cu(I)‐iTMC‐based white‐emitting LECs. Here, the ancillary ligand design includes (i) extension π‐systems and (ii) insertion S‐bridge between heteroaromatics rings. This led to two novel heteroleptic Cu(I)‐iTMCs: 2‐(pyridin‐2‐yl‐l2‐azanyl)quinoline ( CuN2 ) 2‐(naphthalen‐2‐ylthio)quinoline CuS2 as N^N bis[(2‐diphenylphosphino)phenyl]...

The synthesis, characterization, and application in light‐emitting electrochemical cells (LECs) of two near‐infrared (NIR)‐emitting Pt‐porphyrins (Pt‐por) with none or 20 F atoms their respective Pt‐por polyads containing from 1 to 4 BODIPY (BDP) units ( PtBDP ) connected via tetra‐fluorophenyl triazole spacer groups are reported. functionalization PtBDPs is tuned respect the number BDP optimizing 1) NIR emission through an efficient energy transfer core, 2) electronic structure decouple...

In the last few years, imidazo[1,5-a]pyridine scaffolds and derivatives have attracted growing attention due to their unique chemical structure optical behaviors. this work, a series of pyridylimidazo[1,5-a]pyridine corresponding pyridinium salts were synthesized properties investigated evaluate effect quaternization on features both in solution polymeric matrix. A critical analysis based spectroscopic data, structures along with density functional theory calculation is reported address best...

Abstract Quasi‐2D perovskites provide new opportunities for lighting and display applications due to their high radiative recombination excellent stability. However, seldom attention has been placed on self‐stability/working operation under ambient storage. Herein, quasi‐2D perovskites/Polyethylene oxide (PEO) films are studied, showing an unforeseen photo‐brightening effect storage (i.e., increase of the photoluminescence quantum yield from 55% 74% after 100 days). In stark contrast, those...

Abstract A π‐expanded X‐type double [5]helicene comprising dihydropyracylene moieties was synthesized from commercially available acenaphthene. X‐ray crystallographic analysis revealed the unique highly twisted structure of compound resulting in occurrence two enantiomers which were separated by chiral HPLC, owing to their high conformational stability. The shows strongly bathochromically shifted UV/vis absorption and emission bands with small Stokes shift considerable photoluminescence...

Abstract Though photon‐induced electron donor features of fluorescent proteins (FPs) in solution suggest them as excellent photosensitizers, their poor stability upon device fabrication/operation is the today's frontier. This relates to immediate denaturation water‐free/less environments: inorganic/organic interfaces and/or organic solvent surroundings. study provides a fresh with family hybrid FPs, which peripheral carboxylic groups archetypal FPs ‐superfolder green protein (sfGFP) and...

Stable and efficient green hybrid light-emitting diodes (HLEDs) were fabricated from a highly emissive Mg( ii )-tetraphenyl ethylene derivative metal–organic framework embedded in polystyrene matrix (Mg-TBC MOF@PS).

Chromophores face applicability limitations due to their natural tendency aggregate, with a subsequent deactivation of emission features. Hence, there has been fast development aggregation induced (AIE) emitters, in which non-radiative motional is inhibited. However, fine control colloidal properties governing the emitting performance fundamental for application thin film optoelectronics. In addition, ion-based lighting devices, such as light electrochemical cells (LECs), requires design...

Abstract This work describes the design and synthesis of a π‐conjugated telluro[3,2‐ β ][1]‐tellurophene‐based synthon that, embodying pyridyl haloaryl chalcogen‐bonding acceptors, self‐assembles into nanoribbons through chalcogen bonds. The ribbons π‐stack in multi‐layered architecture both single crystals thin films. Theoretical studies electronic states chalcogen‐bonded material showed presence local charge density between Te N atoms. OTFT‐based transport measurements hole‐transport...

Bio-Derived Materials In article number 2100520, Rubén D. Costa and co-workers provided an extensive overview of emerging bio-derived materials suitable for organic solar cells, dye-sensitized cells perovskite cells. Their production, handling, characterization, implementation as bio-hybrid components, such substrates, electrodes, photoactive layers, carrier transporters, light-trapping sealant films are critically discussed.

Light-Emitting Electrochemical Cells In article number 2302483, research labs of Rubén D. Costa and Ken Albrecht, have joined efforts to develop light-emitting electrochemical cells combining thermally activated delayed fluorescent dendrimer emitters, biogenic electrolytes, graphene-based electrodes. These devices exhibit exceptional stability, comparable other state-of-the-art materials, while providing advantages, such as low-cost up-scalable synthesis, easy tunability using simple...