Hybrid organic–inorganic and all-inorganic metal halide perovskites have been one of the most intensively studied materials during last few years.

Abstract Solid‐state lighting (SSL) is one of the biggest achievements 20 th century. It has completely changed our modern life with respect to general illumination (light‐emitting diodes), flat devices and displays (organic light‐emitting small labeling systems electrochemical cells). Nowadays, it however mandatory make a transition toward green, sustainable, equally performing systems. In this regard, several groups have realized that actual SSL technologies can easily efficiently be...

Abstract Recently, the use of a new family electroluminescent copper(I) complexes—i.e., archetypal [Cu(IPr)(3‐Medpa)][PF 6 ] complex; IPr: 1,3‐bis‐(2,6‐di‐iso‐propylphenyl)imidazole‐2‐ylidene; 3‐Medpa: 2,2′‐bis‐(3‐methylpyridyl)amine—has led to blue light‐emitting electrochemical cells (LECs) featuring luminances 20 cd m −2 , stabilities 4 mJ, and efficiencies 0.17 A −1 . Herein, this study rationalizes how enhance these figures‐of‐merit optimizing both device fabrication design. On one...

This work reports on the positive impact of (i) attaching methoxy groups at ortho position bipyridine ligand (6,6′-dimethoxy-2,2′-bipyridine) in heteroleptic copper(I) complexes belonging to [Cu(bpy)(POP)]+ family, and (ii) a new device design comprising multilayered architecture decouple hole/electron injection transport processes performance light-emitting electrochemical cells (LECs). In short, substituted complex showed enhanced thermal- photostability, photoluminescence, ionic...

Abstract The synthesis and characterization, as well photoluminescent electrochemical features of a series ionic copper(I) complexes—, i.e., [Cu(N ^ N)(P P)] + , where N is 4,4′‐diethylester‐2,2′‐biquinoline (dcbq) P bis‐triphenylphosphine, bis[2‐(diphenylphosphino)phenyl)ether] (POP), or 4,5‐bis(diphenylphosphino)‐9,9‐dimethylxanthene (Xantphos)—are reported along with their application to achieve both deep‐red white light‐emitting cells (LECs). In short, the first Cu(I)‐based LECs...

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...

Abstract Since the birth of light‐emitting electrochemical cells (LECs) in 1995, white LECs (WLECs) still represent a milestone. To date, over 50 contributions have been reported, presenting record WLECs with brightness up to 10 000 cd m −2 , efficiencies >10 A −1 and excellent color rendering index >90 different contributions. This is achieved following three main strategies focused on modifying: i) design emitters, that is, emissive aggregates, multiemissive mechanism,...

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...

All for one and all! The first white-emitting organometallo-silica nanoparticles, based on the formation of organometallic dots (ODs), have been applied to design most stable single-component white emitting hybrid light-emitting diodes, which closely mimics sunlight.

Abstract Ionic transition‐metal complexes based on silver(I) metal core (Ag‐iTMCs) represent an appealing alternative to other iTMCs in solid‐state lighting owing (i) their low cost and well‐known synthesis, (ii) the tunable bandgap, (iii) highly efficient photoluminescence. However, electroluminescence behavior is barely studied. Herein, archetypal green‐emitting Ag‐iTMCs, namely [Ag(4,4′‐dimethoxy‐2,2′‐bipyridine)(Xantphos)]X (X = BF 4 , PF 6 ClO ), are thoughtfully investigated, revealing...

Abstract White‐light‐emitting electrochemical cells (WLECs) still represent a significant milestone, since only few examples with moderate performances have been reported. Particularly, multiemissive white emitters are highly desired, as paradigm to circumvent phase separation and voltage‐dependent emission color issues that encountered following host:guest multilayered approaches. Herein, the origin of exclusive ternary electroluminescent behavior BN‐doped nanographenes B 3 N doping pattern...

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,...

Self-heating in light-emitting electrochemical cells (LECs) has been long overlooked, while it a significant impact on (i) device chromaticity by changing the electroluminescent band shape, (ii) efficiency because of thermal quenching and exciton dissociation reducing external quantum (EQE), (iii) stability degradation excitons eliminate doped species, phase separation, collapse intrinsic emitting zone. Herein, we reveal, for first time, direct relationship between self-heating early changes...

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,...

The synthesis and characterization of a family copper( i ) complexes bearing bridged bis-pyridyl ancillary ligand is reported, highlighting how the bridge nature impacts photo- electro-luminescent behaviours within family.

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...

This work describes the synthesis, and structural, spectroscopic, theoretical studies of a mononuclear silver(i) complex with formula [Ag(Xantphos)(4,4'-(MeO)2-2,2'-bipy)]BF4·DCM (1·BF4) [Xantphos: 4,5-bis(diphenylphosphino)-9,9'-dimethylxanthene]. We provide meaningful insights into enhancement photoluminescence features this compared to its copper(i) analogue.

A red-emitting contorted hexabenzoovalene yielded bright and stable light-emitting electrochemical cells showing electric-field dependent emission.

Abstract Self‐stability in light‐emitting electrochemical cells (LECs) based on Ir(III) ionic transition metal complexes (Ir‐iTMC) has been long overlooked. Herein, it is demonstrated that the nature of active layer blending an archetype Ir‐iTMC as emitter and electrolytes—ionic liquid (IL) or polyelectrolyte (IP)—is paramount for storage mechanical stability rigid/flexible LECs. Strikingly, devices with polyelectrolytes (IPs) stand out compared to those traditional configurations without...

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...