Film Electrochemiluminescence Controlled by Interfacial Reactions Along with Aggregation‐, Matrix‐Coordination‐, and Crystallization‐Induced Emissions

Abstract

ECL enhancements of nanoparticle films and an in-depth analysis of the application of this knowledge into development of optoelectronics follow. Finally, recent novel crystallization induced ECL enhancements and hypochromic shifts are provided. Future analyses of these film ECL enhancement phenomena will provide complementary information for the optimal implementation of next generation luminophores into thin film optoelectronic and sensing applications.

Physical Strategy to Determine Absolute Electrochemiluminescence Quantum Efficiencies of Coreactant Systems Using a Photon-Counting Photomultiplier Device

“…This problem is only exacerbated in ECL studies, where solvent and coreactant choice, luminophore and electrolyte concentrations, and varying electrode materials can all disproportionately influence the ECL performance of the system relative to the standard. A more recent challenge comes from measuring the emission of modified film electrodes and aggregation-induced ECL, − where very significant mechanistic and matrix-related differences can occur. Second, because eq does not consider the emission wavelength, significantly underestimated or overestimated efficiencies may occur due to photodetector wavelength-dependent responsivities.…”

Absolute Electrochemiluminescence Efficiency Quantification Strategy Exemplified with Ru(bpy)32+ in the Annihilation Pathway

“…19 Especially, the relative QE procedure is really tough to use in recently advanced film ECL investigations. 9 As a consequence of the lack of standards, the reported ECL efficiency experimental conditions are needed to interpret the results, which can diminish the impact of ECL research. ECL research can grow faster if absolute measurement procedures are implemented, akin to the NIST methods of PLQY testing.…”

Closely Following Equivalent Circuit Changes during Operation of Graphene Dot Light‐Emitting Electrochemical Cells

“…Many types of light emitters have been studied for LECs such as emissive polymers, [1a,4] ionic transition metal complexes (iTMCs), [5] quantum dots, [6] perovskites [7] and small organic compounds [8] . One of the least studied of these emitters are quantum dots among which graphene quantum dots (GQDs) are presented to be a great organic alternative to expensive iTMC and emissive polymers [9] . However, the electrical characteristics of a device as well as the common device failure mechanisms are not well understood.…”

“…[8] One of the least studied of these emitters are quantum dots among which graphene quantum dots (GQDs) are presented to be a great organic alternative to expensive iTMC and emissive polymers. [9] However, the electrical characteristics of a device as well as the common device failure mechanisms are not well understood. "Black spots" are sometimes a reversible indicator of heavy ion doping promoted by a stoichiometrically dynamic cathode j polymer and are attributed to device deterioration over long LEC operation times.…”