Poor electron-acceptor atoms. Scientists artificially construct a molecule in which the “rich” and “poor” parts are separat and maximally isolat from each other. When a molecule has such a structure, under the influence of electricity or light, the “flame of revolution” flares up – a struggle for electrons arises between “rich” and “poor” atoms. It leads to – an excitation state when an electron finds itself in an “hole” of an acceptor. Accompanying this struggle are flashes of light (the result of the decay of singlet excitons) and heat (the result of the decay of triplet excitons.
The appearance of an exciton
To achieve the maximum glow effect, it is necessary Nigeria Phone Number List to turn triplet excitons, which make up 75% of all emerging excitons, into singlet ones, Konstantin Ivanov, 2nd year postgraduate student, Faculty of Natural Sciences, Novosibirsk State University: and a triplet state is like the number of steps on a flight of stairs between floors (how much energy do you ne to expend to go from one state to another). If the difference is large, then there are many steps, and there is not enough energy for the transition. If the difference is small, the transition requires very little energy, which can be obtain literally from the environment – from vibrations of molecules.
The fact that the singlet state exists
Which are determin by the temperature of the USA CFO environment. Accordingly, in order to obtain fluorescence with an efficiency of 100%, we “raise” the triplet levels closer to the singlets (ruce the number of steps) so that the triplets easily (with less energy consumption) “jump” into singlets and begin to emit light. Due to only for a nanosecond, and triplets live 10 thousand times longer, Blue, r, green Depending on which chemical groups are chosen as donors and acceptors in the emitter, the spectral color of the radiation changes. The most important (and sometimes difficult to reproduce) are Ls in the r and blue parts of the spectrum.