Photoluminescence and electroluminescence of a stilbene derivative

Since electroluminescence (EL) of 8-hydroquiniline (Alq3) and poly(p-phenylene vinylene) (PPV) was reported, organic electroluminescence has attracted intense interest because of their great academic and commercial signifigance([1-3]). Besides the exciton emission from pi* to pi, some new emission peaks can be observed sometimes due to the interaction between the molecules. These phenomena have been attributed to the formation of excimer or exciplex([4-7]). Formation of excimer is a key drawback because the color stability is an important basic requirement for the production of these devices([8]). So it is very important to study the behavior of excimer both in solution and film state. In this letter, the generation and recombination processes of excitons and excimers of a conjugated molecule, 1-(9-anthrylethynyl)-4-chloromethyl-2, 5-dimethoxybenzene (ACDB), are investigated through the measurement of the absorption, photoluminescence and electroluminescence of ACDB.