Method of screening for electron transport material and hole blocking material used in organic light emitting device
摘要
說明書
Generally, to examine electrochemical behaviors of oxidation and reduction reactions, linear sweep voltammetry (LSV) and cyclic voltammetry (CV) are frequently used. These two methods are common in that a voltage is scanned at a constant rate with respect to a working electrode where the reaction of interest occurs, and the resulting current change is measured. However, of them, cyclic voltammetry (CV) is useful in that whether or not the reaction is reversible may be determined by repeatedly measuring the experiment for each cycle.
In the cyclic voltammetry (CV), in the case of a reversible reaction, oxidation/reduction rates are influenced only by an electron transfer rate, i.e., an electron diffusion rate, and anodic peak potential and cathodic peak potential do not change with the scan rate. Thus, the electron transfer rate in the reversible reaction may be obtained by calculating a diffusion coefficient (D) satisfying the Randles-Sevcik Mathematical equation represented by the following Mathematical equation 3:
