Patent ID: 8934089
Filing Date: 2015-01-13
Classification: G01N

Abstract:
1. An apparatus for analysis of an electroluminescence sample comprising: a pulse generator configured for applying a pulse driving signal to the electroluminescence sample; an electroluminescence (EL) detector configured for acquiring a light-receiving signal by receiving electroluminescence emitted from the electroluminescence sample as a result of application of the pulse driving signal, wherein the light-receiving signal obtained by the EL detector is one of a photo current signal, a photo voltage signal and a capacitance signal; a temperature controller configured for varying the temperature of the electroluminescence sample; and an electroluminescence transient spectroscopy (ELTS) analysis unit configured for acquiring information on a defective charge trap existing in the electroluminescence sample by analyzing a change in a transient section of the light-receiving signal according to a temperature change of the electroluminescence sample, wherein the ELTS analysis unit is configured for obtaining at least one of information on an activation energy level of the defective charge trap, a concentration of the defective charge trap and a capture cross-section of the defective charge trap by sampling two time points in the transient section of the light-receiving signal, calculating a difference of the light-receiving signal at the two sampled time points, and using a relation of change in the difference of the light-receiving signal according to the temperature change.