Organic long-persistent luminescence can be observed in any film fabrication method, such as spin coated, thermally evaporated and melt casted. Although photophysical properties are independent on fabrication methods, OLPL intensity is strongly influenced by film thickness. In addition, m-MTDATA:PPT pair shows longer duration than that of TMB:PPT pair because of higher Phi(PL) of m-MTDATA:PPT pair.