A convenient method to estimate the glass transition temperature of small organic semiconductor materials

For a long period of time, while the glass transition temperature (T_g) had been mainly focused on in polymer science, the T_g values of small organic materials have been recognized to be important not only in medicines but also in a wide variety of organic optoelectronics in recent years. In this study, we report a useful and convenient "melt-blending" method to estimate organic semiconductor materials' T_g values, which are hard to observe when each material exists independently. We revealed that some cases reported incorrect T_g values.