Using renewable energy instead of fossil fuel is one of the most significant issues that needs to be solved. Thermoelectric devices can convert heat into electricity. They are silent, reliable, and scalable.In my PhD project, I will work on thermoelectric materials. By considering the theory and experiments, the amorphous TiNiSn will be checked in this project. It is predicted that amorphous TiNiSn could drastically increase efficiency and be useful for many applications, such as flexible and wearable green energy devices.