TY - THES ID - 135312447 TI - Evaluating the performance of laser-printed thermoelectrics films and correlating with their composition and nanostructure AU - Li, Qiyuan AU - Molina Lopez, Francisco AU - KU Leuven. Faculteit Ingenieurswetenschappen. Opleiding Master of Materials Engineering (Leuven) PY - 2023 PB - Leuven KU Leuven. Faculteit Ingenieurswetenschappen DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:135312447 AB - Nowadays, energy shortage has been an important issue in the world. Thermoelectric (TE) materials which can transfer temperature difference to electricity or vice versa have been addressed a lot of attention because of its potential for sustainability. The application of TE materials can also alleviate the demand for fossils. Bi2Te3 is one of the most commercial TE materials. Bi2Te3 with 3wt% excess Te is n-type and can switch to p-type by laser-induced Te evaporation via 3D Selective Laser Sintering (SLS) printing which is a technology of additive manufacturing (AM) and can minimize the waste. In this research, a printable film was prepared via blade coating with precise control of thickness, since green material thickness also has an impact on Seebeck coefficient. We found that TE performances are strong related to the laser power. With stronger power, samples have the trend to become more p-type. Through post treatments, including pre-sintering, cold pressing and post sintering, TE performances were further enhanced. The samples were also encapsulated with PDMS layer to achieve the flexibility. Young’s modulus of PDMS with different mixing ratio were obtained by tensile test. ER -