The greatest challenge facing humanity today is the detrimental effects of environmental pollution from greenhouse gases due to the dominating use of fossil fuels for power generation. The implementation of sustainable, clean, and renewable energy technologies combined with improved energy efficiency provides the most promising, cheapest, and safest way to achieve a marked reduction in energy-related greenhouse gas emissions. Energy-efficient technologies enable co-benefits, including climate change mitigation, environmental protection, and improved public health with much lower energy consumption. In the Lab of Energy Efficient Technologies, we aim to develop advanced energy materials with enhanced functionalities. The current research topics in the Lab include the measurements/analysis/optimization of functional characteristics of oxide thermoelectric materials and high-temperature superconductors, embedded with various dopants/additives in order to improve the performance of these materials for large-scale applications.