THERMOCOOL addresses critical global challenges – energy transition and digitalization. With 20% of global energy used for cooling, and 1.6 billion AC units in use, energy-efficient alternatives are vital. Thermoelectric coolers (TE) offer a solution, saving 1795 kWh/y and reducing CO2 emissions by 38% per person compared to standard AC. Additionally, TE has applications in high-power computing and batteries where conventional cooling falls short. The project leverages novel thermoelectric materials to drive advancements. In parallel, THERMOCOOL contributes to digitalization. The Internet of Everything (IoE) necessitates trillions of connected devices. To power them sustainably, thermal energy harvesters are explored, tapping into heat sources like the human body, buildings, and the sun. This approach reduces maintenance costs and indirectly cuts CO2 emissions by optimizing information flows. THERMOCOOL focuses on three key objectives: 1.Enhancing the efficiency of energy conversion devices, including thermoelectric generators and pyroelectric generators for electricity generation, and thermoelectric coolers and electrocaloric coolers for cooling. 2. Prioritizing low-cost, sustainable materials with minimal reliance on critical raw materials and emphasizing recyclability. 3.Demonstrating the effectiveness of these technologies in challenging environments where conventional systems are less efficient. Collaborative research will elevate these technologies from TRL3 to TRL5, involving researchers with complementary expertise in thermoelectric and ferroelectric materials. These solid-state devices share key advantages: zero maintenance costs, compactness, lightweight, silence, and environmental friendliness. They have the potential to revolutionize energy conversion and cooling, addressing pressing global challenges. THERMOCOOL offers efficient, low-cost, and eco-friendly solutions that will benefit society, the environment, and the economy, heralding a promising future.