TY - JOUR A1 - Ibrahim, Ahmed A. S. A1 - Bochmann, Arne A1 - Löhnert, Romy A1 - Mieller, Björn A1 - Wilde, Lutz A1 - Capraro, Beate A1 - Stelter, Michael A1 - Töpfer, Jörg T1 - Performance Enhancement of Ca3Co4O9‐based Transverse Multilayer Thermoelectric Generators for Low‐Power Applications N2 - Transverse thermoelectric generators (TTEG) enable conversion of thermal into electrical energy with perpendicular directions of the applied temperature gradient and the induced thermoelectric voltage. We report on the fabrication of transverse multilayer thermoelectric generators (TMLTEG) based on p‐type Ca3Co4O9 (CCO) ceramic tapes and printed silver which were conventionally sintered (CS) in air at 920°C or using pressure‐assisted sintering (PAS) at 920°C and 1.5 MPa. The thermoelectric performance of TMLTEGs was evaluated using analytical calculations and simulations. The transverse thermoelectric power factor and thermoelectric figure‐of‐merit of an artificial layered structure composed of CCO and silver were calculated and simulated as functions of layers tilt angle φ and metal‐to‐ceramic thickness ratio. TMLTEG devices with various CCO layer thicknesses of 150 µm, 100 µm, or 33 µm were fabricated and cofired at 920°C in air, which exhibit power outputs of 2.3 mW, 3.2 mW, and 4.1 mW at ΔT = 160 K, respectively. TMLTEGs which were cofired using PAS show a higher power density of 16.4 mW/cm3 at ΔT = 225 K. This enhancement in power (≈ 80%) is crucial for thermoelectric modules comprising multiple TMLTEG devices. The device measurements were compared with 3D simulations. KW - Ceramic multilayer KW - Thermoelectric generator KW - Pressure-assisted sintering PY - 2026 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-657868 DO - https://doi.org/10.1111/jace.70656 SN - 0002-7820 VL - 109 IS - 3 SP - 1 EP - 13 PB - Wiley Periodicals LLC. AN - OPUS4-65786 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -