Electronic equipment Thermoelectric equipment 53 Thermoelectric generators 13 Thin films 11 Zinc oxide 11 Sol-gels 10 Sol-gel process 8 Field emission microscopes 6 Oxide films 6 Scanning electron microscopy 6 Substrates 6 Titanium dioxide 6 Waste heat 6 Waste heat utilization 6 Atomic force microscopy 5 Coatings 5 Energy gap 5 Field emission scanning electron microscopy 5 Optical properties 5 Thermoelectric generator 5 Tin oxides 5 Annealing 4 Electron devices 4 Environmental technology 4 Heat exchangers 4 Heat pipes 4 II-VI semiconductors 4 Optical films 4 Sol-gel spin coating 4 Surface profilers 4