Austrittsarbeitsbasierte Wasserstoffdetektion für Fahrzeuge mit Brennstoffzellenantrieb (English shop)

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This dissertation investigates the development of work-function-based hydrogen sensors for fuel cell vehicles, focusing on reliable hydrogen detection under demanding automotive operating conditions. It examines gas adsorption, surface reaction kinetics, and field-effect transistor (FET) sensor technologies, with particular attention to the temperature-dependent instability of platinum-based sensing layers.

Through experimental measurements, numerical simulations, and the development of modified sensing materials, the study explores methods for improving sensor stability and performance. A key result is the introduction of the Temperature Controlled Phase Transition FET (TPT-FET), which uses controlled surface phase transitions to determine hydrogen concentrations. The research demonstrates the potential of this sensor concept for reliable hydrogen detection across a broad temperature range, contributing to improved safety in hydrogen-powered vehicles.
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