Controlling charge equilibration and recombination at semiconductor interfaces is essential for the design of efficient and cost-effective silicon-based devices in applications such as photoelectrochemical solar cells, microelectronics, and sensors. Towards the exploration of new pathways to manipulate the electronic properties of semiconductor interfaces, in this work we report our ongoing investigation into the utilization of surface chemical functionalization as a strategy to passivate the interfacial recombination and tune the energetic alignment of silicon interfaces. Our research efforts focus specifically on the covalent functionalization of p-type silicon with mixed monolayers containing positive molecular dipoles as a way to induce a positive band-edge shift and improve the energetic alignment between p-silicon photocathodes and high work function contacting phases. In this presentation, we will report our latest results on the development of new synthetic pathways for the preparation of mixed monolayers on silicon and on the photoelectrochemical properties of p-silicon photocathodes functionalized with mixed monolayers.
5:00 PM–7:00 PM Apr 23, 2019 (US - Arizona)
PCC North, 300 Level, Exhibit Hall C-E