< Back to previous page

Project

Porphyrinoid materials for near-infrared organic photodetectors (R-8199)

The eminent threat of terrorism has caused safety and surveillance to become increasingly important aspects in our daily lives. Infrared image sensors can enhance our security by enabling night vision, thermal imaging and chemical sensing applications. To date, the so-called hybrid technology is used for these image sensors, in which both the photodetector (PD) and the electronic readout are prepared separately and then interconnected at the pixel level. Obviously, this is a time-consuming process, resulting in low throughput and thus high cost. A monolithic approach is hence more attractive. Attempts to apply this technology to the state of the art inorganic low bandgap absorbers are, however, not very successful because of compatibility issues. In this respect, organic semiconductors are much more appealing. As Nature itself has developed porphyrins as light-harvesting chromophores, it feels natural to pursue PD systems based on similar molecules. Moreover, the versatility of porphyrinoid chemistry allows to extend their absorption to the near-infrared (NIR). In this project I will prepare advanced push-pull type porphyrinoid materials with very low bandgaps with a particular emphasis on corroles, contracted porphyrin derivatives with a specific coordination behavior and distinct photophysical features by optimized synthetic sequences and I will evaluate them in NIR organic PDs, with the specific aim to prepare devices competitive with their inorganic counterparts.
Date:1 Oct 2017 →  30 Sep 2019
Keywords:corroles, low bandgap, nabij infrarood fotodetectoren., porphyrins, Safety and surveillance
Disciplines:Macromolecular and materials chemistry, Organic chemistry, Process engineering, Polymeric materials