Flexible Electronics and Photovoltaics (FEP)

FEP image

Flexible Electronics and Photovoltaics Program

Charge transport along and across interfaces is central to the operation of all organic electronic and optoelectronic devices, including organic light-emitting diodes (OLEDs), field effect transistors (OFETs), and photovoltaic cells (OPVs). The efficiency of OLEDs, for example, relies on the transport of charge across multiple organic and metal- organic heterojunctions, as well as the confinement of molecular excited states at interfaces. Continued expansion of organic optoelectronics in displays, solid-state lighting, printed flexible electronics, sensing, photodetection, and solar energy conversion requires performance improvements in OLEDs, OFETs and OPVs, where interfacial properties dominate performance. The goal of the Flexible Electronics and Photovoltaics (FEP) Program is: (1) to employ cutting- edge  characterization methods to determine structure-property relationships at organic optoelectronic interfaces, and (2) to use this knowledge to prepare organic  interfaces  with  improved  performance  in  devices,  particularly  OFETs, OPVs, and electrically pumped organic lasers. FEP faculty are also increasingly interested in developing methods to print active organic devices on flexible substrates. To achieve these goals we have assembled a student/faculty team with expertise spanning organic synthesis, film growth and processing, structure  characterization,  spectroscopy, charge transport,  computation, device fabrication, and modeling.

The FEP program greatly expands the scope of organic electronic materials research at Minnesota. A principal distinction of the program is its focus on optical properties of organic semiconductors in addition to electronic properties. This is exemplified in the enhanced emphasis on spectroscopy embodied by Blank, Massari, and Zhu, and in the participation of Holmes, who brings expertise in OLEDs,
Organic electronic

lasers, and OPVs. This broader scope was implemented in response to the growing importance of optoelectronic devices in applications such as display, lighting, detection, and solar energy conversion. The FEP program is unique in the U.S. in its comprehensive approach to organic semiconductors research, combining broad expertise in materials synthesis, thin film characterization and devices with cutting-edge spectroscopy and theory. The interdisciplinary character will help researchers to uncover fundamental structure- property relationships, to improve materials synthesis and processing, and to develop new device paradigms as a result of its integration of diverse and complementary areas of expertise.

Principal Investigators and their primary areas of expertise:

Russell Holmes Program Leader                   OLEDs, Solar Cells, Thin Flim Growth

David Blank                                                    Ultrafast Optical Spectroscopy

Chris Douglas                                                  Organic Synthesis

C. Daniel Frisbie                                              Organic Electonics, OFETs, AFM

Vivian Ferry                                                     Optical materials, plasmonics, metamaterials, nanocrystals

Contact: To learn more about the Flexible Electronics and Photovoltaics program & IPRIME visit the IPRIME website www.iprime.umn.edu.