Dopants, Interface Modifiers, and Film Tethering for Organic Semiconductors
Abstract
We propose a program to build on our previous work relevant to organic photovoltaics (OPVs), focusing on new dopants, new redox-active surface modifiers, and approaches to immobilize and insolubilize organic films of varied thicknesses. These materials can accelerate the development of a variety of scalable organic electronic devices and their properties and use in devices will be investigated by our team and through collaboration with a variety of groups worldwide. For example organic semiconductors are useful for organic light-emitting diodes (OLEDs), OPVs, organic transistors, organic thermoelectrics, organic memory devices, and organic thermoelectrics, as well as some hybrid devices such as metal-halide perovskite-based LEDs and PVs. Many of these devices are relevant to Navalapplications; e.g., OPVs are relevant to light-weight large-area systems for expeditionary power during Marine Corps operation, OLEDs can be used as displays, and stretchable transistors and sensors may be useful for health monitoring. In many of these devices electrical doping can be useful for modulating charge-carrier densities and injection barriers; e.g. in OPVs to compensate for the effects of traps in the bulk heterojunction or, at higher densities, to increase hole- or electron-transport (HT or ET) layer conductivity. Carrier collection by / injection from metal-oxide electrodes can also be modulated through self-assembling monolayers of dipolar phosphonic acids, while other phosphonic acids bearing redox-active groups have recently been found to be useful as HT interlayers in organic (and perovskite) PVs. Another approach to HT/ET layers is to use thin layers of molecular or polymeric species, and in this approach methods for fine control of film thickness and for multilayer solution deposition are needed. We propose working on several current issues relating to such dopant and interlayer materials. Approved for public release.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 24, 2024
- Source ID
- N000142412115
Entities
People
- Seth Marder
Organizations
- Office of Naval Research
- Regents of the University of Colorado
- United States Navy