Fundamentals of Molecular Electrical Doping of Organic Semiconductors

Today´s information society depends on our ability to controllably dope inorganic semiconductors, such as silicon, thereby tuning their electrical properties to application-specific demands. For opto-electronic devices, however, organic semiconductors have emerged as superior alternative owing to the ease of tuning their optical gap through chemical variability and their potential for low-cost, large area processingon flexible substrates. There, the potential of molecular electrical doping for improving the performance of, e.g., organic light-emitting devices or organic solar cells, has only recently been established. The doping efficiency, however, remains conspiciuously low, highlighting the fact that the underlying, fundamental mechanisms of molecular electrical doping in organic semiconductors are only little understood compared to their inorganic counterparts. In particular, this is reflected in the observation that two important classes of organic semiconductors, small conjugated molecules and conjugated polymers, exhibit a vastly different phenomenology upon doping with no satisfactory explanation put forward to date. This project proposes to solve this important problem and, therby, to enable the truly knowledge-based improvement of existing organic opto-electronic devices as well as the realization of entirely new functionalities.

Principal Investigators
Cocchi, Caterina (Details) (Theoretical Physics / Solid State Theory)

Duration of Project
Start date: 03/2016
End date: 10/2019

Last updated on 2020-18-03 at 23:07