Percolation, tie-molecules, and microstructural origins of charge transport in semicrystalline conjugated polymers (Presentation Recording)

Sonya A. Mollinger; Brad Krajina; Rodrigo J. Noriega-Manez; Alberto Salleo; Andrew J. Spakowitz

doi:10.1117/12.2188455

5 October 2015 Percolation, tie-molecules, and microstructural origins of charge transport in semicrystalline conjugated polymers (Presentation Recording)

Sonya A. Mollinger, Brad Krajina, Rodrigo J. Noriega-Manez, Alberto Salleo, Andrew J. Spakowitz

Author Affiliations +

Proceedings Volume 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII; 95680V (2015) https://doi.org/10.1117/12.2188455
Event: SPIE Organic Photonics + Electronics, 2015, San Diego, California, United States

Abstract

Semiconducting polymers play an important role in a wide range of optical and electronic material applications. Polymer thin films that result in the highest performance typically have a complex semicrystalline morphology, indicating that considerable device improvement can be achieved through optimization of microstructural properties. However, the connection between molecular ordering and device performance is difficult to predict due to the current need for a mathematical theory of the physics that dictates charge transport in semiconducting polymers. It is experimentally suggested that efficient transport in such films occurs via connected networks of crystallites. We present an analytical and computational description of semicrystalline conjugated polymer materials that captures the impact of polymer conformation on charge transport in heterogeneous thin films. We first develop an analytical theory for the statistical behavior of a polymer emanating from a crystallite and predict the average distance to the first kink in the chain that traps a charge. We use this analysis to define the conditions for percolation and the consequent efficient transport through a semicrystalline material. We then establish a charge transport model using Monte Carlo simulations that predicts the multi-scale charge transport and crystallite connections. We approximate the thin film as a two-dimensional grid of crystallites embedded in amorphous polymer. The chain conformations in the amorphous region are determined by the wormlike chain model, and the crystallites are assigned fixed mobilities. We use this model to identify limits of charge transport at various time scales for varying fraction of crystallinity.

Conference Presentation

Citation Download Citation

Sonya A. Mollinger, Brad Krajina, Rodrigo J. Noriega-Manez, Alberto Salleo, and Andrew J. Spakowitz "Percolation, tie-molecules, and microstructural origins of charge transport in semicrystalline conjugated polymers (Presentation Recording)", Proc. SPIE 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII, 95680V (5 October 2015); https://doi.org/10.1117/12.2188455

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Polymers

Crystals

Statistical analysis

Semiconductors

Thin films

Monte Carlo methods

Physics

Show All Keywords

Keywords/Phrases

Search In:

Publication Years