Design rules for organic D-A heterojunctions: pathway for charge splitting
(Conference Presentation)

Denis Andrienko; Carl Poelking; Pascal Kordt

doi:10.1117/12.2236312

11 November 2016 Design rules for organic D-A heterojunctions: pathway for charge splitting (Conference Presentation)

Denis Andrienko, Carl Poelking, Pascal Kordt

Proceedings Volume 9923, Physical Chemistry of Interfaces and Nanomaterials XV; 992305 (2016) https://doi.org/10.1117/12.2236312
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

Organic solar cells rely on the conversion of a Frenkel exciton into free charges via a charge transfer state formed on a molecular donor-acceptor pair. These charge transfer states are strongly bound by Coulomb interactions, and yet efficiently converted into charge-separated states. A microscopic understanding of this process, though crucial to the functionality of any solar cell, has not yet been achieved. Here we show how long-range molecular order and interfacial mixing generate homogeneous electrostatic forces that can drive charge separation and prevent minority-carrier trapping across a donor-acceptor interphase. Comparing a variety of small-molecule donor-fullerene combinations, we illustrate how tuning of molecular orientation and interfacial mixing leads to a tradeoff between photovoltaic gap and charge-splitting and detrapping forces, with consequences for the design of efficient photovoltaic devices.

Conference Presentation

Citation Download Citation

Denis Andrienko, Carl Poelking, and Pascal Kordt "Design rules for organic D-A heterojunctions: pathway for charge splitting (Conference Presentation)", Proc. SPIE 9923, Physical Chemistry of Interfaces and Nanomaterials XV, 992305 (11 November 2016); https://doi.org/10.1117/12.2236312

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