Loss mechanisms in organic solar cells based on perylene diimide acceptors studied by time-resolved photoluminescence

Marina Gerhard; Dominik Gehrig; Ian A. Howard; Andreas P. Arndt; Mühenad Bilal; Arash Rahimi-Iman; Uli Lemmer; Frédéric Laquai; Martin Koch

doi:10.1117/12.2227672

27 April 2016 Loss mechanisms in organic solar cells based on perylene diimide acceptors studied by time-resolved photoluminescence

Marina Gerhard, Dominik Gehrig, Ian A. Howard, Andreas P. Arndt, Mühenad Bilal, Arash Rahimi-Iman, Uli Lemmer, Frédéric Laquai, Martin Koch

Author Affiliations +

Proceedings Volume 9895, Organic Photonics VII; 98950H (2016) https://doi.org/10.1117/12.2227672
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

In organic photovoltaics (OPV), perylene diimide (PDI) acceptor materials are promising candidates to replace the commonly used, but more expensive fullerene derivatives. The use of alternative acceptor materials however implies new design guidelines for OPV devices. It is therefore important to understand the underlying photophysical processes, which either lead to charge generation or geminate recombination. In this contribution, we investigate radiative losses in a series of OPV materials based on two polymers, P3HT and PTB7, respectively, which were blended with different PDI derivatives. Our time-resolved photoluminescence measurements (TRPL) allow us to identify different loss mechanisms by the decay characteristics of several excitonic species. In particular, we find evidence for unfavorable morphologies in terms of large-scale pure domains, inhibited exciton transport and incomplete charge transfer. Furthermore, in one of the P3HT-blends, an interfacial emissive charge transfer (CT) state with strong trapping character is identified.

Citation Download Citation

Marina Gerhard, Dominik Gehrig, Ian A. Howard, Andreas P. Arndt, Mühenad Bilal, Arash Rahimi-Iman, Uli Lemmer, Frédéric Laquai, and Martin Koch "Loss mechanisms in organic solar cells based on perylene diimide acceptors studied by time-resolved photoluminescence", Proc. SPIE 9895, Organic Photonics VII, 98950H (27 April 2016); https://doi.org/10.1117/12.2227672

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