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HL: Fachverband Halbleiterphysik

HL 104: Organic electronics and photovoltaics II (organized by DS)

HL 104.1: Vortrag

Donnerstag, 3. April 2014, 17:45–18:00, CHE 91

The role of residual additives on the stability of polymer blend materials for organic photovoltaic applications. — •Aurélien Tournebize^1,2, Agnès Rivaton², Heiko Peisert¹, and Thomas Chassé¹ — ¹Institute of Physical and Theoretical Chemistry, Tübingen, Germany — ²Institut de Chimie de Clermont-Ferrand, France

Processing additives for improved the morphology of the bulk heterojunction (BHJ) materials used in organic solar cells (OSCs) is now very popular. Thus, by optimizing the donor and acceptor nano domains, the efficiency of OSCs devices could be significantly increased. [1] The impact of those additives on the performances has been widely explored recently but nothing in terms of stability. And yet, a part of the additives stays trapped in the thin film [2] and could participate in the complex photodegradation of the polymer blend materials.

In the present work, we have investigated the impact of residual additives on the polymer blend photostability. By using essentially spectroscopic technics, we have observed an acceleration of the polymer blend photodegradation in presence of additives. In this context, the use of new additives providing a better morphology and by the way a better stability was also explored.

[1] J.K. Lee, W.L. Ma, C.J. Brabec, J. Yuen, J.S. Moon, J.Y. Kim, K. Lee, G.C. Bazan, and A.J. Heeger JACS. 2008, 130, 3619-3623 [2] L. Ye, Y. Jing, X. Guo, H. Sun, S. Zhang, M. Zhang, L. Huo, and J. Hou J. Phys. Chem. C 2013, 117, 14920-14928