In-Operando Study of the Effects of Solvent Additives on the Stability of Organic Solar Cells Based on PTB7-Th:PC 71 BM

Dan Yang, Franziska C. Löhrer, Volker Körstgens, Armin Schreiber, Sigrid Bernstorff, Jillian M. Buriak, Peter Müller-Buschbaum

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

64 Zitate (Scopus)

Abstract

Degradation of organic solar cells is among the fundamental problems that hinder their successful breakthrough. We probe in-operando the degradation behavior of organic solar cells based on the high-efficiency low-bandgap benzodithiophene copolymer PTB7-Th and [6,6]-phenyl-C71-butyric acid methyl ester (PC 71 BM). The influence of the solvent additives 1,8-diiodooctane and o-chlorobenzaldehyde on the degradation mechanism is studied with in situ grazing incidence small-angle X-ray scattering during operation. Changes in the IV characteristics are correlated for the first time in situ with changes in the morphology showing that the use of a solvent additive causes a change in device degradation.

OriginalspracheEnglisch
Seiten (von - bis)464-470
Seitenumfang7
FachzeitschriftACS Energy Letters
Jahrgang4
Ausgabenummer2
DOIs
PublikationsstatusVeröffentlicht - 8 Feb. 2019

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