Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.

Issue 16, 2016
Previous Article Next Article

Achieving a high fill factor for organic solar cells

Author affiliations


Organic photovoltaics (OPVs) have developed rapidly in the last decades due to their potential for providing cost-efficient, low-energy consumption, and environmentally friendly renewable energy sources. Some research reports have focused on the device physics of organic photovoltaics that governs open circuit voltage (Voc) and short circuit current (Jsc) to improve their performance. In this review, we focus on the third parameter, fill factor (FF), that is equally important in determining the power conversion efficiency. We discuss the mathematical calculation of the FF and the relationship between the FF and equivalent circuit model elements, namely, shunt resistance, series resistance, and diode ideal factor. In order to provide a strategy toward a high FF for OPVs from the viewpoints of device design and material synthesis, we review important device features and BHJ features that have a large impact on the device FF, including preventing shorting, buffer layer design, domain size or purity, gradated BHJ structures, π–π stacking distance or direction, etc. We hope this article can provide a comprehensive insight into elements controlling the FF of OPVs and give a valuable direction for better device and material design.

Graphical abstract: Achieving a high fill factor for organic solar cells

Back to tab navigation

Article information

06 Jan 2016
09 Mar 2016
First published
10 Mar 2016

J. Mater. Chem. A, 2016,4, 5784-5801
Article type
Review Article

Achieving a high fill factor for organic solar cells

M. Jao, H. Liao and W. Su, J. Mater. Chem. A, 2016, 4, 5784
DOI: 10.1039/C6TA00126B

Social activity

Search articles by author