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Transport Resistance Dominates the Fill Factor Losses in Record Organic Solar Cells by Wang, Chen; MacKenzie, Roderick C. I.; Würfel, Uli; Neher, Dieter; Kirchartz, Thomas; Deibel, Carsten; Saladina, Maria is a scholarly article available to read on EtoBox.

What is Transport Resistance Dominates the Fill Factor Losses in Record Organic Solar Cells about?

Organic photovoltaics are a promising solar cell technology well-suited to mass production using roll-to-roll processes. The efficiency of lab-scale solar cells has exceeded 20% and considerable attention is currently being given to understanding and minimising the remaining loss mechanisms preventing higher efficiencies. While recent efficiency improvements are partly owed to reducing non-radiative recombination losses at open-circuit, the low fill factor due to a significant transport resistance is becoming the Achilles heel of organic photovoltaics. The term transport resistance refers to a voltage and light intensity dependent charge collection loss in low-mobility materials. In this Perspective, we demonstrate that even the highest efficiency organic solar cells reported to-date have significant performance losses that can be attributed to transport resistance and that lead to high fill factor losses. We provide a closer look at the transport resistance and the material properties influencing it. We describe how to experimentally characterise and quantify the transport resistance by providing easy to follow instructions. Furthermore, the causes and theory behind transport resi

Author

Wang, Chen; MacKenzie, Roderick C. I.; Würfel, Uli; Neher, Dieter; Kirchartz, Thomas; Deibel, Carsten; Saladina, Maria

Published

2024

Language

EN