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 27, 2014
Previous Article Next Article

Optimization of absorption bands of dye-sensitized and perovskite tandem solar cells based on loss-in-potential values

Author affiliations

Abstract

A numerical study of optimal bandgaps of light absorbers in tandem solar cell configurations is presented with the main focus on dye-sensitized solar cells (DSSCs) and perovskite solar cells (PSCs). The limits in efficiency and the expected improvements of tandem structures are investigated as a function of total loss-in-potential (VL), incident photon to current efficiency (IPCE) and fill factor (FF) of individual components. It is shown that the optimal absorption onsets are significantly smaller than those derived for multi-junction devices. For example, for double-cell devices the onsets are at around 660 nm and 930 nm for DSSCs with iodide based electrolytes and at around 720 nm and 1100 nm for both DSSCs with cobalt based electrolytes and PSCs. Such configurations can increase the total sunlight conversion efficiency by about 35% in comparison to single-cell devices of the same VL, IPCE and FF. The relevance of such studies for tandem n–p DSSCs and for a proposed new configuration for PSCs is discussed. In particular, it is shown that maximum total losses of 1.7 V for DSSCs and 1.4 V for tandem PSCs are necessary to give any efficiency improvement with respect to the single bandgap device. This means, for example, a tandem n–p DSSC with TiO2 and NiO porous electrodes will hardly work better than the champion single DSSC. A source code of the program used for calculations is also provided.

Graphical abstract: Optimization of absorption bands of dye-sensitized and perovskite tandem solar cells based on loss-in-potential values

Back to tab navigation

Supplementary files

Article information


Submitted
05 May 2014
Accepted
22 May 2014
First published
22 May 2014

Phys. Chem. Chem. Phys., 2014,16, 14116-14126
Article type
Paper
Author version available

Optimization of absorption bands of dye-sensitized and perovskite tandem solar cells based on loss-in-potential values

J. Sobuś and M. Ziółek, Phys. Chem. Chem. Phys., 2014, 16, 14116
DOI: 10.1039/C4CP01937G

Social activity

Search articles by author

Spotlight

Advertisements