On the Relation between the Open‐Circuit Voltage and Quasi‐Fermi Level Splitting in Efficient Perovskite Solar Cells
University of Potsdam · Helmholtz-Zentrum Berlin für Materialien und Energie · +1 more institution
Abstract
Abstract Today's perovskite solar cells (PSCs) are limited mainly by their open‐circuit voltage ( V OC ) due to nonradiative recombination. Therefore, a comprehensive understanding of the relevant recombination pathways is needed. Here, intensity‐dependent measurements of the quasi‐Fermi level splitting (QFLS) and of the V OC on the very same devices, including pin‐type PSCs with efficiencies above 20%, are performed. It is found that the QFLS in the perovskite lies significantly below its radiative limit for all intensities but also that the V OC is generally lower than the QFLS, violating one main assumption of the Shockley‐Queisser theory. This has far‐reaching implications for the applicability of some…
Citation impact
- FWCI
- 22.64
- Percentile
- 100%
- References
- 40
Authors
7- PCPietro Caprioglio
University of Potsdam, Helmholtz-Zentrum Berlin für Materialien und Energie
- MSMartin Stolterfoht
University of Potsdam
- CMChristian M. Wolff
University of Potsdam
- TUThomas Unold
Helmholtz-Zentrum Berlin für Materialien und Energie
- BRB. Rech
Helmholtz-Zentrum Berlin für Materialien und Energie, Technische Universität Berlin
Topics & keywords
- Materials science
- Perovskite (structure)
- Recombination
- Open-circuit voltage
- Diffusion
- Saturation (graph theory)
- Atomic physics
- Fermi level
- Affordable and clean energy