Nonradiative recombination in perovskite solar cells
- Perovskite solar cells combine high carrier mobilities with long carrier lifetimes and high radiative efficiencies. Despite this, full devices suffer from significant nonradiative recombination losses, limiting their VOC to values well below the Shockley–Queisser limit. Here, recent advances in understanding nonradiative recombination in perovskite solar cells from picoseconds to steady state are presented, with an emphasis on the interfaces between the perovskite absorber and the charge transport layers. Quantification of the quasi‐Fermi level splitting in perovskite films with and without attached transport layers allows to identify the origin of nonradiative recombination, and to explain the VOC of operational devices. These measurements prove that in state‐of‐the‐art solar cells, nonradiative recombination at the interfaces between the perovskite and the transport layers is more important than processes in the bulk or at grain boundaries. Optical pump‐probe techniques give complementary access to the interfacial recombinationPerovskite solar cells combine high carrier mobilities with long carrier lifetimes and high radiative efficiencies. Despite this, full devices suffer from significant nonradiative recombination losses, limiting their VOC to values well below the Shockley–Queisser limit. Here, recent advances in understanding nonradiative recombination in perovskite solar cells from picoseconds to steady state are presented, with an emphasis on the interfaces between the perovskite absorber and the charge transport layers. Quantification of the quasi‐Fermi level splitting in perovskite films with and without attached transport layers allows to identify the origin of nonradiative recombination, and to explain the VOC of operational devices. These measurements prove that in state‐of‐the‐art solar cells, nonradiative recombination at the interfaces between the perovskite and the transport layers is more important than processes in the bulk or at grain boundaries. Optical pump‐probe techniques give complementary access to the interfacial recombination pathways and provide quantitative information on transfer rates and recombination velocities. Promising optimization strategies are also highlighted, in particular in view of the role of energy level alignment and the importance of surface passivation. Recent record perovskite solar cells with low nonradiative losses are presented where interfacial recombination is effectively overcome—paving the way to the thermodynamic efficiency limit.…
Verfasserangaben: | Christian Michael WolffORCiDGND, Pietro CaprioglioORCiDGND, Martin StolterfohtORCiD, Dieter NeherORCiDGND |
---|---|
URN: | urn:nbn:de:kobv:517-opus4-437626 |
DOI: | https://doi.org/10.25932/publishup-43762 |
ISSN: | 1866-8372 |
Titel des übergeordneten Werks (Deutsch): | Postprints der Universität Potsdam Mathematisch-Naturwissenschaftliche Reihe |
Untertitel (Englisch): | the role of interfaces |
Schriftenreihe (Bandnummer): | Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (772) |
Publikationstyp: | Postprint |
Sprache: | Englisch |
Datum der Erstveröffentlichung: | 22.11.2019 |
Erscheinungsjahr: | 2019 |
Veröffentlichende Institution: | Universität Potsdam |
Datum der Freischaltung: | 22.11.2019 |
Freies Schlagwort / Tag: | interfacial recombination; open‐circuit voltage; perovskite solar cells; photoluminescence |
Ausgabe: | 772 |
Seitenanzahl: | 20 |
Quelle: | Advanced Materials (2019) Art. 1902762 DOI: 10.1002/adma.201902762 |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
6 Technik, Medizin, angewandte Wissenschaften / 66 Chemische Verfahrenstechnik / 660 Chemische Verfahrenstechnik | |
Peer Review: | Referiert |
Publikationsweg: | Open Access |
Fördermittelquelle: | DEAL Wiley |
Lizenz (Deutsch): | CC-BY - Namensnennung 4.0 International |