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![]() KRESSDORF, Birte, MEYER, Tobias, BELENCHUK, Alexandr, SHAPOVAL, Oleg M., TEN, Brink, M., MELLES, S., HOFFMANN, Joerg, ROSS, Ulrich, MOSHNYAGA, Vasily T., SEIBT, Michael, BLOCHL, Peter E., JOOSS, Ch H.. Room-Temperature Hot-Polaron Photovoltaics in the Charge-Ordered State of a Layered Perovskite Oxide Heterojunction. In: Physical Review Applied, 2020, vol. 14, p. 0. ISSN 2331-7019. DOI: https://doi.org/10.1103/PhysRevApplied.14.054006 |
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Physical Review Applied | ||||||
Volumul 14 / 2020 / ISSN 2331-7019 | ||||||
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DOI:https://doi.org/10.1103/PhysRevApplied.14.054006 | ||||||
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Harvesting of solar energy by hot carriers from optically induced intraband transitions offers new perspectives for photovoltaic energy conversion. Clearly, mechanisms slowing down hot-carrier thermalization constitute a fundamental core of such pathways of third-generation photovoltaics. The intriguing concept of hot polarons stabilized by long-range phonon correlations in charge-ordered strongly correlated three-dimensional metal-oxide perovskite films has emerged and been demonstrated for Pr0.7Ca0.3MnO3 at low temperature. In this work, a tailored approach to extending such processes to room temperature is presented. It consists of a specially designed epitaxial growth of two-dimensional Ruddlesden-Popper Pr0.5Ca1.5MnO4 films on Nb:SrTiO3 with a charge-ordering transition at TCO ∼320 K. This opens the route to a different phonon-bottleneck strategy of slowing down carrier relaxation by strong coupling of electrons to cooperative lattice modes. |
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Cuvinte-cheie energy conversion, Heterojunctions, Hot carriers, Manganese compounds, Metals, Niobium compounds, perovskite, Perovskite solar cells, phonons, Polarons, Praseodymium compounds, solar energy, Strontium titanates, temperature |
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