TY - JOUR A1 - Tockhorn, Philipp A1 - Sutter, Johannes A1 - Cruz Bournazou, Alexandros A1 - Wagner, Philipp A1 - Jäger, Klaus A1 - Yoo, Danbi A1 - Lang, Felix A1 - Grischek, Max A1 - Li, Bor A1 - Li, Jinzhao A1 - Shargaieva, Oleksandra A1 - Unger, Eva A1 - Al-Ashouri, Amran A1 - Köhnen, Eike A1 - Stolterfoht, Martin A1 - Neher, Dieter A1 - Schlatmann, Rutger A1 - Rech, Bernd A1 - Stannowski, Bernd A1 - Albrecht, Steve A1 - Becker, Christiane T1 - Nano-optical designs for high-efficiency monolithic perovskite-silicon tandem solar cells JF - Nature nanotechnology N2 - Designing gentle sinusoidal nanotextures enables the realization of high-efficiency perovskite-silicon solar cells
Perovskite-silicon tandem solar cells offer the possibility of overcoming the power conversion efficiency limit of conventional silicon solar cells. Various textured tandem devices have been presented aiming at improved optical performance, but optimizing film growth on surface-textured wafers remains challenging. Here we present perovskite-silicon tandem solar cells with periodic nanotextures that offer various advantages without compromising the material quality of solution-processed perovskite layers. We show a reduction in reflection losses in comparison to planar tandems, with the new devices being less sensitive to deviations from optimum layer thicknesses. The nanotextures also enable a greatly increased fabrication yield from 50% to 95%. Moreover, the open-circuit voltage is improved by 15 mV due to the enhanced optoelectronic properties of the perovskite top cell. Our optically advanced rear reflector with a dielectric buffer layer results in reduced parasitic absorption at near-infrared wavelengths. As a result, we demonstrate a certified power conversion efficiency of 29.80%. Y1 - 2022 U6 - https://doi.org/10.1038/s41565-022-01228-8 SN - 1748-3387 SN - 1748-3395 VL - 17 IS - 11 SP - 1214 EP - 1221 PB - Nature Publishing Group CY - London [u.a.] ER - TY - JOUR A1 - Söll, Änne A1 - Köstler, Andreas A1 - Krause, Regina A1 - Ludwig, Joachim A1 - Pohlenz, Philipp A1 - Rößler, Dirk A1 - Kirf, Marcel A1 - Klein, Armin A1 - Wagner, Nelli A1 - Angelow, Jürgen T1 - Portal = Pläne vorgelegt: Maßnahmen zur Studienreform BT - Das Potsdamer Universitätsmagazin N2 - Aus dem Inhalt: - Pläne vorgelegt: Maßnahmen zur Studienreform - Fische lügen beim Sex - Käfersammlerin des 21. Jahrhunderts T3 - Portal: Das Potsdamer Universitätsmagazin - 10-12/2008 Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-440162 SN - 1618-6893 IS - 10-12/2008 ER - TY - JOUR A1 - Neyer, Franz A1 - Boden, Michael A1 - Reiche, Kathenna A1 - Nowitz, Alex A1 - Ravic Strubel, Antje A1 - Lachmann, Torsten A1 - Palent, Andrea A1 - Schubert, Mike A1 - Heide, Judith A1 - Rowe, Philipp A1 - Peitzker, Tania A1 - Wicke, Markus A1 - Neitzke, Kai A1 - Wagner, Nelli T1 - Portal alumni T2 - Das Ehemaligen-Magazin der Universität Potsdam N2 - Liebe Leserin, lieber Leser, Castingshows schießen in letzter Zeit wie Pilze aus dem Boden. Ein Mangel an Bewerbern für diese Formate scheint nicht zu bestehen. Reich und berühmt sein wie Leonardo DiCaprio, der angeblich sogar mitten im brasilianischen Regenwald von einem Indianer erkannt wurde das ist das Ziel. Die erhoffte Prominenz ist bei Kandidaten dieser Shows oft Selbstzweck. Aber es gibt natürlich auch noch Menschen, die ihre Bekanntheit ihrer künstlerischen Passion, ihrem politischen Engagement oder ihren sportlichen Leistungen verdanken. Mitunter ist es diesen Menschen sogar eher lästig als angenehm, wenn sie im Rampenlicht stehen. Nach solchen Menschen aus dem Kreise unserer Ehemaligen haben wir gesucht und sind fündig geworden. Ihren Werdegang können Sie in unserem Titelthema nachlesen. Wie Prominenz und Persönlichkeit sich gegenseitig beeinflussen, warum Menschen überhaupt im Licht der Öffentlichkeit stehen wollen und wie man mit den negativen Seiten der eigenen Bekanntheit umgehen kann, erläutert Persönlichkeitspsychologe Prof. Dr. Franz Neyer in einem einführenden Artikel. Unter der Rubrik "alumni insight" lesen Sie beispielsweise, wie man in Russland eine Firma gründet oder vor welchen Herausforderungen ein Deutschlehrer in Usbekistan steht. Falls Sie sich gerade bewerben und noch Tipps zum Verfassen Ihres Lebenslaufs suchen, könnte ein Blick in die Rubrik "wegweiser" hilfreich sein. N2 - Dear readers, in recent years, casting shows have been springing up like mushrooms. Candidates for shows of this format do not seem to be lacking at all. To be rich and famous like Leonardo DiCaprio-who was allegedly even recognised by a member of an indigenous people in the Brazilian rainforest-this is the goal. The prominence for which candidates hope to attain through these shows is often an end in itse!f Nonetheless, there are also other people who become well-known through their artistic passion, their political activities, or their success in sports. For these people, it is actually sometimes more annoying than enjoyable to stand in the limelight. We looked for, and found, prominent people amongst our alumni. You can read about their paths in life in this issue's main section. How prominence and personality injluence one-another, why people want to stand in the firnelight at all, and how one can handle the negative sides of prominence, all of this is discussed in an introductory article by the psychologist of personality, Professor Dr. Franz Neyer. ln the section "alumni insight," you can read for example about how one establishes a business in Russia, or about what challenges a German teacher faces in Uzbekistan. ln case you are currently applyingfor jobs and are looking for tips on how to improve your curriculum vitae, a look at this issue's "wegweiser" section might be helpful. We wish you a pleasant read and Iook forward to your comments. T3 - Portal alumni : das Ehemaligen-Magazin der Universität Potsdam - 6/2008 Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-482134 VL - 2008 IS - 6 ER - TY - JOUR A1 - Lang, Felix A1 - Köhnen, Eike A1 - Warby, Jonathan A1 - Xu, Ke A1 - Grischek, Max A1 - Wagner, Philipp A1 - Neher, Dieter A1 - Korte, Lars A1 - Albrecht, Steve A1 - Stolterfoht, Martin T1 - Revealing fundamental efficiency limits of monolithic perovskite/silicon tandem photovoltaics through subcell characterization JF - ACS Energy Letters N2 - Perovskite/silicon tandem photovoltaics (PVs) promise to accelerate the decarbonization of our energy systems. Here, we present a thorough subcell diagnosis methodology to reveal deep insights into the practical efficiency limitations of state-of-the-art perovskite/silicon tandem PVs. Our subcell selective intensity-dependent photoluminescence (PL) and injection-dependent electroluminescence (EL) measurements allow independent assessment of pseudo-V-OC and power conversion efficiencies (PCEs) for both subcells. We reveal identical metrics from PL and EL, which implies well-aligned energy levels throughout the entire cell. Relatively large ideality factors and insufficient charge extraction, however, cause each a fill factor penalty of about 6% (absolute). Using partial device stacks, we then identify significant losses in standard perovskite subcells due to bulk and interfacial recombination. Lastly, we present strategies to minimize these losses using triple halide (CsFAPb(IBrCI)(3)) based perovskites. Our results give helpful feedback for device development and lay the foundation toward advanced perovskite/silicon tandem PVs capable of exceeding 33% PCE. Y1 - 2021 U6 - https://doi.org/10.1021/acsenergylett.1c01783 SN - 2380-8195 VL - 6 IS - 11 SP - 3982 EP - 3991 PB - American Chemical Society CY - Washington ER -