Regensburg 2019 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 45: HL Posters III
HL 45.10: Poster
Donnerstag, 4. April 2019, 18:30–21:00, Poster E
Perovskite-on-Quantum Dot solar cells — •Miguel Albaladejo-Siguan1,2, David Backer-Koch1,2, and Yana Vaynzof1,2 — 1Kirchhoff-Institut für Physik, Heidelberg — 2Centre for Advanced Materials, Heidelberg
Nanometer-sized quantum dots offer the possibility to build flexible, low-cost, thin film photovoltaic devices. In recent years, device engineering and optimized architectures have contributed to a fast rise in performance, reaching a record power conversion efficiency of 13.4 %. At the same time, pervoskite based solar cells are showing promising results in device performance with open circuit voltage values surpassing 1.2 V, which motivates the option of combining both materials in one solar cell. In this study we focus on the growth of perovskite crystals on the surface of colloidal lead sulfide quantum dots by performing a ligand exchange in a solution containing the perovskite precursor, followed by thin film deposition and annealing. A succesful incorporation of the perovskite shell could be measured as well as an improved passivation and higher interdot coupling, which translates into an enhanced open circuit voltage.