Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 90: Poster III
HL 90.13: Poster
Donnerstag, 10. März 2016, 16:00–19:00, Poster A
Lasing in lead iodide perovskite thin films on distributed feedback gratings — •Mareike Stulz1,2, Philipp Brenner1, Aina Quintilla1, Holger Röhm1, Ian Howard3, Alexander Colsmann1, Heinz Kalt2, and Uli Lemmer1 — 1Light Technology Institute, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — 2Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — 3Institute of Microstructure Technology, Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
Hybrid organic-inorganic perovskites have recently shown great potential as gain material for laser devices with the advantages of solution processability, wavelength tunability and high stability [1]. Furthermore, the low trap densities and high charge carrier mobilities might enable electrically pumped gain in this material.
We prepared thin films of Methylammonium lead iodide (CH3NH3PbI3) on corrugated substrates by solution-based spin-coating or doctor blading. Matching the film thickness and grating period enabled optically pumped distributed feedback single mode lasing at room temperature. Additionally, the modal net gain of the perovskite thin films was measured with the variable stripe length method.
[1] Xing et al. Nature Materials 13, 476-480, 2014.