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HL: Fachverband Halbleiterphysik

HL 28: Poster: Fundamentals of Perovskite Photovoltaics (joint session CPP, DS, HL)

HL 28.7: Poster

Montag, 20. März 2017, 18:30–21:00, P1A

Polarisation resolved optical spectroscopy of single CsPbI3 nanocrystals — •Mirko Goldmann^1,2, Daniela Täuber^1,5, Juanzi Shi¹, Junsheng Chen³, Maria E. Messing^4,5, Kaibo Zheng³, and Ivan G. Scheblykin^1,5 — ¹Single molecule spectroscopy group, Lund University, Sweden — ²TU Ilmenau, Germany — ³2D spectroscopy group, Lund University, Sweden — ⁴Solid State Physics, Lund University, Sweden — ⁵NanoLund, Lund University, Sweden

Semiconducting metal halide nanocrystals are promising candidates for optoelectronic devices due to their high quantum yield and solution processability. Fully inorganic CsPbI₃ is more stable than CH₃NH₃PbI₃. Polarization resolved optical spectroscopy of single CsPbI₃ nanocrystals probes their cubic crystal structure and sperical shapes. Photoluminescence emission from freshly synthesized CsPbI₃ nanocrystals was found to be almost unpolarized. Several weeks old nanocrystals showed an increased appearance of polarized photoluminescence in agreement with the observation of elongated crystal shapes by TEM.