Organometallic halide perovskites CH3NH3BX3 (B= Pb, Sn, Ge; X = I, Br, Cl) have become one of the most promising semiconductors for solar cell applications, reaching power conversion efficiencies beyond 20%. Improving our ability to harness the full potential of organometal halide perovskites requires the development of more reliable synthesis routines of well defined, reproducible and defect free reference systems allowing to study the fundamental photo-physical processes.
In this study we present size and band gap engineering for organo-lead perovskites crystallites with various shapes and sizes ranging from the 5 nm regime all the way to 1 cm. Colloidal nano-crystals, micro-crystlline particles as well as single crystals are demonstrated with excellent purity and control in shape and size are demonstrated. The structural, optical and photo-physical properties of these reference materials are investigated and analyzed as function of their size and shape.
Levgen Levchuk, Florian Hoegl, Marco Brandl, Andres Osvet, Rainer Hock, Patrick Herre, Wolfgang Wolfgang, Peter Schweizer, Erdmann Spiecker, Miroslaw Batentschuk, and Christoph Brabec, "Organometallic perovskites for optoelectronic applications
(Conference Presentation)," Proc. SPIE 9919, Nanophotonic Materials XIII, 99190E (Presented at SPIE Nanoscience + Engineering: August 30, 2016; Published: 7 November 2016); https://doi.org/10.1117/12.2237101.5159519609001.
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