Proceedings of Perovskite Thin Film Photovoltaics (ABXPV17)
Publication date: 18th December 2016
Organic inorganic (hybrid) lead halide perovskites are interesting materials for photovoltaic applications, low-threshold lasers and light-emitting diodes (LEDs). Their application in LEDs requires a precise control over their morphology, since this determines their optical and electronic properties. In particular, materials with high photoluminescent quantum yield (PLQY) are desirable for the preparation of efficient LEDs. One of the most suitable strategies for controlling the morphology and enhancing the photoluminescence of perovskites is the preparation of nanostructured materials. The recent breakthroughs in the PLQY of narrow-band emitting perovskite nanoparticles (NPs) (full width at half-maximum, FWHM ∼20 nm) make these materials promising candidates for light-emitting applications.
In this work, methylammonium lead bromide nanoparticles are synthetized with a new ligand (11-aminoundecanoic acid hydrobromide) by a non-template method. Upon dispersion in toluene they show a remarkable photoluminescence quantum yield of 80%. In addition, the bifunctional ligand allows to anchor the nanoparticles on a variety of conducting and semiconducting surfaces, showing bright photoluminescence films with a quantum yield exceeding 50%. This opens a path for the simple and inexpensive preparation of multilayer light-emitting devices.
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