High-Performance Color-Tunable Perovskite Light Emitting Devices through Structural Modulation from Bulk to Layered Film.
basic_science · Level V
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- Record sourced from PubMed, PMID 28000969.
- Also identified by DOI 10.1002/adma.201603157.
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Abstract
Adding 2-phenoxyethylamine (POEA) into a CH<sub>3</sub> NH<sub>3</sub> PbBr<sub>3</sub> precursor solution can modulate the organic-inorganic hybrid perovskite structure from bulk to layered, with a photoluminescence and electroluminescence shift from green to blue. Meanwhile, POEA can passivate the CH<sub>3</sub> NH<sub>3</sub> PbBr<sub>3</sub> surface and help to obtain a pure CH<sub>3</sub> NH<sub>3</sub> PbBr<sub>3</sub> phase, leading to an improvement of the external quantum efficiency to nearly 3% in CH<sub>3</sub> NH<sub>3</sub> PbBr<sub>3</sub> LED.