@article {43982,
	title = {Efficient exciton to dopant energy transfer in Mn2+-Doped (C<inf>4</inf>H<inf>9</inf>NH<inf>3</inf>)<inf>2</inf>PbBr<inf>4</inf> two-dimensional (2D) layered perovskites},
	journal = {Chemistry of Materials},
	volume = {29},
	year = {2017},
	month = {SEP},
	pages = {7816-7825},
	type = {Journal Article},
	abstract = {Three-dimensional ABX3 perovskite material has attracted immense interest and applications in optoelectronic devices, because of their enabling properties. Recently, Mn2+ doping directly into APbCl3-type three-dimensional (3D) nanocrystals, manifesting host-to-dopant energy transfer, have been reported for LED display applications. Strongly bound excitons in the doped system can enhance the dopant-carrier exchange interactions, leading to efficient energy transfer. Here, we report the simple and scalable synthesis of Mn2+-doped (C4H9NH3)2PbBr4 two-dimensional (2D) layered perovskites. The Mn2+-doped 2D perovskite shows enhanced energy transfer efficiency from the strongly bound excitons of the host material to the d electrons of Mn2+ ions, resulting in intense orange-yellow emission, which is due to spin-forbidden internal transition (4T1 {\textrightarrow} 6A1) with the highest quantum yield (Mn2+) of 37\%. Because of this high quantum yield, stability in ambient atmosphere, and simplicity and scalability of the synthetic procedure, Mn2+-doped 2D perovskites could be beneficial as color-converting phosphor material and as energy down-shift coating for perovskite solar cells. The newly developed Mn2+-doped 2D perovskites can be a suitable material to tune dopant-exciton exchange interactions to further explore their magneto-optoelectronic properties.},
	keywords = {Doping (additives), Energy Efficiency, Energy Transfer, Exchange interactions, Excitons, Light Emitting Diodes},
	issn = {0897-4756},
	doi = {10.1021/acs.chemmater.7b02429},
	author = {Biswas, A.},
	editor = {Bakthavatsalam, R.}
}
