Vashishtha, Parth, Veldhuis, Sjoerd A., Dintakurti, Sai S. H., Kelly, Nicole L., Griffith, Benjamin E., Brown, Alasdair A. M., Suhail Ansari, Mohammed, Bruno, Annalisa, Mathews, Nripan, Fang, Yanan, Mhaisalkar, Subodh G. and Hanna, John V. (2020) Data for Investigating the structure-function relationship in triple cation perovskite nanocrystals for light-emitting diode applications. [Dataset]

	Plain Text (Readme file) README.docx - Published Version Available under License Creative Commons Attribution 4.0. Download (16Kb)
	Archive (ZIP) (Zip Archive) Data Archive.zip - Published Version Available under License Creative Commons Attribution 4.0. Download (1481Mb)

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Abstract

Organic metal halide perovskite nanocrystals are promising candidates for light-emitting diodes due to their narrow emission bandwidth, high photoluminescence quantum yield (PLQY), and color tunability. Nevertheless, these systems suffer from thermal instability, phase impurities, and a sensitivity to processing techniques. This study reports the first synthesis of novel Cs-containing triple cation perovskite nanocrystals with nominal stoichiometry Csx(MA0.17FA0.83)1−xPbBr3 (x = 0–0.15). The effect of Cs+ cation incorporation is thoroughly investigated using diffraction, microscopy and solid state MAS NMR techniques. The solid state 133Cs MAS NMR results reveals the distribution of the Cs+ cations is highly concentration and particle size dependent, with maximized surface/subsurface Cs+ concentrations being achieved with the smaller 5 mol% Cs system. These characteristics directly correlate improved surface passivation and environmental stability of the triple cation system. These triple cation nanocrystals exhibit a maximum photoluminescence quantum yield of ∼93% which upon translation to nanocrystalline LED devices delivers a maximum EQE of 7.4% (30 cd A−1) corresponding to a power efficiency of 34.87 lm W−1. This performance represents a marked improvement compared to CsPbBr3 nanocrystals (PL quantum yield ∼50%; maximum EQE of 2.5% (7.2 cd A−1)) fabricated under similar conditions.

Item Type:	Dataset
Subjects:	Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Type of Data:	Experimental data
Library of Congress Subject Headings (LCSH):	Nanocrystals -- Synthesis, Light emitting diodes -- Materials, Perovskite materials
Publisher:	University of Warwick, Department of Physics
Official Date:	3 August 2020
Dates:	Date Event 3 August 2020 Published 26 April 2020 Submitted 10 March 2020 Created
Status:	Not Peer Reviewed
Publication Status:	Published
Media of Output (format):	.997, .998, .999, .acq, .array, .ased, .dat, .info, .mp3, .opj, .opju, .par, .protocol, .temp, .tif, .txt, .xlsx, .xy
Access rights to Published version:	Open Access (Creative Commons)
Copyright Holders:	University of Warwick
Description:	Data record consists of a zip archive, organised into sub-folders, and an accompanying readme file. Sub-folders are named and organised according to the experiments they contain. The sub-folders are as follows: 1. LED EQE Data (Origin and Excel ASCII data) 2. LED Stability (Origin ASCII data) 3. NMR (8 subfolders [format: XX_Date of collection_YY], organised according to the nucleus [XX] and sample/experiment [YY]) 4. Optical Properties (Origin ASCII data, sample photo, and 3 subfolders containing raw data files) 5. XRD (Origin ASCII data and .xy files) Further information on specific data files can be found in the accompanying readme file.
Date of first compliant deposit:	7 September 2020
Date of first compliant Open Access:	7 September 2020
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID M408070000 Nanyang Technological University http://dx.doi.org/10.13039/501100001475 NRF-CRP14-2014-03 National Research Foundation Singapore http://dx.doi.org/10.13039/501100001381 EP/L015307/1 [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266 EP/M028186/1 [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266 EP/K024418/1 [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266 UNSPECIFIED University of Warwick http://dx.doi.org/10.13039/501100000741 UNSPECIFIED Advantage West Midlands http://dx.doi.org/10.13039/100014381 UNSPECIFIED [ERDF] European Regional Development Fund http://dx.doi.org/10.13039/501100008530
Related URLs:	Other Related item in WRAP
Contributors:	Contribution Name Contributor ID Depositor Hanna, John V. 28389

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