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Title: Crown Ethers Enable Room Temperature Synthesized CsPbBr3 Quantum Dots for Light-Emitting Diodes
Authors: Veldhuis, Sjoerd Antonius
Ng, Yan Fong
Ahmad, Riyas
Bruno, Annalisa
Jamaludin, Nur Fadilah
Damodaran, Bahulayan
Mathews, Nripan
Mhaisalkar, Subodh Gautam
Keywords: Quantum Dots
Crown Ethers
Issue Date: 2018
Source: Veldhuis, S. A., Ng, Y. F., Ahmad, R., Bruno, A., Jamaludin, N. F., Damodaran, B., et al. (2018). Crown Ethers Enable Room Temperature Synthesized CsPbBr3 Quantum Dots for Light-Emitting Diodes. ACS Energy Letters, 3(3), 526-531.
Series/Report no.: ACS Energy Letters
Abstract: The synthesis of all-inorganic cesium lead halide perovskite quantum dots (QDs) typically requires high temperatures, stringent conditions, large quantities of surface ligands, and judicious purification steps to overcome ligand-induced charge injection barriers in optoelectronic devices. Low-temperature syntheses generally require lower ligand concentrations, but are severely limited by the low solubility of the Cs precursor. We describe an innovative and general approach under ambient conditions to overcome these solubility limitations, by employing crown ethers. The crown ethers facilitate complete dissolution of the CsBr precursor, rendering CsPbBr3 QD inks practical for device fabrication. The resultant LEDs displayed bright green emission, with a current efficiency, and external quantum efficiency of 9.22 cd A-1 and 2.64%, respectively. This represents the first LED based on CsPbBr3 QDs prepared at room temperature. Lastly, the crown ethers form core-shell structures, opening new avenues to exploit their strong coordination strength.
DOI: 10.1021/acsenergylett.7b01257
Rights: © 2018 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by ACS Energy Letters, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles
IGS Journal Articles
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RTP Journal Articles

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