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https://hdl.handle.net/10356/87421
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. | URI: | https://hdl.handle.net/10356/87421 http://hdl.handle.net/10220/44393 |
DOI: | 10.1021/acsenergylett.7b01257 | Schools: | School of Materials Science & Engineering Interdisciplinary Graduate School (IGS) |
Research Centres: | Energy Research Institute @ NTU (ERI@N) Research Techno Plaza |
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: [http://dx.doi.org/10.1021/acsenergylett.7b01257]. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | ERI@N Journal Articles IGS Journal Articles MSE Journal Articles NTC Journal Articles |
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File | Description | Size | Format | |
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CE-CsPbBr3 SA Veldhuis.pdf | 1.19 MB | Adobe PDF | View/Open |
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