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The influence of th...
The influence of the capping ligands on the optoelectronic performance, morphology, and ion liberation of CsPbBr3 perovskite quantum dots
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- Liu, Yong-feng (författare)
- Umeå universitet,Institutionen för fysik,College of Physical Science and Technology, Yangzhou University, Yangzhou, China; Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, China
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- Tang, Shi (författare)
- Umeå universitet,Institutionen för fysik
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- Gao, Zhaoju (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Shao, Xiuwen (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Zhu, Xiaoling (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Ràfols-Ribé, Joan (författare)
- Umeå universitet,Institutionen för fysik
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- Wågberg, Thomas, 1971- (författare)
- Umeå universitet,Institutionen för fysik
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- Edman, Ludvig, 1967- (författare)
- Umeå universitet,Institutionen för fysik
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- Wang, Jia (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- Springer Nature, 2023
- 2023
- Engelska.
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Ingår i: Nano Reseach. - : Springer Nature. - 1998-0124 .- 1998-0000. ; 16:7, s. 10626-10633
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Perovskite quantum dots (PeQDs) endowed with capping ligands exhibit impressive optoelectronic properties and enable for cost-efficient solution processing and exciting application opportunities. We synthesize and characterize three different PeQDs with the same cubic CsPbBr3 core, but which are distinguished by the ligand composition and density. PeQD-1 features a binary didodecyldimethylammonium bromide (DDAB) and octanoic acid capping ligand system, with a high surface density of 1.53 nm−2, whereas PeQD-2 and PeQD-3 are coated by solely DDAB at a gradually lower surface density. We show that PeQD-1 endowed with highest ligand density features the highest dispersibility in toluene of 150 g/L, the highest photoluminescence quantum yield of 95% in dilute solution and 59% in a neat film, and the largest core-to-core spacing in neat thin films. We further establish that ions are released from the core of PeQD-1 when it is exposed to an electric field, although it comprises a dense coating of one capping ligand per four surface core atoms. We finally exploit these combined findings to the development of a light-emitting electrochemical cell (LEC), where the active layer is composed solely of solution-processed pure PeQDs, without additional electrolytes. In this device, the ion release is utilized as an advantage for the electrochemical doping process and efficient emissive operation of the LEC.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- CsPbBr3 quantum dots
- capping ligand
- ion liberation
- light-emitting electrochemical cell
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Liu, Yong-feng
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Tang, Shi
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Gao, Zhaoju
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Shao, Xiuwen
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Zhu, Xiaoling
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Ràfols-Ribé, Joa ...
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visa fler...
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Wågberg, Thomas, ...
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Edman, Ludvig, 1 ...
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Wang, Jia
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- Om ämnet
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Materialteknik
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Atom och molekyl ...
- Artiklar i publikationen
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Nano Reseach
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Umeå universitet