Single-step fabrication of quantum funnels via centrifugal colloidal casting of nanoparticle films.

Jin Young Kim; Valerio Adinolfi; Brandon R Sutherland; Oleksandr Voznyy; S Joon Kwon; Tae Wu Kim; Jeongho Kim; Hyotcherl Ihee; Kyle Kemp; Michael Adachi; Mingjian Yuan; Illan J. Kramer; David Zhitomirsky; Sjoerd Hoogland; Edward H. Sargent

doi:10.1038/ncomms8772

Single-step fabrication of quantum funnels via centrifugal colloidal casting of nanoparticle films.

Jin Young Kim, Valerio Adinolfi, Brandon R Sutherland, Oleksandr Voznyy, S Joon Kwon, Tae Wu Kim, Jeongho Kim, Hyotcherl Ihee, Kyle Kemp, Michael Adachi, Mingjian Yuan, Illan J. Kramer, David Zhitomirsky, Sjoerd Hoogland, Edward H. Sargent

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

Centrifugal casting of composites and ceramics has been widely employed to improve the mechanical and thermal properties of functional materials. This powerful method has yet to be deployed in the context of nanoparticles--yet size-effect tuning of quantum dots is among their most distinctive and application-relevant features. Here we report the first gradient nanoparticle films to be constructed in a single step. By creating a stable colloid of nanoparticles that are capped with electronic-conduction-compatible ligands we were able to leverage centrifugal casting for thin-films devices. This new method, termed centrifugal colloidal casting, is demonstrated to form films in a bandgap-ordered manner with efficient carrier funnelling towards the lowest energy layer. We constructed the first quantum-gradient photodiode to be formed in a single deposition step and, as a result of the gradient-enhanced electric field, experimentally measured the highest normalized detectivity of any colloidal quantum dot photodetector.

Original language	English (US)
Journal	Nature Communications
Volume	6
Issue number	1
DOIs	https://doi.org/10.1038/ncomms8772
State	Published - Jul 13 2015
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-11-009-21
Acknowledgements: This publication is based in part on work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. This work was supported by the Korean Government through the New and Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by MOTIE (No.20133030011320) and by KIST through Institutional Project (2E25411). This work was supported by IBS-R004-G2. J.Y.K. extends appreciation for an NSERC Banting postdoctoral fellowship. We thank E. Palmiano, L. Levina, R. Wolowiec and D. Kopilovic for their help during the course of the study.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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https://repository.kaust.edu.sa/bitstream/10754/596815/1/PMC4510961.pdf

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title = "Single-step fabrication of quantum funnels via centrifugal colloidal casting of nanoparticle films.",

abstract = "Centrifugal casting of composites and ceramics has been widely employed to improve the mechanical and thermal properties of functional materials. This powerful method has yet to be deployed in the context of nanoparticles--yet size-effect tuning of quantum dots is among their most distinctive and application-relevant features. Here we report the first gradient nanoparticle films to be constructed in a single step. By creating a stable colloid of nanoparticles that are capped with electronic-conduction-compatible ligands we were able to leverage centrifugal casting for thin-films devices. This new method, termed centrifugal colloidal casting, is demonstrated to form films in a bandgap-ordered manner with efficient carrier funnelling towards the lowest energy layer. We constructed the first quantum-gradient photodiode to be formed in a single deposition step and, as a result of the gradient-enhanced electric field, experimentally measured the highest normalized detectivity of any colloidal quantum dot photodetector.",

author = "Kim, {Jin Young} and Valerio Adinolfi and Sutherland, {Brandon R} and Oleksandr Voznyy and Kwon, {S Joon} and Kim, {Tae Wu} and Jeongho Kim and Hyotcherl Ihee and Kyle Kemp and Michael Adachi and Mingjian Yuan and Kramer, {Illan J.} and David Zhitomirsky and Sjoerd Hoogland and Sargent, {Edward H.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-11-009-21 Acknowledgements: This publication is based in part on work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. This work was supported by the Korean Government through the New and Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by MOTIE (No.20133030011320) and by KIST through Institutional Project (2E25411). This work was supported by IBS-R004-G2. J.Y.K. extends appreciation for an NSERC Banting postdoctoral fellowship. We thank E. Palmiano, L. Levina, R. Wolowiec and D. Kopilovic for their help during the course of the study. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

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AU - Adinolfi, Valerio

AU - Sutherland, Brandon R

AU - Voznyy, Oleksandr

AU - Kwon, S Joon

AU - Kim, Tae Wu

AU - Kim, Jeongho

AU - Ihee, Hyotcherl

AU - Kemp, Kyle

AU - Adachi, Michael

AU - Yuan, Mingjian

AU - Kramer, Illan J.

AU - Zhitomirsky, David

AU - Hoogland, Sjoerd

AU - Sargent, Edward H.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-11-009-21 Acknowledgements: This publication is based in part on work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. This work was supported by the Korean Government through the New and Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by MOTIE (No.20133030011320) and by KIST through Institutional Project (2E25411). This work was supported by IBS-R004-G2. J.Y.K. extends appreciation for an NSERC Banting postdoctoral fellowship. We thank E. Palmiano, L. Levina, R. Wolowiec and D. Kopilovic for their help during the course of the study. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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N2 - Centrifugal casting of composites and ceramics has been widely employed to improve the mechanical and thermal properties of functional materials. This powerful method has yet to be deployed in the context of nanoparticles--yet size-effect tuning of quantum dots is among their most distinctive and application-relevant features. Here we report the first gradient nanoparticle films to be constructed in a single step. By creating a stable colloid of nanoparticles that are capped with electronic-conduction-compatible ligands we were able to leverage centrifugal casting for thin-films devices. This new method, termed centrifugal colloidal casting, is demonstrated to form films in a bandgap-ordered manner with efficient carrier funnelling towards the lowest energy layer. We constructed the first quantum-gradient photodiode to be formed in a single deposition step and, as a result of the gradient-enhanced electric field, experimentally measured the highest normalized detectivity of any colloidal quantum dot photodetector.

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JO - Nature Communications

JF - Nature Communications

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Single-step fabrication of quantum funnels via centrifugal colloidal casting of nanoparticle films.

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