Fast and efficient photodetection in nanoscale quantum-dot junctions

Ferry Prins; Michele Buscema; Johannes S. Seldenthuis; Samir Etaki; Gilles Buchs; Maria Barkelid; Val Zwiller; Yunan Gao; Arjan J. Houtepen; Laurens D.A. Siebbeles; Herre S.J. Van Der Zant

doi:10.1021/nl303008y

Fast and efficient photodetection in nanoscale quantum-dot junctions

Ferry Prins
, Michele Buscema
, Johannes S. Seldenthuis
, Samir Etaki
, Gilles Buchs
, Maria Barkelid
, Val Zwiller
, Yunan Gao
, Arjan J. Houtepen
, Laurens D.A. Siebbeles
, Herre S.J. Van Der Zant

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

55 Scopus citations

Abstract

We report on a photodetector in which colloidal quantum dots directly bridge nanometer-spaced electrodes. Unlike in conventional quantum-dot thin film photodetectors, charge mobility no longer plays a role in our quantum-dot junctions as charge extraction requires only two individual tunnel events. We find an efficient photoconductive gain mechanism with external quantum efficiencies of 38 electrons-per-photon in combination with response times faster than 300 ns. This compact device-architecture may open up new routes for improved photodetector performance in which efficiency and bandwidth do not go at the cost of one another.

Original language	English
Pages (from-to)	5740-5743
Number of pages	4
Journal	Nano Letters
Volume	12
Issue number	11
DOIs	https://doi.org/10.1021/nl303008y
State	Published - Nov 14 2012
Externally published	Yes

Keywords

Colloidal quantum dots
nanogap electrodes
nanoscale photodetectors
photoconductive gain

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10.1021/nl303008y

Cite this

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title = "Fast and efficient photodetection in nanoscale quantum-dot junctions",

abstract = "We report on a photodetector in which colloidal quantum dots directly bridge nanometer-spaced electrodes. Unlike in conventional quantum-dot thin film photodetectors, charge mobility no longer plays a role in our quantum-dot junctions as charge extraction requires only two individual tunnel events. We find an efficient photoconductive gain mechanism with external quantum efficiencies of 38 electrons-per-photon in combination with response times faster than 300 ns. This compact device-architecture may open up new routes for improved photodetector performance in which efficiency and bandwidth do not go at the cost of one another.",

keywords = "Colloidal quantum dots, nanogap electrodes, nanoscale photodetectors, photoconductive gain",

author = "Ferry Prins and Michele Buscema and Seldenthuis, \{Johannes S.\} and Samir Etaki and Gilles Buchs and Maria Barkelid and Val Zwiller and Yunan Gao and Houtepen, \{Arjan J.\} and Siebbeles, \{Laurens D.A.\} and \{Van Der Zant\}, \{Herre S.J.\}",

year = "2012",

month = nov,

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doi = "10.1021/nl303008y",

language = "English",

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TY - JOUR

T1 - Fast and efficient photodetection in nanoscale quantum-dot junctions

AU - Prins, Ferry

AU - Buscema, Michele

AU - Seldenthuis, Johannes S.

AU - Etaki, Samir

AU - Buchs, Gilles

AU - Barkelid, Maria

AU - Zwiller, Val

AU - Gao, Yunan

AU - Houtepen, Arjan J.

AU - Siebbeles, Laurens D.A.

AU - Van Der Zant, Herre S.J.

PY - 2012/11/14

Y1 - 2012/11/14

N2 - We report on a photodetector in which colloidal quantum dots directly bridge nanometer-spaced electrodes. Unlike in conventional quantum-dot thin film photodetectors, charge mobility no longer plays a role in our quantum-dot junctions as charge extraction requires only two individual tunnel events. We find an efficient photoconductive gain mechanism with external quantum efficiencies of 38 electrons-per-photon in combination with response times faster than 300 ns. This compact device-architecture may open up new routes for improved photodetector performance in which efficiency and bandwidth do not go at the cost of one another.

AB - We report on a photodetector in which colloidal quantum dots directly bridge nanometer-spaced electrodes. Unlike in conventional quantum-dot thin film photodetectors, charge mobility no longer plays a role in our quantum-dot junctions as charge extraction requires only two individual tunnel events. We find an efficient photoconductive gain mechanism with external quantum efficiencies of 38 electrons-per-photon in combination with response times faster than 300 ns. This compact device-architecture may open up new routes for improved photodetector performance in which efficiency and bandwidth do not go at the cost of one another.

KW - Colloidal quantum dots

KW - nanogap electrodes

KW - nanoscale photodetectors

KW - photoconductive gain

UR - https://www.scopus.com/pages/publications/84869174486

U2 - 10.1021/nl303008y

DO - 10.1021/nl303008y

M3 - Article

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AN - SCOPUS:84869174486

SN - 1530-6984

VL - 12

SP - 5740

EP - 5743

JO - Nano Letters

JF - Nano Letters

IS - 11

ER -

Fast and efficient photodetection in nanoscale quantum-dot junctions

Abstract

Keywords

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