Increased open-circuit voltage in a Schottky device using PbS quantum dots with extreme confinement

Hyekyoung Choi; Jun Kwan Kim; Jung Hoon Song; Youngjo Kim; Sohee Jeong

doi:10.1063/1.4804614

Increased open-circuit voltage in a Schottky device using PbS quantum dots with extreme confinement

Hyekyoung Choi, Jun Kwan Kim, Jung Hoon Song, Youngjo Kim, Sohee Jeong

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

23 Scopus citations

Abstract

We fabricated the PbS nanocrystal quantum dots (NQDs) based Schottky structure device (ITO/PbS/LiF/Al) with varying bandgap of NQDs from 0.8 to 2.2 eV. The open-circuit voltage increased monotonically with NQDs bandgap until 0.67 V, achieved using extremely confined, 1.5 nm sized-PbS NQDs. The power conversion efficiency reached the maximum value over 3 under AM 1.5 with NQDs bandgap of about 1.3 eV. Size-dependent photovoltaic evaluation in extreme confinement regime provides basis for efficient multi-junction solar cells composed of PbS NQDs of different sizes.

Original language	English
Article number	193902
Journal	Applied Physics Letters
Volume	102
Issue number	19
DOIs	https://doi.org/10.1063/1.4804614
State	Published - 13 May 2013
Externally published	Yes

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title = "Increased open-circuit voltage in a Schottky device using PbS quantum dots with extreme confinement",

abstract = "We fabricated the PbS nanocrystal quantum dots (NQDs) based Schottky structure device (ITO/PbS/LiF/Al) with varying bandgap of NQDs from 0.8 to 2.2 eV. The open-circuit voltage increased monotonically with NQDs bandgap until 0.67 V, achieved using extremely confined, 1.5 nm sized-PbS NQDs. The power conversion efficiency reached the maximum value over 3 under AM 1.5 with NQDs bandgap of about 1.3 eV. Size-dependent photovoltaic evaluation in extreme confinement regime provides basis for efficient multi-junction solar cells composed of PbS NQDs of different sizes.",

author = "Hyekyoung Choi and \{Kwan Kim\}, Jun and \{Hoon Song\}, Jung and Youngjo Kim and Sohee Jeong",

year = "2013",

month = may,

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doi = "10.1063/1.4804614",

language = "English",

volume = "102",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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T1 - Increased open-circuit voltage in a Schottky device using PbS quantum dots with extreme confinement

AU - Choi, Hyekyoung

AU - Kwan Kim, Jun

AU - Hoon Song, Jung

AU - Kim, Youngjo

AU - Jeong, Sohee

PY - 2013/5/13

Y1 - 2013/5/13

N2 - We fabricated the PbS nanocrystal quantum dots (NQDs) based Schottky structure device (ITO/PbS/LiF/Al) with varying bandgap of NQDs from 0.8 to 2.2 eV. The open-circuit voltage increased monotonically with NQDs bandgap until 0.67 V, achieved using extremely confined, 1.5 nm sized-PbS NQDs. The power conversion efficiency reached the maximum value over 3 under AM 1.5 with NQDs bandgap of about 1.3 eV. Size-dependent photovoltaic evaluation in extreme confinement regime provides basis for efficient multi-junction solar cells composed of PbS NQDs of different sizes.

AB - We fabricated the PbS nanocrystal quantum dots (NQDs) based Schottky structure device (ITO/PbS/LiF/Al) with varying bandgap of NQDs from 0.8 to 2.2 eV. The open-circuit voltage increased monotonically with NQDs bandgap until 0.67 V, achieved using extremely confined, 1.5 nm sized-PbS NQDs. The power conversion efficiency reached the maximum value over 3 under AM 1.5 with NQDs bandgap of about 1.3 eV. Size-dependent photovoltaic evaluation in extreme confinement regime provides basis for efficient multi-junction solar cells composed of PbS NQDs of different sizes.

UR - https://www.scopus.com/pages/publications/84877958865

U2 - 10.1063/1.4804614

DO - 10.1063/1.4804614

M3 - Article

AN - SCOPUS:84877958865

SN - 0003-6951

VL - 102

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 19

M1 - 193902

ER -

Increased open-circuit voltage in a Schottky device using PbS quantum dots with extreme confinement

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