Large Spatially Resolved Rectification in a Donor-Acceptor Molecular Heterojunction

Joseph A. Smerdon; Noel C. Giebink; Nathan P. Guisinger; Pierre Darancet; Jeffrey R. Guest

doi:10.1021/acs.nanolett.6b00171

Large Spatially Resolved Rectification in a Donor-Acceptor Molecular Heterojunction

Joseph A. Smerdon, Noel C. Giebink, Nathan P. Guisinger, Pierre Darancet, Jeffrey R. Guest

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

21 Scopus citations

Abstract

We demonstrate that rectification ratios (RR) of ≳250 (≳1000) at biases of 0.5 V (1.2 V) are achievable at the two-molecule limit for donor-acceptor bilayers of pentacene on C₆₀ on Cu using scanning tunneling spectroscopy and microscopy. Using first-principles calculations, we show that the system behaves as a molecular Schottky diode with a tunneling transport mechanism from semiconducting pentacene to Cu-hybridized metallic C₆₀. Low-bias RRs vary by two orders-of-magnitude at the edge of these molecular heterojunctions due to increased Stark shifts and confinement effects.

Original language	English (US)
Pages (from-to)	2603-2607
Number of pages	5
Journal	Nano letters
Volume	16
Issue number	4
DOIs	https://doi.org/10.1021/acs.nanolett.6b00171
State	Published - Apr 13 2016

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.6b00171

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title = "Large Spatially Resolved Rectification in a Donor-Acceptor Molecular Heterojunction",

abstract = "We demonstrate that rectification ratios (RR) of ≳250 (≳1000) at biases of 0.5 V (1.2 V) are achievable at the two-molecule limit for donor-acceptor bilayers of pentacene on C60 on Cu using scanning tunneling spectroscopy and microscopy. Using first-principles calculations, we show that the system behaves as a molecular Schottky diode with a tunneling transport mechanism from semiconducting pentacene to Cu-hybridized metallic C60. Low-bias RRs vary by two orders-of-magnitude at the edge of these molecular heterojunctions due to increased Stark shifts and confinement effects.",

author = "Smerdon, {Joseph A.} and Giebink, {Noel C.} and Guisinger, {Nathan P.} and Pierre Darancet and Guest, {Jeffrey R.}",

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T1 - Large Spatially Resolved Rectification in a Donor-Acceptor Molecular Heterojunction

AU - Smerdon, Joseph A.

AU - Giebink, Noel C.

AU - Guisinger, Nathan P.

AU - Darancet, Pierre

AU - Guest, Jeffrey R.

PY - 2016/4/13

Y1 - 2016/4/13

N2 - We demonstrate that rectification ratios (RR) of ≳250 (≳1000) at biases of 0.5 V (1.2 V) are achievable at the two-molecule limit for donor-acceptor bilayers of pentacene on C60 on Cu using scanning tunneling spectroscopy and microscopy. Using first-principles calculations, we show that the system behaves as a molecular Schottky diode with a tunneling transport mechanism from semiconducting pentacene to Cu-hybridized metallic C60. Low-bias RRs vary by two orders-of-magnitude at the edge of these molecular heterojunctions due to increased Stark shifts and confinement effects.

AB - We demonstrate that rectification ratios (RR) of ≳250 (≳1000) at biases of 0.5 V (1.2 V) are achievable at the two-molecule limit for donor-acceptor bilayers of pentacene on C60 on Cu using scanning tunneling spectroscopy and microscopy. Using first-principles calculations, we show that the system behaves as a molecular Schottky diode with a tunneling transport mechanism from semiconducting pentacene to Cu-hybridized metallic C60. Low-bias RRs vary by two orders-of-magnitude at the edge of these molecular heterojunctions due to increased Stark shifts and confinement effects.

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Large Spatially Resolved Rectification in a Donor-Acceptor Molecular Heterojunction

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