conductive afm approaches towards functional nanoelectronics

1

Leibniz Institute

For Solid State and

Materials Research

Dresden

Conductive AFM approaches towards

functional nanoelectronics

March 16, 2016

Web Seminar Keysight Technologies: New AFM-enabled electrical measurement techniques

Conductive AFM techniques A tool for local electrical characterization

Dr. Pablo F. Siles, Material Systems for Nanoelectronics - TU Chemnitz, March 16, 2016 2

Advanced conductive AFM methods A tool for nanoscale transport research

German Research Foundation

Towards Molecular Spintronics Research Unit

Chemistry:

(synthesis)

Theory:

(modelling)

Magnetism:

(characterization, basic research)

Surface Science:

(characterization, basic research)

Devices:

(technological applications)


Outlook Towards Functional Nanoelectronics

Application to organic systems:

- Local transport studies of metalloporphyrin, phthalocyanine and

other organic thin films & nanostructures

- Identification of transport mechanism and mobility of charge

carriers

- Local tuning and manipulation of transport properties in organic

multilayers


Investigation of local transport properties of a wide range of

materials for implementations in fabrication of novel devices

(memristors, nanocapacitors, molecular electronics, etc)

Local IV Spectroscopy Spatial Current Mapping

Dr. Pablo F. Siles, Material Systems for Nanoelectronics - TU Chemnitz, March 16, 2016

Conductive AFM a tool for local electrical investigations

5


Conductive AFM a tool for local electrical investigations

Dynamic spatial mapping approach

6

Transport studies in organic systems Metalloporphyrins

Morphology and local transport characteristics of

metalloporphyrin thin films




8

AFM local electrical analysis on Cu-TMPP: semiconducting matrix



9

AFM local electrical analysis on Cu-TMPP: semiconducting matrix

Cs-AFM on organic thin films Terbium(III) bis(phthalocyanine)

Optical and electrical transport of thin films of

Terbium(III) bis(phthalocyanine) (TbPc2)


Cs-AFM on organic films Exploring transport mechanism on TbPc2

High reproducibility in cs-AFM modes

Determination of transport mechanism

for TbPc2 thin films

Robaschik, Siles et al,. Beilstein J. Nanotechnolol., 5, 2070-2078 (2014)

see also: J. Mater. Chem. C, 3, 8039-8049 (2015)


Cs-AFM on organic films Nanoscale mapping of carrier mobility


Transport dynamics MnPc and F16(metal)Pc heterostructures

Tunable charge transfer properties in metal-

phthalocyanine heterojunctions



locally tune the

transport properties

via organic doping?


Tunable charge transfer properties in metal-

phthalocyanine heterojunctions

Siles et al., just accepted, Nanoscale (RSC), (2016)

15



Spatial transport: enhancement & homogeneity


16

Transport mechanism & spatial mobility mapping




17

Towards Functional Nanoelectronics via advanced conductive AFM methods

Basic and applied research

Study of electrical

properties in

organics systems

Towards fabrication of

organic-based devices

Understanding of

intrinsic electric

properties

Tuning of transport

characteristics Local control of

transport properties


Adv. Mater., DOI: 10.1002/adma.201506293 (2016)

Analytical Chemistry, 84, 8399, (2012)

Phys. Status Solidi A, 211, 2563, (2014)

20

ACS Appl. Mater. Interfaces, 5, 12764, (2013)

Morphology and local transport characteristics of metalloporphyrin thin films

• C. C. Bof Bufon, D. Grim, A. R. Jelil, C. Mende, F. Lungwitz, G. Salvan, D. R. T. Zahn, H. Lang, O.

G. Schmidt

Optical and electrical transport of thin films of Terbium(III) bis(phthalocyanine) (TbPc2)

• P. Robaschik, D. Bülz, P. Richter, M. Monecke, M. Fronk, S. Klyatskaya, D. Grim, O. G. Schmidt,

M. Ruben, D. R. T. Zahn, G. Salvan

Tunable charge transfer properties in metal-phthalocyanine heterojunctions

• T. Hahn, G. Salvan, M. Knupfer, F. Zhu, D. R. T. Zahn, O. G. Schmidt

Nanostructured organic systems via surface potential investigations

• M. Devarajulu, V. Bandari, F. Zhu, O. G. Schmidt, F. Rükerln, M. Knupfer

Financial support:


Acknowledgements

21

conductive afm approaches towards functional nanoelectronics

Documents