Structure, transport and photoconductance of PbS quantum dot monolayers functionalized with a copper phthalocyanine derivative

A André; C Theurer; J Lauth; S Maiti; M Hodas; M Samadi Khoshkhoo; S Kinge; A J Meixner; F Schreiber; L D A Siebbeles; K Braun; M Scheele

doi:10.1039/c6cc07878h

Structure, transport and photoconductance of PbS quantum dot monolayers functionalized with a copper phthalocyanine derivative

Chem Commun (Camb). 2017 Jan 31;53(10):1700-1703. doi: 10.1039/c6cc07878h.

Authors

A André¹, C Theurer¹, J Lauth², S Maiti³, M Hodas³, M Samadi Khoshkhoo¹, S Kinge⁴, A J Meixner⁵, F Schreiber⁶, L D A Siebbeles², K Braun¹, M Scheele⁵

Affiliations

¹ Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany. marcus.scheele@uni-tuebingen.de.
² Chemical Engineering Department, Delft University of Technology, Van der Maasweg 9, 2619 HZ Delft, The Netherlands.
³ Institute of Applied Physics, University of Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany.
⁴ Toyota Motor Europe, Materials Research & Development, Hoge Wei 33, B-1930, Zaventem, Belgium.
⁵ Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany. marcus.scheele@uni-tuebingen.de and Center for Light-Matter Interaction, Sensors & Analytics LISA+, University of Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany.
⁶ Institute of Applied Physics, University of Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany and Center for Light-Matter Interaction, Sensors & Analytics LISA+, University of Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany.

PMID: 28102372
DOI: 10.1039/c6cc07878h

Abstract

We simultaneously surface-functionalize PbS nanocrystals with Cu 4,4',4'',4'''-tetraaminophthalocyanine and assemble this hybrid material into macroscopic monolayers. Electron microscopy and X-ray scattering reveal a granular mesocrystalline structure with strong coherence between the atomic lattice and the superlattice of nanocrystals within each domain. Terahertz spectroscopy and field-effect transistor measurements indicate efficient coupling of holes throughout the hybrid thin film, in conjunction with a pronounced photoresponse. We demonstrate the potential of this material for optoelectronic applications by fabricating a light-effect transistor.