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

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

By 12 March 2019 No Comments

Chemical Communications, 2017, vol 53, 10, pp. 1700-1703

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.

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