Issue 4, 2017
From the journal:

Chemical Communications

Engineering the surface chemistry of lead chalcogenide nanocrystal solids to enhance carrier mobility and lifetime in optoelectronic devices†

S. J. Oh, ORCID logo ab   D. B. Straus,c   T. Zhao,a   J.-H. Choi,de   S.-W. Lee,f   E. A. Gaulding,a   C. B. Murrayac  and  C. R. Kagan*acd  

* Corresponding authors

a Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA

b Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea

c Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA

d Department of Electrical and System Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
E-mail: kagan@seas.upenn.edu

e Rare Metals Research Center, Korea Institute of Geoscience and Mineral Resources, Daejeon, Republic of Korea

f Department of Semiconductor System Engineering, Korea University, Seoul 02841, Republic of Korea

Abstract

We introduce a stepwise, hybrid ligand-exchange method for lead chalcogenide nanocrystal (NC) thin films using the compact-inorganic ligand thiocyanate and the short organic ligand benzenediothiolate. Spectroscopic and device measurements show that hybrid exchange enhances both carrier mobility and lifetime in NC thin films. The increased mobility-lifetime product achieved by this method enables demonstration of optoelectronic devices with enhanced power conversion and quantum efficiency.

Graphical abstract: Engineering the surface chemistry of lead chalcogenide nanocrystal solids to enhance carrier mobility and lifetime in optoelectronic devices

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Article information

DOI
https://doi.org/10.1039/C6CC07916D
Article type
Communication
Submitted
30 Way 2016
Accepted
11 Kax 2016
First published
12 Kax 2016

Chem. Commun., 2017,53, 728-731

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Engineering the surface chemistry of lead chalcogenide nanocrystal solids to enhance carrier mobility and lifetime in optoelectronic devices

S. J. Oh, D. B. Straus, T. Zhao, J.-H. Choi, S.-W. Lee, E. A. Gaulding, C. B. Murray and C. R. Kagan, Chem. Commun., 2017, 53, 728 DOI: 10.1039/C6CC07916D

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