Processing-Structure-Property Relationships in Laser-Annealed PbSe Nanocrystal Thin Films

ACS Nano
Benjamin E TremlTobias Hanrath

Abstract

As nanocrystal (NC) synthesis techniques and device architectures advance, it becomes increasingly apparent that new ways of connecting NCs with each other and their external environment are required to realize their considerable potential. Enhancing inter-NC coupling by thermal annealing has been a long-standing challenge. Conventional thermal annealing approaches are limited by the challenge of annealing the NC at sufficiently high temperatures to remove surface-bound ligands while at the same time limiting the thermal budget to prevent large-scale aggregation. Here we investigate nonequilibrium laser annealing of NC thin films that enables separation of the kinetic and thermodynamic aspects of nanocrystal fusion. We show that laser annealing of NC assemblies on nano- to microsecond time scales can transform initially isolated NCs in a thin film into an interconnected structure in which proximate dots "just touch". We investigate both pulsed laser annealing and laser spike annealing and show that both annealing methods can produce "confined-but-connected" nanocrystal films. We develop a thermal transport model to rationalize the differences in resulting film morphologies. Finally we show that the insights gained from study of...Continue Reading

References

Nov 23, 2000·Accounts of Chemical Research·F W Wise
Sep 24, 2004·Journal of the American Chemical Society·Jeffrey M PietrygaJennifer A Hollingsworth
Oct 8, 2005·Science·Dmitri V Talapin, Christopher B Murray
Apr 10, 2008·Journal of the American Chemical Society·Matt LawArthur J Nozik
Jul 28, 2010·Advanced Materials·Christopher J VineisMercouri G Kanatzidis
Jul 31, 2010·Science·Constanze SchlieheHorst Weller
Aug 25, 2010·ACS Nano·Andrew W WillsDavid J Norris
Aug 2, 2011·ACS Nano·William J BaumgardnerTobias Hanrath
Mar 19, 2013·Nature Materials·Wee-Liat OngJonathan A Malen
Jun 20, 2013·Nano Letters·William J BaumgardnerTobias Hanrath
Oct 18, 2013·Nano Letters·Brian W GoodfellowBrian A Korgel
Jul 31, 2014·Nano Letters·Wenbin LiJu Li
Jan 16, 2014·The Journal of Physical Chemistry Letters·C Jackson StolleBrian A Korgel
May 3, 2012·The Journal of Physical Chemistry Letters·Philippe Guyot-Sionnest

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