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Over What Length Scale Does an Inorganic Substrate Perturb the Structure of a Glassy Organic Semiconductor?

Journal Article · · ACS Applied Materials and Interfaces
 [1];  [2];  [1];  [1];  [3];  [1];  [4];  [3];  [1]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Univ. of Chicago, IL (United States)
  3. Univ. of Chicago, IL (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
+ Show Author Affiliations
While the bulk structure of vapor-deposited glasses has been extensively studied, structure at buried interfaces has received little attention, despite being important for organic electronic applications. To learn about glass structure at buried interfaces, we study the structure of vapor-deposited glasses of the organic semiconductor DSA-Ph (1,4-di-[4-(N,N-diphenyl)amino]styrylbenzene) as a function of film thickness; the structure is probed with grazing incidence X-ray scattering. Here, we deposit on silicon and gold substrates and span a film thickness range of 10–600 nm. Our experiments demonstrate that interfacial molecular packing in vapor-deposited glasses of DSA-Ph is more disordered compared to the bulk. At a deposition temperature near room temperature, we estimate ~8 nm near the substrate can have modified molecular packing. Molecular dynamics simulations of a coarse-grained representation of DSA-Ph reveal a similar length scale. In both the simulations and the experiments, deposition temperature controls glass structure beyond this interfacial layer of a few nanometers.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357; AC02-76SF00515; SC0002161
OSTI ID:
1647596
Alternate ID(s):
OSTI ID: 1767438
Journal Information:
ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 23 Vol. 12; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (55)

Energy Level Alignment and Interfacial Electronic Structures at Organic/Metal and Organic/Organic Interfaces journal June 1999
Orientation Control of Linear-Shaped Molecules in Vacuum-Deposited Organic Amorphous Films and Its Effect on Carrier Mobilities journal February 2010
Effects of Confinement on Microstructure and Charge Transport in High Performance Semicrystalline Polymer Semiconductors journal November 2012
Substrate-Induced and Thin-Film Phases: Polymorphism of Organic Materials on Surfaces journal January 2016
Precise Structure of Pentacene Monolayers on Amorphous Silicon Oxide and Relation to Charge Transport journal June 2009
Molecular Characterization of Organic Electronic Films journal August 2010
Understanding surfaces and buried interfaces of polymer materials at the molecular level using sum frequency generation vibrational spectroscopy journal January 2007
Vertical confinement and interface effects on the microstructure and charge transport of P3HT thin films journal February 2013
Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Probing buried interfaces with non-linear optical spectroscopy journal March 2002
Morphology identification of the thin film phases of vacuum evaporated pentacene on SIO2 substrates journal July 1999
Molecular layering in a liquid on a solid substrate: an X-ray reflectivity study journal June 2000
Negative giant surface potential of vacuum-evaporated tris(7-propyl-8-hydroxyquinolinolato) aluminum(III) [Al(7-Prq)3] film journal August 2013
Anisotropic Vapor-Deposited Glasses: Hybrid Organic Solids journal January 2019
Structural Characterization of Vapor-Deposited Glasses of an Organic Hole Transport Material with X-ray Scattering journal April 2015
Origin of Anisotropic Molecular Packing in Vapor-Deposited Alq3 Glasses journal December 2018
Vapor-Deposited Glass Structure Determined by Deposition Rate–Substrate Temperature Superposition Principle journal June 2019
Interface Engineering: An Effective Approach toward High-Performance Organic Field-Effect Transistors journal October 2009
Molecular Orientation-Dependent Ionization Potential of Organic Thin Films journal November 2008
The Nature of the Glassy State and the Behavior of Liquids at Low Temperatures. journal October 1948
Can We Control the Thickness of Ultrathin Silica Layers by Hyperthermal Silicon Oxidation at Room Temperature? journal November 2011
Horizontal Orientation of Disk-like Hole Transport Molecules and Their Application for Organic Light-Emitting Diodes Requiring a Lower Driving Voltage journal April 2012
Quantification of Thin Film Crystallographic Orientation Using X-ray Diffraction with an Area Detector journal June 2010
Control of Air-Interface-Induced Perpendicular Nanocylinder Orientation in Liquid Crystal Block Copolymer Films by a Surface-Covering Method journal January 2015
Age and structure of a model vapour-deposited glass journal October 2016
Highly oriented crystals at the buried interface in polythiophene thin-film transistors journal February 2006
Tailored exciton diffusion in organic photovoltaic cells for enhanced power conversion efficiency journal November 2012
Energy disorder and energy level alignment between host and dopant in organic semiconductors journal January 2019
Probing the interfacial molecular packing in TIPS-pentacene organic semiconductors by surface enhanced Raman scattering journal January 2014
Approaches for fabricating high efficiency organic light emitting diodes journal January 2015
All-atom simulation of molecular orientation in vapor-deposited organic light-emitting diodes journal January 2018
Generic packing motifs in vapor-deposited glasses of organic semiconductors journal January 2019
Thickness dependence of the elastic modulus of tris(8-hydroxyquinolinato)aluminium journal January 2010
Molecular orientation in small-molecule organic light-emitting diodes journal January 2011
Thickness dependent modulus of vacuum deposited organic molecular glasses for organic electronics applications journal January 2011
Spontaneous buildup of giant surface potential by vacuum deposition of Alq3 and its removal by visible light irradiation journal December 2002
Large surface potential of Alq3 film and its decay journal January 2005
Coarse-grained interaction potentials for polyaromatic hydrocarbons journal February 2006
Enhanced hole mobility in ambipolar rubrene thin film transistors on polystyrene journal March 2008
Charge accumulation at organic semiconductor interfaces due to a permanent dipole moment and its orientational order in bilayer devices journal June 2012
Perspective: Supercooled liquids and glasses journal August 2012
Orientational anisotropy in simulated vapor-deposited molecular glasses journal September 2015
Long-range correlated dynamics in ultra-thin molecular glass films journal September 2016
Local glass transition temperature T g ( z ) of polystyrene next to different polymers: Hard vs. soft confinement journal May 2017
Tunable molecular orientation and elevated thermal stability of vapor-deposited organic semiconductors journal March 2015
Vapor deposition of a nonmesogen prepares highly structured organic glasses journal September 2019
Emitter Orientation as a Key Parameter in Organic Light-Emitting Diodes journal September 2017
Growth of pentacene on clean and modified gold surfaces journal February 2007
Molecular orientation in soft matter thin films studied by resonant soft x-ray reflectivity journal April 2011
Smectic-layer growth at solid interfaces journal April 1990
Structural Relaxation Made Simple journal October 2006
High-performance organic light-emitting diodes comprising ultrastable glass layers journal May 2018
Positive Giant Surface Potential of Tris(8-hydroxyquinolinolato) Aluminum (Alq$_{3}$) Film Evaporated onto Backside of Alq$_{3}$ Film Showing Negative Giant Surface Potential journal April 2012
Stochastic analysis on temperature-dependent roughening of amorphous organic films journal April 2010
Simple model-free estimation of orientation order parameters of vacuum-deposited and spin-coated amorphous films used in organic light-emitting diodes journal August 2015

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36 MATERIALS SCIENCE
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organic-inorganic interface
organic−inorganic interface
thickness
ultrathin films