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Title: Excited Electron Dynamics at Semiconductor–Molecule Type-II Heterojunction Interface: First-Principles Dynamics Simulation

Journal Article · · Journal of Physical Chemistry Letters
 [1];  [1]
  1. Univ. of North Carolina, Chapel Hill, NC (United States)

Excited electron dynamics at semiconductor–molecule interfaces is ubiquitous in various energy conversion technologies. However, a quantitative understanding of how molecular details influence the quantum dynamics of excited electrons remains a great scientific challenge because of the complex interplay of different processes with various time scales. Here in this paper, we employ first-principles electron dynamics simulations to investigate how molecular features govern the dynamics in a representative interface between the hydrogen-terminated Si(111) surface and a cyanidin molecule. Hot electron transfer to the chemisorbed molecule was observed but was short-lived on the molecule. Interfacial electron transfer to the chemisorbed molecule was found to be largely decoupled from hot electron relaxation within the semiconductor surface. While the hot electron relaxation was found to take place on a time scale of several hundred femtoseconds, the subsequent interfacial electron transfer was slower by an order of magnitude. Finally, at the same time, this secondary process of picosecond electron transfer is comparable in time scale to typical electron trapping into defect states in the energy gap.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Solar Fuels (UNC EFRC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001011; AC02-05CH11231
OSTI ID:
1371353
Journal Information:
Journal of Physical Chemistry Letters, Vol. 7, Issue 8; Related Information: UNC partners with University of North Carolina (lead); Duke University; University of Florida; Georgia Institute of Technology; University; North Carolina Central University; Research Triangle Institute; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

References (53)

A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films journal October 1991
Photoelectrochemical cells journal November 2001
Excitonic Solar Cells journal May 2003
Excited-State Metal-to-Ligand Charge Transfer Dynamics of a Ruthenium(II) Dye in Solution and Adsorbed on TiO 2 Nanoparticles from Resonance Raman Spectroscopy journal December 2003
Photodriven heterogeneous charge transfer with transition-metal compounds anchored to TiO 2 semiconductor surfaces journal January 2009
Making Oxygen with Ruthenium Complexes journal December 2009
Dye-Sensitized Solar Cells journal November 2010
Ultrafast Electron Transfer Dynamics from Molecular Adsorbates to Semiconductor Nanocrystalline Thin Films journal May 2001
Photoinduced Ultrafast Heterogeneous Electron Transfer at Molecule–Semiconductor Interfaces journal September 2014
Efficiency of hot‐carrier solar energy converters journal May 1982
Quantum dot solar cells journal April 2002
Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer journal August 1994
Efficient CdSe/CdS Quantum Dot Light-Emitting Diodes Using a Thermally Polymerized Hole Transport Layer journal March 2006
Semiconductor Quantum Dots and Quantum Dot Arrays and Applications of Multiple Exciton Generation to Third-Generation Photovoltaic Solar Cells journal November 2010
Chemical Control of the Photoluminescence of CdSe Quantum Dot−Organic Complexes with a Series of Para-Substituted Aniline Ligands journal January 2010
Simultaneous Determination of the Adsorption Constant and the Photoinduced Electron Transfer Rate for a Cds Quantum Dot–Viologen Complex journal July 2011
Photochemical Charge Transfer and Trapping at the Interface between an Organic Adlayer and an Oxide Semiconductor journal November 2003
Materials interface engineering for solution-processed photovoltaics journal August 2012
Dynamics of the Photoexcited Electron at the Chromophore–Semiconductor Interface journal February 2008
Theoretical Insights into Photoinduced Charge Transfer and Catalysis at Oxide Interfaces journal December 2012
Photoinduced electron dynamics at the chromophore–semiconductor interface: A time-domain ab initio perspective journal March 2009
Band Bending in Semiconductors: Chemical and Physical Consequences at Surfaces and Interfaces journal June 2012
Charge Transport versus Recombination in Dye-Sensitized Solar Cells Employing Nanocrystalline TiO 2 and SnO 2 Films journal June 2005
Revealing the Relationship between Semiconductor Electronic Structure and Electron Transfer Dynamics at Metal Oxide–Chromophore Interfaces journal November 2013
Molecular Chromophore–Catalyst Assemblies for Solar Fuel Applications journal August 2015
Photoinduced Interfacial Electron Transfer within a Mesoporous Transparent Conducting Oxide Film journal January 2014
Ultrafast Charge Separation and Recombination Dynamics in Lead Sulfide Quantum Dot–Methylene Blue Complexes Probed by Electron and Hole Intraband Transitions journal June 2011
Bulk Transport and Interfacial Transfer Dynamics of Photogenerated Carriers in CdSe Quantum Dot Solid Electrodes journal July 2013
Assessment of Hot-Carrier Effects on Charge Separation in Type-II CdS/CdTe Heterostructured Nanorods journal August 2014
Influence of Thermal Fluctuations on Interfacial Electron Transfer in Functionalized TiO 2 Semiconductors journal December 2005
Ab I nitio Nonadiabatic Molecular Dynamics of the Ultrafast Electron Injection across the Alizarin−TiO 2 Interface journal June 2005
Interfacial Electron Transfer in TiO 2 Surfaces Sensitized with Ru(II)−Polypyridine Complexes journal July 2009
Ab Initio Nonadiabatic Molecular Dynamics of the Ultrafast Electron Injection from a PbSe Quantum Dot into the TiO 2 Surface journal November 2011
Dynamics of charge transfer at Au/Si metal-semiconductor nano-interface journal October 2013
Anatomy of the Photochemical Reaction: Excited-State Dynamics Reveals the C–H Acidity Mechanism of Methoxy Photo-oxidation on Titania journal April 2015
Dynamics of the Photogenerated Hole at the Rutile TiO 2 (110)/Water Interface: A Nonadiabatic Simulation Study journal November 2014
Electronic excitations in light absorbers for photoelectrochemical energy conversion: first principles calculations based on many body perturbation theory journal January 2013
Ideal hydrogen termination of the Si (111) surface journal February 1990
Electronic and spectroscopic properties of the hydrogen-terminated Si(111) surface from ab initio calculations journal July 2010
Molecular dynamics with electronic transitions journal July 1990
Proton transfer in solution: Molecular dynamics with quantum transitions journal September 1994
First-Principles Theory of Quasiparticles: Calculation of Band Gaps in Semiconductors and Insulators journal September 1985
Electron correlation in semiconductors and insulators: Band gaps and quasiparticle energies journal October 1986
Electronic excitations: density-functional versus many-body Green’s-function approaches journal June 2002
Mixed quantum-classical equilibrium journal March 2005
Nonadiabatic couplings from the Kohn-Sham derivative matrix: Formulation by time-dependent density-functional theory and evaluation in the pseudopotential framework journal December 2010
Role of Surface Termination on Hot Electron Relaxation in Silicon Quantum Dots: A First-Principles Dynamics Simulation Study journal September 2015
Generalized Gradient Approximation Made Simple journal October 1996
Norm-Conserving Pseudopotentials journal November 1979
Architecture of Qbox: A scalable first-principles molecular dynamics code journal January 2008
QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials journal September 2009
yambo: An ab initio tool for excited state calculations journal August 2009
Metal-insulator transition in Kohn-Sham theory and quasiparticle theory journal March 1989

Cited By (2)

Overview of Computational Simulations in Quantum Dots journal April 2019
Dependence of hot electron transfer on surface coverage and adsorbate species at semiconductor–molecule interfaces journal January 2018