Acronyms and Unit Abbreviations

Acronymns

ACRONYMS	Meaning
a-Si:H	hydrogenated amorphous silicon
AM	air mass
AMOLED	Active Matrix Organic Light-Emitting Displays
AO	All-Optical
AOS	All-Optical Switching
AOS	All-Optical Signal Processing
ASF	Anderson, Schultz, and Flory
BOS	balance of system
CB	conduction band
CHP	combined heat and power
COP	coefficient of performance
CPV	concentrated photovoltaic
dc	direct current
DFT	Density functional theory
DNI	direct normal irradiation
ECL	Electrogenerated chemiluminescence
EFG	edge-defined film-fed growth
EIA	Energy Information Administration
EO	Electro-optic
EPV	electrochemical photovoltaic
ETL	Electron Injection/Transport Layer
HCPV	high-concentration photovoltaic
HHV	higher heating value
HRS	Hyper-Rayleigh Scattering
IR	infrared
ITO	indium tin oxide
IZO	Indium Zinc Oxide
LC	Liquid crystal
LE	Luminous Efficiency
LH1/LH2	light-harvesting pigment/protein complexes
MBE	molecular beam epitaxy
MEG	multiple exciton generation
MESP	minimum ethanol selling price
MOCVD	metalorganic chemical vapor deposition
MZI	Mach-Zehnder Interferometer
NAE	National Academy of Engineering
Nd:Yag	Neodymium doped Ytrium aluminum garnet- a type of laser
NHE	normal hydrogen electrode
NIR	Near Infrared
NLO	Non-linear optics
NRC	National Research Council
OEC	oxygen-evolving complex
OFET	Organic field effect transistor
OLED	organic light emitting diode
OPV	organic photovoltaic (solar cell)
PCET	proton-coupled electron transfer
PC	Photonic crystal
PCM	phase change storage material
PEC	photoelectrochemical
PEM	proton exchange membrane
PET	Polyethylene terephthalate
PMMA	Polymethylmethacrylate
PPV	Polyphenylvinylene
PRD	priority research directions
PT	polythiophene
PV	photovoltaic
R&D	research and development
RC	reaction center
SAML	Self-assembled monolayers
SHG	Second Harmonic Generation
SLO	Spatial Light Modulation
TCO	transparent conducting oxide
TCNL	Thermochemical Nanolithography
TFT	Thin-Film Transistor
THG	Third Harmonic Generation
TM	Transverse Mode
TMS	theoretical modeling and simulation
TPA	Two Photon Absorption
TPF	Two Photon Fluoresence
TPV	thermophotovoltaic
UPS	Ultraviolet photoelectron spectroscopy
U.S.	United States
UV	ultraviolet
WOLED	White organic light-emitting diode
XAFS	X-ray absorption fine-structure (spectroscopy)
XPS	X-ray photoelectron spectroscopy
ZT	thermoelectric figure of merit

Variables and Constants

Common

Symbol	Meaning
c	speed of light (c = 299,792,458 m/s approx 3 x 106m/s)
ν	frequency
h	planck's constant (h = 6.62606896x 10-34 J s = 4.135667 x 10-15eV s)
λ	wavelength (visible spectrum is 400-700nm)

Absorption and Emission

Symbol	Meaning
ε	extinction coefficient of a molecule
Φ	quantum yield
Ψ	wave function

EO Properties

Symbol	Meaning
μ	dipole moment (mu) measured in debyes
α	linear polarizability (alpha)
β	first order hyperpolarizability (microscopic) (beta)
cos3θ	order parameter
δ	Two photo cross section measured in Goppert-Mayer units (GM), with 1 GM=1×10-50 cm4 s molecules−1 photon−1 >100gm is high.)
r	Pockels coefficient or Linear Electo-optic CofficientSecond-order_Processes#Kerr_and_Pockels_Effects Pockels Effect r~ 10-12 – 1—10 m/V
r33	Electro-optic cofficient (chi 33)(FM= 1000 pm/V)
χ2	second-order nonlinear susceptiblity (first order hyperpolarizability) (macroscopic)
χ3	third-order nonlinear susceptiblity (second order hyperpolarizability) (macroscopic) (alpha)(FM= 6-7 x 10-21(m/V)2)
ε	dielectric constant or relative static permittivity
M	Transition dipole moment (measured in debyes)
N	Number Density parameter
φfl	Fluoresence Quantum Yield a ratio of photons absorbed over photons emitted
σ	conductivity (measured in S (Siemens)/cm
t	the electronic coupling, transfer integral or resonance integral
vπ	half-wave driving voltage

Devices

Symbol	Meaning
α	material loss in dB/cm
d	electrode separation
Γ	optical electrical overlap
λ	reorganization energy
μ	charge mobility in cm2 / V s- a mobility >1 is considered good

Units

Abbreviation	Unit
°C	degree(s) Celsius
$/kW	dollar(s) per kilowatt
μm	micrometer(s)
μs	microsecond(s)
Å	angstrom(s) (10-10m)
amp	ampere(s)
as	attaseconds- one quintillionth of a second
Bbl	billion barrels
cm	centimeter(s)
cm/min	centimeter(s) per minute
eV	electron volt(s)
fs	femptosecond(s)
gal	gallon(s)
Gha	gigahectare(s)
GJ	gigajoule(s)
Gtons	gigatons (109 tons = 1 billion tons)
GW	gigawatt(s) (109 W = 1 billion watts)
kg	kilogram(s)
kWh	kilowatt hour(s)
kWth	kilowatt(s) (thermal)
K	Kelvin
L	liter(s)
MHz	megahertz
mm	millimeter(s)
MW	megawatt(s) (106 W = 1 million watts)
MWe	megawatt(s) (electric)
MWth	megawatt(s) (thermal)
MW/yr	megawatt(s) per year
nm	nanometer(s)
nm/s	nanometer(s) per second
ps	picosecond(s)
psi	pound(s) per square inch
s	second(s)
TW	terawatt(s) (1012 W = 1 trillion watts)
W	watt(s)
Wp	peak watt(s)
yr	year(s)

Agencies, Programs and Institutions

ACRONYMS	Meaning
DOE	Department of Energy
IPCC	Intergovernmental Panel on Climate Change
NSDL	National Science Digital Library aka National STEM Distributed Learning