Presentaons* - Oregon State Universitysites.science.oregonstate.edu/~tatej/COURSES/ph403/... ·...
Transcript of Presentaons* - Oregon State Universitysites.science.oregonstate.edu/~tatej/COURSES/ph403/... ·...
Presenta(ons
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Organiza(on
• End on (me • Right amount of material • Have a (me budget for each slide • Work towards a take-‐home message • UncluAered slides that enhance your words • Rehearse your talk at least 3 /mes • Did I men(on ending on (me?
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Content
• Work towards a take-‐home message • Focus on results, with short mo(va(on • Make it clear and simple • Lots of graphical informa(on, clearly presented • Keep text short, and don’t read from your slide • No long-‐winded introduc(ons – short (<1min) outline
• Punchy summary
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During the talk
• Face the audience, not the slides • Your slides should support you, not dominate you • Describe your slides; it takes (me for the audience to process graphical informa(on and understand its significance
• Don’t read text – audience can read much more quickly than you can
• Make eye contact; have good body language • Watch where you stand
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Bits and pieces
• Title slide: your name & affilia(on your advisor’s name & affilia(on any funding informa(on the date!
• Acknowledgements to colleagues come at the end and need not be read out.
• Summary slide can be led up at the end for people to read if (me runs out.
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Good habits
• UncluAered slides • Clear message • Use a long pointer or a laser pointer • Listen carefully to ques(ons • Be able to nego(ate to a given slide in ONE keystroke (number your slides)
• Wear nice clothes – shows respect for your audience
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Bad habits
• Holding on to a coffee cup all the way through your talk
• Using your hand to point something out on a slide • Geing in the way of the image -‐ shoulders par(cularly are a problem here!
• Finishing peoples’ ques(ons for them. • Flipping back through slides, desperately searching for one that you could equally well refer to with a well chosen phrase
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What not to say
• I'll come back to this if I have (me. (You won't.)
• I won't show you this slide. • You can't really see it from this slide, but ........
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What to do • Prac(ce your talk beforehand; at least 3 (mes. (It always takes twice as long in the shower, because you go back and correct yourself).
• Look at your slides beforehand from the back of the room.
• Stand well away from the overhead projector when you talk, and face the audience, not the screen. Make eye contact with many people.
• Know your audience. • Relax, smile, you're doing fine!
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Cri(que the next slide
• Informa(on density? • Graphics readability? • Color? • Axes labels & font size?
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BaCuTeF films
Polycrystalline on SiO2 Oriented on MgO
PLD-deposited; single phase; low temperature
10 20 30 40 50 60 702 θ (degrees)
(001)
(002)
(003)
(004)
(005)
(006)
BaCuTeF film
10 20 30 40 502θ (degrees)
powder
400˚C
500˚C
600˚C
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Cri(que the next 2 slides
• Informa(on density? • Understandable? • Color?
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Schema(c of a generic TCO Tr
ansm
ittan
ce (%
)
Wavelength (µm) 0
100
0
Absorption loss
Reflectance plus absorption loss
lg lp
High visible-light transmittance window
Fundamental band-edge (~0.35 µm)
Plasma reflection edge (~1-1.5 µm)
Visible wavelengths
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Thin-‐film solar cells
Substrate n-‐SnO2 n-‐CdS p-‐CdTe
p-‐ZnTe contact
Light
CdTe solar cell
Light
CIGS solar cell
n-‐ZnO n-‐CdS p-‐CIGS
Mo contact Substrate
In both cases, the light first passes through the TCO.
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Cri(que the next 2 slides
• Informa(on density? • Equa(on complexity? • Color?
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The op(cal constants (i) • Subs(tu(ng for the conduc(vity in the expression for the complex permiivity gives,
ε * ω( ) = ε∞ + iε0ω$
% &
'
( ) ωne2m
$
% &
'
( ) −i ω0
2 −ω2$ %
' ( +ω τ
ω02 −ω 2$
% ' (
2+ ω τ( )2
,
- . .
/
.
.
0
1 . .
2
.
.
∴ε * ω( ) = ε∞ + ne2ε0m%
& '
(
) *
ω02 −ω2%
& ( ) + i ω τ( )
ω02 −ω2%
& ( )
2+ ω τ( )2
-
. / /
0
/ /
1
2 / /
3
/ /
∴Re(ε*) = ε1 = ε∞ + ne2
ε0m$
% &
'
( )
ω02 −ω2$
% ' (
ω02 −ω2$
% ' (
2+ ω τ( )2
-
. / /
0
/ /
1
2 / /
3
/ /
and,
Im ε *( ) = ε2 = ne2ε0m"
# $
%
& '
ω τ( )ω0
2 −ω2" #
% &
2+ ω τ( )2
+
, - -
.
- -
/
0 - -
1
- -
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Solution to Boltzmann’s equation: Seebeck effect, a
• Parabolic band • High degeneracy • Ellipsoidal constant energy surfaces
α = 2
3k 2Tq2
π3n( )
23 md
* s2+ 3
2{ }
• a (n, m*, s) • Knowledge of s would give us m* • Need a transport phenomenon that is sensitive to s.
Scattering parameter
RHall =
1qn
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Slides -‐ summary
• Get the basics right Font sizes large Graphical informa(on clear and crisp Colors with good contrast
• Minimal text • Make sure videos & anima(ons work • No distrac(ng fly ins
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Font sizes
48 point 40 point
32 point
18 point
11 point
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Font colors
Red on black
Yellow on white
Blue on green
White on blue
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Font colors
Magenta on cyan
Yellow on green
Red on green
Black on orange
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Logis(cs
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• All talks to be loaded on Weniger 304 computer on Tuesday 9-‐10 am
• Laser pointer will available • All should aAend unless an exam conflict