Space probe to the Jupiter From JPL, NASA Radioisotope
Thermoelectric Generator (PbTe)
Introduction to Thermoelectric Materials and Devices
9th Semester of 2012 2012.05.24, Thursday Department of Energy Science Sungkyunkwan University
1 Thermoelectric Phenomena and Conversion Efficiency
2 Thermoelectric Transport Theory I : Electrical Properties
3 Thermoelectric Transport Theory II : Thermal Properties
4 Measurement of Thermoelectric Properties
5 Materials Preparation : Bulk
6 Materials Preparation : Thin Film
7 Thermoelectric System : Current and Future of Module
8 Applications : Power Generation and Heat Cooling
9 Thermoelectric Materials : State-of-the-art
10 Thermoelectric Materials : Intermetallics
11 Thermoelectric Materials : Oxides
12 Thermoelectric Materials : Phonon Glass and Electron Crystal (PGEC) Materials
13 Theory and Modeling in Nanostructured Thermoelectrics
14 High efficiency in Low Dimensional Materials
15 Hybrid Energy Conversion Systems of Thermoelectrics
16 Final Exam
Plan
Snyder, Toberer, Nat. Mater. 2008
Thermoelectric Research : Current and Future of Module
Target : High Conversion Efficiency of Thermoelectric Devices
Module : Accumulation of Elements, Contact Resistance (Welding), Shape Diversity for Micro-Scale (Thin Film)
System : Circumstance Suitability (Generation), Diversity of Mass Conversion System, Hybridization with other renewable energy system
Materials : High Efficiency (High ZT), New Materials and Various Categories (Limitation to Heavy Metal Compounds), Properties for Hybridization (Magnetic Semiconductor for Magnetocaloric) (Low Workfunction for Thermionic)
Thin Film
Cascade Conventional
Solar absorber + TE Custom Cooling Device D. Kraemer et al., Nat. Mater. 20011
State of the art
State of the art
State of the art
Bi2Te3, Bi2Se3 and Sb2Te3 and their solid solution
State of the art
Bi2Te3, Bi2Se3 and Sb2Te3 and their solid solution
State of the art
State of the art
Half-Heusler
State of the art
State of the art
State of the art
State of the art
State of the art
State of the art
Skutterudite, Filled Skutterudite
State of the art
State of the art
State of the art
X-ray Rietveld refinement profile for La1Ir4Ge3Sb9 compounds
State of the art
Clathrate
State of the art
Enhancement of DOS(E)
well
barrier
Confinement of conduction
electrons leads to enhancement
of DOS(E)
m
knnn
LmE zyx
2)()
2(
2
22
22222
)(2
3)1
(znynxn
Li zyx
eL
dkkm
dE2
2 dE
k
mdk
12
dkkL
L
dkkdkkN
2
33
3
2
22
4)(
Density of State
32 ,)/1(/)(2 LVkdkkVdkkN ][)2(
2
1)( 132/1
3
2/3 eVcmdEE
mdEEN
3-dimensional system
222
22
222
2222
)(22
)(2
)()2
(2
z
z
z
z
yx nLm
km
nLm
nnLm
E
znL
e z
z
ynxnL
i yx
sin)(
2
dkkm
dE2
2 dE
k
mdk
12
kdkL
L
kdkdkkN
22
2)(
3
3
Density of State
2,//)(2 LSkdkSdkkN ][1
)( 12
2
eVcmdEm
dEEN
2-dimensional system
)()(2
)2
(2
222
,
222
2
zy
zy
x nnLm
nLm
E
zn
Lyn
Le z
z
y
y
xnL
i x
sinsin2
dkkm
dE2
2 dE
k
mdk
12
kdkL
L
dkdkkN
22)(
Density of State
//)(2 dkLdkkN ][1)2(
2
1)( 11
2/12
2/1 eVcmdE
E
mdEEN
1-dimensional system
Presentation Articles by Group 2
Presentation Articles by Group 2