SLIDE 1
Arno Smets
- 2. Spectral Utilization
Design Rules Solar Cells
- 1. Bandgap Utilization
- 3. Light Trapping
Solar Cell Operation, Performance and Design Rules Spectral - - PowerPoint PPT Presentation
Solar Cell Operation, Performance and Design Rules Spectral - - PowerPoint PPT Presentation
Solar Cell Operation, Performance and Design Rules Spectral Utilization I - External Quantum Efficiency Week 3.3.2 Arno Smets Design Rules Solar Cells 1. Bandgap Utilization Delicate Interplay 2. Spectral Utilization 3. Light Trapping
SLIDE 2
SLIDE 3
Light Absorption
SLIDE 4
V C
SLIDE 5
10
- 10
- 20
30
- 40
Voltage (V) Current Density (mAcm-2)
- 0.2
0.0 0.2 0.4 0.6 0.8 1.0
Voc Jsc
SLIDE 6
V C
SLIDE 7
10
- 10
- 20
30
- 40
Voltage (V) Current Density (mAcm-2)
- 0.2
0.0 0.2 0.4 0.6 0.8 1.0
Voc Jsc
SLIDE 8
External quantum efficiency
()
) ( ) ( ) ( q J EQE
J()/q
SLIDE 9
External quantum efficiency
Ideal quantum efficiency 1.0 Quantum efficiency Wavelength
SLIDE 10
Xe lamp Chopper Wheel with ‘grey’ filters Bias light Test device Monitor cell Grating monochromator Optical fibre Computer Lock-in Amplifier 1 Lock-in Amplifier 2
SLIDE 11
Xe lamp Chopper Wheel with ‘grey’ filters Bias light Test device Monitor cell Grating monochromator Optical fibre Computer Lock-in Amplifier 1 Lock-in Amplifier 2
SLIDE 12
Xe lamp Chopper Wheel with ‘grey’ filters Bias light Test device Monitor cell Grating monochromator Optical fibre Computer Lock-in Amplifier 1 Lock-in Amplifier 2
SLIDE 13
Xe lamp Chopper Wheel with ‘grey’ filters Bias light Test device Monitor cell Grating monochromator Optical fibre Computer Lock-in Amplifier 1 Lock-in Amplifier 2
SLIDE 14
Xe lamp Chopper Wheel with ‘grey’ filters Bias light Test device Monitor cell Grating monochromator Optical fibre Computer Lock-in Amplifier 1 Lock-in Amplifier 2
SLIDE 15
External quantum efficiency
5 . 1 5 . 1
) ( ) ( ) ( ) ( ) ( d EQE hc P q d EQE q V V J
AM AM SC
SLIDE 16
External quantum efficiency
5 . 1 5 . 1
) ( ) ( ) ( ) ( ) ( d EQE hc P q d EQE q V V J
AM AM SC
SLIDE 17
2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0.00 500 100 2000 150 10 20 30 40 50 60 70
AM1.5 Wavelength (nm)
Relation EQE and Jsc
P() Wm-2 nm-1 JSC (EQE=1) mAcm-2
SLIDE 18
2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0.00 500 100 2000 150 10 20 30 40 50 60 70
JSC (EQE=1) mAcm-2 Wavelength (nm)
Relation EQE and Jsc
P() Wm-2 nm-1 AM1.5
SLIDE 19
500 100 2000 150
Wavelength (x10-9m)
Example
P() (109 Wm-2nm-1)
0.5 1.0 1.5 2.0 2.5
SLIDE 20
Example
500 100 2000 150
Wavelength (x10-9m) P() (109 Wm-2nm-1)
0.5 1.0 1.5 2.0 2.5
] [ 10 5 . 1 10 25 . 2 ) ( 1500 500 ] [ 10 25 . 2 10 5 . 7 ) ( 500 300
1 2 15 9 1 2 9 15
m Wm P nm nm m Wm P nm nm
SLIDE 21
500 100 2000 150
Wavelength (x10-9m)
Example
P() (109 Wm-2nm-1)
0.5 1.0 1.5 2.0 2.5
] [ 900 ) (
2 10 13 10 3
7 7
Wm d P I
m m
SLIDE 22
2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0.00 500 100 3500 150
900 Wm-2 Irradiance I (Wm-2) Wavelength (nm)
Available power in the sunlight
P() (Wm-2 nm-1)
2000 2500 3000 4000 200 400 600 800 1000
SLIDE 23
EQE 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 200 400 600 800 1000 120 1400 Wavelength (x10-9 m)
SLIDE 24
Example
EQE 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 200 400 600 800 1000 1200 1400 Wavelength (x10-9m)
500 1000 2000 1500 Wavelength (x10-9m) P() (109 Wm-2nm-1) 0.5 1.0 1.5 2.0 2.5
] [ 4 . 39 )] 10000 /( 1000 [ 394 ] [ 394 ) 10 41 . 2 10 28 . 3 ( 10 6 . 1 9 . ) ( ) ( ) ( ) (
2 2 2 1 2 21 1 2 20 19 10 11 10 3 10 11 10 3
1100 500 500 300 7 7 7 7
mAcm cm mA Am s m s m e EQE d e EQE d EQE e J
nm nm
m m m m sc
SLIDE 25
Example
EQE 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 200 400 600 800 1000 1200 1400 Wavelength (x10-9m)
500 1000 2000 1500 Wavelength (x10-9m) P() (109 Wm-2nm-1) 0.5 1.0 1.5 2.0 2.5
EQE =100% Jsc = 43.7[mAcm-2]
SLIDE 26
2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0.00 500 100 2000 150 10 20 30 40 50 60 70