SLIDE 1
PVMD
Delft University of Technology
Learning objectives
- The what, how and why of current matching
- Influence of material properties
- The versatility of silicon oxide
PVMD Arno Smets Delft University of Technology Learning objectives - - PowerPoint PPT Presentation
PVMD Arno Smets Delft University of Technology Learning objectives - - PowerPoint PPT Presentation
Current matching part 1 PVMD Arno Smets Delft University of Technology Learning objectives The what, how and why of current matching Influence of material properties The versatility of silicon oxide Micromorph solar cell 16
SLIDE 2
SLIDE 3
Micromorph solar cell
a-Si:H Glass TCO μc-Si:H
11.6 [mA·cm-2] 15.8 [mA·cm-2]
Tandem cell Top Bottom
2 1 2 1 2
n n R n n
J (mA/cm2) Voltage (V)
12 0.8 1.0 1.2 1.4 1.6 10 8 6 4 2 14 16 0.0 0.2 0.4 0.6
250 nm max 4 μm max
SLIDE 4
Micromorph solar cell
Metal a-Si:H Glass TCO μc-Si:H
11.6 [mA·cm-2] 15.8 [mA·cm-2]
Tandem cell Top Bottom
2 1 2 1 2
n n R n n
J (mA/cm2) Voltage (V)
12 0.8 1.0 1.2 1.4 1.6 10 8 6 4 2 14 16 0.0 0.2 0.4 0.6
250 nm max 4 μm max
SLIDE 5
IRL refractive index
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 350 450 550 650 750 850 950 1050 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 350 450 550 650 750 850 950 1050 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 350 450 550 650 750 850 950 1050 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 350 450 550 650 750 850 950 1050
400 500 600 700 800 900 1000 1100 Wavelength [nm] 0.0 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 EQE No IRL n=2.05 n=1.95 n=1.75 11.6 15.8 12.8 14.3 13.9 13.1 13.2 13.6 Current [mA·cm-2] No IRL n=2.05 n=1.95 n=1.75
Top cell Bottom cell
- M. Boccard et al, IEEE Journal of Photovoltaics, Vol. 4, No. 6, 1368-1373, (2014) EPFL
SLIDE 6
IRL thickness
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 300 400 500 600 700 800 900 1000 1100 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 300 400 500 600 700 800 900 1000 1100 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 300 400 500 600 700 800 900 1000 1100 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 300 400 500 600 700 800 900 1000 1100
400 500 600 700 800 900 1000 1100 0.0 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 No IRL 40 nm 62 nm 95 nm 11.1 13.7 11.5 13.0 12.5 11.8 12.2 12.1 Current [mA·cm-2]
Top cell Bottom cell
No IRL 40 nm 62 nm 95 nm EQE Wavelength [nm]
- P. Buehlmann et al, APL 91, 143505 (2007) University of Neuchatel