Page 118 - Mirjam-Theelen-Degradation-of-CIGS-solar-cells
P. 118
Chapter 4
where a (norm) is the temperature dependency of any of the parameters V J η
sc,
oc,
or fill factor, while the amount dX / dT was extracted for parameters V J η or fill
oc,
sc,
factorfrom Table 4.2. X °C is the reference value for this parameter for this sample at
25
25°C.
It should be noted that the CIGS on SLG, only SLG Au samples with sodium are included
into Table 4.3, since the absence of sodium as well as the use of soldered contacts will
not occur in real life panels. Since their electrical parameters at room temperature
as well as their temperature dependencies can be deviating from standard cells, this
would hinder the comparison. In order to include all measurements from this study,
an additional line including all samples can be found in Table 4.3. In general, this table
should be handled with care, since the temperature coefficients are influenced by a
Table 4.3 The normalised temperature coefficients of different types of solar cells
based on this work and references [1,4,7,10,11,12,13,14,15,16,17]
η (%/ºC) V oc (%/ºC) J sc (%/ºC) FF (%/ºC)
c-Si [4,7] -0.37 to -0.52 -0.25 to -0.55 +0.02 to +0.08 -0.19
a-Si [4,7] -0.1 to -0.29 -0.19 to -0.5 +0.12 +0.1
CdTe [4,7] -0.18 to -0.36 -0.22 to -0.43 +0.02 to +0.08 -0.01
CIGS [1] -0.65 to -0.72 -0.48 to -0.51 -0.03 to -0.04
CIGS [7] -0.36 -0.31 +0.02 -0.08
CIGS [16] -0.6 -0.5
CIGS [14,15] -0.26 to -0.6
CIGS [17] with CdS -0.39 -0.26 0 -0.10
CIGS [17] with ZnS -0.41 -0.31 -0.02 -0.10
CIGS [10,11] -0.38, -0.39
CIGS [12,13] -0.31 -0.29, -0.30 0.01
CIGS (this work) -0.36 to -0.70 -0.28 to -0.47 +0.32 to -0.05 +0.06 to -0.45
CIGS (this work, SLG Au) -0.36 to -0.47 -0.28 to -0.32 -0.01 to -0.05 -0.09 to -0.20
CIGS (this work, PI) -0.55 to -0.70 -0.39 to -0.47 +0.03 to +0.32 -0.25 to -0.45
116
where a (norm) is the temperature dependency of any of the parameters V J η
sc,
oc,
or fill factor, while the amount dX / dT was extracted for parameters V J η or fill
oc,
sc,
factorfrom Table 4.2. X °C is the reference value for this parameter for this sample at
25
25°C.
It should be noted that the CIGS on SLG, only SLG Au samples with sodium are included
into Table 4.3, since the absence of sodium as well as the use of soldered contacts will
not occur in real life panels. Since their electrical parameters at room temperature
as well as their temperature dependencies can be deviating from standard cells, this
would hinder the comparison. In order to include all measurements from this study,
an additional line including all samples can be found in Table 4.3. In general, this table
should be handled with care, since the temperature coefficients are influenced by a
Table 4.3 The normalised temperature coefficients of different types of solar cells
based on this work and references [1,4,7,10,11,12,13,14,15,16,17]
η (%/ºC) V oc (%/ºC) J sc (%/ºC) FF (%/ºC)
c-Si [4,7] -0.37 to -0.52 -0.25 to -0.55 +0.02 to +0.08 -0.19
a-Si [4,7] -0.1 to -0.29 -0.19 to -0.5 +0.12 +0.1
CdTe [4,7] -0.18 to -0.36 -0.22 to -0.43 +0.02 to +0.08 -0.01
CIGS [1] -0.65 to -0.72 -0.48 to -0.51 -0.03 to -0.04
CIGS [7] -0.36 -0.31 +0.02 -0.08
CIGS [16] -0.6 -0.5
CIGS [14,15] -0.26 to -0.6
CIGS [17] with CdS -0.39 -0.26 0 -0.10
CIGS [17] with ZnS -0.41 -0.31 -0.02 -0.10
CIGS [10,11] -0.38, -0.39
CIGS [12,13] -0.31 -0.29, -0.30 0.01
CIGS (this work) -0.36 to -0.70 -0.28 to -0.47 +0.32 to -0.05 +0.06 to -0.45
CIGS (this work, SLG Au) -0.36 to -0.47 -0.28 to -0.32 -0.01 to -0.05 -0.09 to -0.20
CIGS (this work, PI) -0.55 to -0.70 -0.39 to -0.47 +0.03 to +0.32 -0.25 to -0.45
116
