Bifacial heterojunction silicon solar cells by hot-wire CVD with open-circuit voltages exceeding 600 mV

2006 ◽  
Vol 511-512 ◽  
pp. 415-419 ◽  
Author(s):  
C. Voz ◽  
D. Muñoz ◽  
M. Fonrodona ◽  
I. Martin ◽  
J. Puigdollers ◽  
...  
Keyword(s):  
Solar Cells ◽  
Open Circuit ◽  
Silicon Solar Cells ◽  
Hot Wire ◽  
Open Circuit Voltages

scholarly journals Electrically flat/optically rough substrates for efficiencies above 10% in n-i-p thin-film silicon solar cells

2012 ◽  
Vol 1426 ◽  
pp. 39-44 ◽  
Author(s):  
Karin Söderström ◽  
Grégory Bugnon ◽  
Franz-Josef Haug ◽  
Christophe Ballif
Keyword(s):  
Solar Cells ◽  
Relative Efficiency ◽  
Light Trapping ◽  
Open Circuit ◽  
High Light ◽  
Silicon Solar Cells ◽  
Efficiency Gain ◽  
Microcrystalline Silicon ◽  
Flat Interface ◽  
Open Circuit Voltages

ABSTRACTSubstrates with extremely low roughness to allow the growth of good-quality silicon material but that nevertheless present high light trapping properties are presented. In a first application, silver reflectors are used in single and tandem-junction amorphous silicon (a-Si:H) solar cells. High initial (stable) efficiencies of 10.4 % (8.1 %) for single-junction a-Si:H cells on glass and 11.1 % (9.2 %) for tandem-junction a-Si:H/a-Si:H cells on plastic are obtained. A second application better suited to multi-junction solar cells based on microcrystalline silicon (μc-Si:H) solar cells is presented: the substrate consists of rough zinc oxide (ZnO) grown on a flat silver reflector which is covered with a-Si:H; polishing of this structure yields an a-Si:H/ZnO interface that provides high light scattering even though the cell is deposited on a flat interface. We present results of ∼ 4-μm-thick μc-Si:H solar cells prepared on such substrates with high open-circuit voltages of 520 mV. A large relative efficiency gain of 20% is observed compared to a co-deposited cell grown directly on an optimized textured substrate.

Improvement of open circuit voltage in microcrystalline silicon solar cells using hot wire buffer layers

2006 ◽  
Vol 352 (9-20) ◽  
pp. 1859-1862 ◽  
Author(s):  
Y. Mai ◽  
S. Klein ◽  
R. Carius ◽  
H. Stiebig ◽  
L. Houben ◽  
...  
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Buffer Layers ◽  
Silicon Solar Cells ◽  
Hot Wire ◽  
Microcrystalline Silicon

High open-circuit voltages on thin silicon solar cells

2014 ◽  
Author(s):  
Stuart Bowden ◽  
Stanislau Herasimenka ◽  
William Dauksher ◽  
Clarence Tracy ◽  
Christiana Honsberg
Keyword(s):  
Solar Cells ◽  
Open Circuit ◽  
Silicon Solar Cells ◽  
Thin Silicon ◽  
Open Circuit Voltages

Microcrystalline Single-Junction and Micromorph Tandem Thin Film Silicon Solar Cells

1998 ◽  
Vol 507 ◽  
Author(s):  
J. Meier ◽  
H. Keppner ◽  
S. Dubail ◽  
U. Kroll ◽  
P. Torres ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Open Circuit ◽  
Silicon Solar Cells ◽  
Microcrystalline Silicon ◽  
Temperature Dependent ◽  
Cell Temperature ◽  
Recombination Mechanism ◽  
Tandem Cell ◽  
Open Circuit Voltages

ABSTRACTHigher open circuit voltages of the microcrystalline silicon bottom cell have a direct impact on the efficiency of the micromorph (μc-Si:H/a-Si:H) tandem cell. In this paper it is shown that open circuit voltages over 500 mV can be achieved leading to gc-Si:H cell efficiencies of 8.5 %. The behaviour of such cells is characterised both by the illuminated and the dark I-V characteristics in function of cell temperature. Microcrystalline cells with Voc-values higher than 500 mV and micromorph tandems possess in general a lower value of the temperature coefficient of the fill factor and thus of the efficiency, when compared to c-Si. Temperature-dependent dark I-V measurements suggest that the dominant recombination mechanism in lgc-Si:H cells is different from that prevailing in a-Si:H solar cells.

Kinetics of Light-Induced Effects in Mixed-Phase Hydrogenated Silicon Solar Cells

2003 ◽  
Vol 762 ◽  
Author(s):  
Guozhen Yuea ◽  
Baojie Yan ◽  
Jeffrey Yang ◽  
Kenneth Lord ◽  
Subhendu Guha
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Equivalent Circuit Model ◽  
Open Circuit ◽  
Mixed Phase ◽  
Silicon Solar Cells ◽  
Initial Increase ◽  
Soaking Time ◽  
Hydrogenated Silicon ◽  
Kinetics Of

AbstractWe have observed a significant light-induced increase in the open-circuit voltage (Voc) of mixed-phase hydrogenated silicon solar cells. In this study, we investigate the kinetics of the light-induced effects. The results show that the cells with different initial Voc have different kinetic behavior. For the cells with a low initial Voc (less than 0.8 V), the increase in Voc is slow and does not saturate for light-soaking time of up to 16 hours. For the cells with medium initial Voc (0.8 ∼ 0.95 V), the Voc increases rapidly and then saturates. Cells with high initial Voc (0.95 ∼ 0.98 V) show an initial increase in Voc, followed bya Voc decrease. All light-soaked cells exhibit a degradation in fill factor. The temperature dependence of the kinetics shows that light soaking at high temperatures causes Voc increase to saturate faster than at low temperatures. The observed results can be explained by our recently proposed two-diode equivalent-circuit model for mixed-phase solar cells.

Sign in / Sign up

Export Citation Format

Share Document