Current transport efficiency analysis of multijunction solar cells by luminescence imaging

2019 ◽  
Vol 27 (10) ◽  
pp. 835-843 ◽  
Author(s):  
Hao Xu ◽  
Amaury Delamarre ◽  
Bernice Mae F. Yu Jeco ◽  
Hugh Johnson ◽  
Kentaroh Watanabe ◽  
...  
Keyword(s):  
Solar Cells ◽  
Efficiency Analysis ◽  
Current Transport ◽  
Transport Efficiency ◽  
Luminescence Imaging ◽  
Multijunction Solar Cells

Determination of Current Transport Efficiency Map by Optoelectronic Reciprocity Relation in CdTe Solar Cells

2018 ◽  
Vol 8 (6) ◽  
pp. 1767-1772 ◽  
Author(s):  
Aobo Ren ◽  
Hao Xu ◽  
Amaury Delamarre ◽  
Cai Liu ◽  
Lili Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Reciprocity Relation ◽  
Current Transport ◽  
Transport Efficiency ◽  
Cdte Solar Cells ◽  
Efficiency Map

Lock-in Thermography-Based Local Efficiency Analysis of Solar Cells

2012 ◽  
Author(s):  
Otwin Breitenstein
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Efficiency Analysis ◽  
Open Circuit ◽  
Local Defect ◽  
Whole Cell ◽  
Local Efficiency ◽  
Cell Efficiency ◽  
Lock In ◽  
Efficiency Data

Abstract The electronic properties of solar cells, particularly multicrystalline silicon-based ones, are distributed spatially inhomogeneous, where regions of poor quality may degrade the performance of the whole cell. These inhomogeneities mostly affect the dark current-voltage (I-V) characteristic, which decisively affects the efficiency. Since the grid distributes the local voltage homogeneously across the cell and leads to lateral balancing currents, local light beam-induced current methods alone cannot be used to image local cell efficiency parameters. Lock-in thermography (LIT) is the method of choice for imaging inhomogeneities of the dark I-V characteristic. This contribution introduces a novel method for evaluating a number of LIT images taken at different applied biases. By pixel-wise fitting the data to a two diode model and taking into account local series resistance and short circuit current density data, realistically simulated images of the other cell efficiency parameters (open circuit voltage, fill factor, and efficiency) are obtained. Moreover, simulated local and global dark and illuminated I-V characteristics are obtained, also for various illumination intensities. These local efficiency data are expectation values, which would hold if a homogeneous solar cell had the properties of the selected region of the inhomogeneous cell. Alternatively, also local efficiency data holding for the cell working at its own maximum power point may be generated. The amount of degradation of different cell efficiency parameters in some local defect positions is an indication how dangerous these defects are for degrading this parameter of the whole cell. The method allows to virtually 'cut out' certain defects for checking their influence on the global characteristics. Thus, by applying this method, a detailed local efficiency analysis of locally inhomogeneous solar cells is possible. It can be reliably predicted how a cell would improve if certain defects could be avoided. This method is implemented in a software code, which is available.

scholarly journals Theoretical and experimental assessment of thinned germanium substrates for III–V multijunction solar cells

2020 ◽  
Vol 28 (11) ◽  
pp. 1097-1106
Author(s):  
Iván Lombardero ◽  
Mario Ochoa ◽  
Naoya Miyashita ◽  
Yoshitaka Okada ◽  
Carlos Algora
Keyword(s):  
Solar Cells ◽  
Experimental Assessment ◽  
Multijunction Solar Cells ◽  
Germanium Substrates

Growth aspects of AlGaAs/GaAs tunnel diodes for multijunction solar cells

2005 ◽  
Vol 40 (10-11) ◽  
pp. 1039-1042 ◽  
Author(s):  
G. Timò ◽  
C. Flores ◽  
R. Campesato
Keyword(s):  
Solar Cells ◽  
Tunnel Diodes ◽  
Multijunction Solar Cells

Development of germanium-on-germanium engineered substrates for III-V multijunction solar cells

2020 ◽  
Author(s):  
Guillaume Courtois ◽  
Rufi Kurstjens ◽  
Jinyoun Cho ◽  
Kristof Dessein ◽  
Ivan Garcia ◽  
...  
Keyword(s):  
Solar Cells ◽  
Multijunction Solar Cells ◽  
Engineered Substrates
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