Assessment of Photovoltaic Junction Position in CdTe Solar Cells Using a Combined FIB-EBIC Technique

2012 ◽  
Vol 1432 ◽  
Author(s):  
Jonathan D. Major ◽  
Leon Bowen ◽  
Robert E. Treharne ◽  
Ken Durose
Keyword(s):  
Solar Cells ◽  
Secondary Electron ◽  
Ion Beam ◽  
Rf Sputtering ◽  
Cdte Solar Cells ◽  
Close Space Sublimation ◽  
Focussed Ion Beam ◽  
Electron Beam Induced Current ◽  
Space Sublimation

ABSTRACTTwo issues relating to the determination of junction position in thin film CdTe solar cells have been investigated. Firstly, the use of a focussed ion beam (FIB) milling as a method of sample preparation for electron beam induced current (EBIC) analysis is demonstrated. It is superior to fracturing methods. High quality secondary electron and combined secondary electron/EBIC images are presented and interpreted for solar cells with CdTe layers deposited by both close space sublimation (CSS) or RF sputtering. Secondly, it was shown that in an RF-sputtered CdTe device, while the photovoltaic junction was buried ~1.1 μm from the metallurgical interface, the shape of the external quantum efficiency (EQE) curve did not indicate the presence of a buried homo-junction. SCAPS modelling was used to verify that EQE curve shapes are not sensitive to junctions buried < 1.5μm from the CdTe/CdS interface.

scholarly journals Single vacuum chamber with multiple close space sublimation sources to fabricate CdTe solar cells

2016 ◽  
Vol 34 (2) ◽  
pp. 021202 ◽  
Author(s):  
Drew E. Swanson ◽  
Jason M. Kephart ◽  
Pavel S. Kobyakov ◽  
Kevin Walters ◽  
Kevan C. Cameron ◽  
...  
Keyword(s):  
Solar Cells ◽  
Vacuum Chamber ◽  
Cdte Solar Cells ◽  
Close Space Sublimation ◽  
Space Sublimation

scholarly journals Analysis of electrical property parameters of CdS/CdTe solar cells fabricated by close space-sublimation

2013 ◽  
Vol 62 (18) ◽  
pp. 188801
Author(s):  
Zhao Shou-Ren ◽  
Huang Zhi-Peng ◽  
Sun Lei ◽  
Sun Peng-Chao ◽  
Zhang Chuan-Jun ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electrical Property ◽  
Cdte Solar Cells ◽  
Close Space Sublimation ◽  
Space Sublimation

Determination of Series Resistance in CdSeTe/CdTe Solar Cells by the Jsc–Voc Method

2020 ◽  
Author(s):  
Carey Reich ◽  
Arthur Onno ◽  
Alexandra Bothwell ◽  
Anna Kindvall ◽  
Zachary Holman ◽  
...  
Keyword(s):  
Solar Cells ◽  
Series Resistance ◽  
Cdte Solar Cells

Effects of Magnetic Field Configuration on Rf Sputtering for CdS/CdTe Solar Cells

1996 ◽  
Vol 426 ◽  
Author(s):  
A. Compaan ◽  
M. Shao ◽  
A. Fischer ◽  
D. Grecu ◽  
U. Jayamaha ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Cells ◽  
Film Growth ◽  
Rf Sputtering ◽  
Field Configuration ◽  
Electrical Performance ◽  
Magnetic Field Configuration ◽  
Growth Interface ◽  
Cdte Solar Cells ◽  
Planar Magnetron

AbstractWe report studies of solar cells prepared by rf planar magnetron sputtering in which the films were deposited using magnetic field structures ranging from approximately balanced to strongly unbalanced in the “type II” configuration. For films grown with the unbalanced configurations, we find much stronger photoluminescence and much better cell performance than for the balanced configuration. The CdTe films show differences in electrical performance depending on magnetic field as well. These effects are interpreted as arising from the enhanced electron and ion bombardment of the film growth interface for the unbalanced magnetrons. Using two unbalanced magnetrons we have fabricated an all-rf-sputtered cell with NREL-verified efficiency of 11.66% at air mass 1.5 illumination.

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