Impact of CdTe surface composition on doping and device performance in close Space sublimation deposited CdTe solar cells

2011 ◽  
pp. n/a-n/a ◽  
Author(s):  
J. D. Major ◽  
Y. Y. Proskuryakov ◽  
K. Durose
Keyword(s):  
Solar Cells ◽  
Surface Composition ◽  
Device Performance ◽  
Cdte Solar Cells ◽  
Close Space Sublimation ◽  
Space Sublimation ◽  
Cdte Surface

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

Controlling Band Alignment at the Back Interface of Cadmium Telluride Solar Cells using ZnTe and Te Buffer Layers

MRS Advances ◽  
2019 ◽  
Vol 4 (16) ◽  
pp. 913-919 ◽  
Author(s):  
Fadhil K. Alfadhili ◽  
Adam B. Phillips ◽  
Geethika K. Liyanage ◽  
Jacob M. Gibbs ◽  
Manoj K. Jamarkattel ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Critical Role ◽  
Open Circuit ◽  
Band Alignment ◽  
Buffer Layers ◽  
Device Performance ◽  
Band Bending ◽  
Cdte Solar Cells ◽  
Hole Current

ABSTRACTFormation of a low barrier back contact plays a critical role in improving the photoconversion efficiency of the CdTe solar cells. Incorporating a buffer layer to minimize the band bending at the back of the CdTe device can significantly lower the barrier for the hole current, improving open circuit voltage (VOC) and the fill factor. Over the past years, researchers have incorporated the both ZnTe and Te as buffer layers to improve CdTe device performance. Here we compare device performance using these two materials as buffer layers at the back of CdTe devices. We show that using Te in contact to CdTe results in higher performance than using ZnTe in contact to the CdTe. Low temperature current density-voltage measurements show that Te results is a lower barrier with CdTe than ZnTe, indicating that Te has better band alignment, resulting in less downward bending in the CdTe at the back interface, than ZnTe does.

scholarly journals 12% efficient CdTe/CdS thin film solar cells deposited by low-temperature close space sublimation

2011 ◽  
Vol 110 (6) ◽  
pp. 064508 ◽  
Author(s):  
Judith Schaffner ◽  
Markus Motzko ◽  
Alexander Tueschen ◽  
Andreas Swirschuk ◽  
Hermann-Josef Schimper ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Low Temperature ◽  
Thin Film Solar Cells ◽  
Close Space Sublimation ◽  
Cds Thin Film ◽  
Space Sublimation
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