Accurate extraction of the series resistance of aluminum local back surface field silicon wafer solar cells

AbstractThis paper identifies some mechanisms that lead to problems in back Al contact formation. Major issues are related to a basic problem that the Al melt has a large surface tension and tries to ball up during the firing step. Other issues arise from dissolution of the Si-Al interface and entrapment of glass within the Si-Al alloy. Si diffusion into Al can be applied to control the melt, while cooling rate can help improve the structure of various regions of the back contact for a favorable series resistance. We also discuss a modified time-temperature profile that can lead to a deep and uniform back-surface field.

Download Full-text

Rear-Side Contact Opening by Laser Ablation for Industrial Screen-Printed Aluminium Local Back Surface Field Silicon Wafer Solar Cells

Energy Procedia ◽

10.1016/j.egypro.2012.07.003 ◽

2012 ◽

Vol 25 ◽

pp. 19-27 ◽

Cited By ~ 14

Author(s):

Zheren Du ◽

Natalia Palina ◽

Jia Chen ◽

Minghui Hong ◽

Bram Hoex

Keyword(s):

Solar Cells ◽

Laser Ablation ◽

Silicon Wafer ◽

Back Surface ◽

Rear Side ◽

Back Surface Field ◽

Surface Field ◽

Screen Printed

Download Full-text

Investigation of Screen-Printed Rear Contacts for Aluminum Local Back Surface Field Silicon Wafer Solar Cells

IEEE Journal of Photovoltaics ◽

10.1109/jphotov.2013.2239701 ◽

2013 ◽

Vol 3 (2) ◽

pp. 690-696 ◽

Cited By ~ 8

Author(s):

Jia Chen ◽

Zhi Hao Joseph Tey ◽

Zhe Ren Du ◽

Fen Lin ◽

Bram Hoex ◽

...

Keyword(s):

Solar Cells ◽

Silicon Wafer ◽

Back Surface ◽

Back Surface Field ◽

Surface Field ◽

Screen Printed

Download Full-text

Crystalline Fraction and Doping Concentration Effect on Heterojunction Solar Cells n-Doped μc-Si:H Back Surface Field Layer

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2015.10242 ◽

2015 ◽

Vol 15 (3) ◽

pp. 2294-2299 ◽

Cited By ~ 2

Author(s):

Sangho Kim ◽

Chonghoon Shin ◽

Nagarajan Balaji ◽

Junsin Yi

Keyword(s):

Solar Cells ◽

Doping Concentration ◽

Concentration Effect ◽

Back Surface ◽

Crystalline Fraction ◽

Back Surface Field ◽

Heterojunction Solar Cells ◽

Field Layer ◽

Surface Field

Download Full-text

Numerical Investigation of Graphene as a Back Surface Field Layer on the Performance of Cadmium Telluride Solar Cell

Molecules ◽

10.3390/molecules26113275 ◽

2021 ◽

Vol 26 (11) ◽

pp. 3275

Author(s):

Devendra KC ◽

Deb Kumar Shah ◽

M. Shaheer Akhtar ◽

Mira Park ◽

Chong Yeal Kim ◽

...

Keyword(s):

Solar Cells ◽

Solar Cell ◽

Doping Concentration ◽

Carrier Lifetime ◽

Short Circuit ◽

Back Surface ◽

Back Surface Field ◽

Cdte Solar Cell ◽

Cdte Solar Cells ◽

Surface Field

This paper numerically explores the possibility of ultrathin layering and high efficiency of graphene as a back surface field (BSF) based on a CdTe solar cell by Personal computer one-dimensional (PC1D) simulation. CdTe solar cells have been characterized and studied by varying the carrier lifetime, doping concentration, thickness, and bandgap of the graphene layer. With simulation results, the highest short-circuit current (Isc = 2.09 A), power conversion efficiency (h = 15%), and quantum efficiency (QE ~ 85%) were achieved at a carrier lifetime of 1 × 103 ms and a doping concentration of 1 × 1017 cm−3 of graphene as a BSF layer-based CdTe solar cell. The thickness of the graphene BSF layer (1 mm) was proven the ultrathin, optimal, and obtainable for the fabrication of high-performance CdTe solar cells, confirming the suitability of graphene material as a BSF. This simulation confirmed that a CdTe solar cell with the proposed graphene as the BSF layer might be highly efficient with optimized parameters for fabrication.

Download Full-text