Expanded experimental space for luminescence studies of thin film CdS/CdTe solar cells

ABSTRACTWe have explored a large range of experimental space for photoluminescence (PL) and electroluminescence (EL) measurements of CdS/CdTe solar cells. This space includes changes in temperature, injection intensity (laser power for PL, current for EL), electrical bias for PL, and laser energy for PL. Measurements were resolved both spectrally and spatially (2D for EL, 1D for PL). Combination of EL and PL measurements revealed that most spatial inhomogeneity was the result of non-uniform current transport rather than local variations in recombination rate. The greatest spectral resolution was obtained with low temperature EL at low injection rates. High injection EL as well as high forward biased PL suppressed band-edge emission at low temperatures. Spectral structure was found to be greater in EL than in PL. These effects likely originated from preferential current transport along grain boundaries and/or certain grains.

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Regimes of current transport mechanisms in CdS/CdTe solar cells

Semiconductor Science and Technology ◽

10.1088/1361-6641/ab23b5 ◽

2019 ◽

Vol 34 (7) ◽

pp. 075013 ◽

Cited By ~ 2

Author(s):

H Bayhan ◽

E T Dağkaldıran ◽

J D Major ◽

K Durose ◽

M Bayhan

Keyword(s):

Solar Cells ◽

Current Transport ◽

Transport Mechanisms ◽

Cdte Solar Cells

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

IEEE Journal of Photovoltaics ◽

10.1109/jphotov.2018.2869545 ◽

2018 ◽

Vol 8 (6) ◽

pp. 1767-1772 ◽

Cited By ~ 3

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

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Twin boundaries enhanced current transport in 14.4%-efficient CdTe solar cells by RF sputtering

2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC) ◽

10.1109/pvsc.2015.7356438 ◽

2015 ◽

Author(s):

Hui Li ◽

Xiangxin Liu ◽

Zhongming Du ◽

Biao Yang

Keyword(s):

Solar Cells ◽

Rf Sputtering ◽

Current Transport ◽

Twin Boundaries ◽

Cdte Solar Cells

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Simulation of Current Transport in Polycrystalline CdTe Solar Cells

Journal of Electronic Materials ◽

10.1007/s11664-013-2702-0 ◽

2013 ◽

Vol 42 (11) ◽

pp. 3175-3180 ◽

Cited By ~ 8

Author(s):

F. Troni ◽

R. Menozzi ◽

E. Colegrove ◽

C. Buurma

Keyword(s):

Solar Cells ◽

Current Transport ◽

Cdte Solar Cells

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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.

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