About The principle of power generation of cdte compound solar cells
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6 FAQs about [The principle of power generation of cdte compound solar cells]
How CdTe/CdS solar cell was developed?
Sequential developments of CdTe solar cell. The 1st CdTe/CdS solar cell was developed by a thin-film graded gap and a 3-step process, including high-temperature vapor phase deposition (VPD) for p-CdTe and high vacuum evaporation for the n-CdS film.
What is a CdTe/CdS solar cell?
The 1st CdTe/CdS solar cell was developed by a thin-film graded gap and a 3-step process, including high-temperature vapor phase deposition (VPD) for p-CdTe and high vacuum evaporation for the n-CdS film. A ceramic thin-film (20 μ m) was fabricated by a screen printing technique that showed a 0.2 Ω-cm resistivity.
How efficient are CdS/CdTe heterojunction solar cells?
Although the exploration of CdS/CdTe heterojunction solar cells started in the early 1970s with an efficiency of around 6%, the current efficiency of the CdTe solar cell has reached 22.1% (First Solar Inc.), the leading CdTe thin film-based PV manufacturing company.
Are CdTe heterostructure solar cells able to exceed the voltage barrier?
Now, writing in Nature Energy, Wyatt Metzger and colleagues 5, from the National Renewable Energy Laboratory, University of Tennessee and Washington State University, have reported CdTe heterostructure solar cells that have exceeded the voltage barrier of 1 V and set a new record value of 1.017 V.
How to produce highly efficient CdTe solar cells?
In order to obtain highly efficient CdTe solar cells, a heat treatment of the CdS/CdTe stack in a chlorine containing ambient is mandatory. This annealing treatment is commonly referred to as CdCl 2 -treatment or activation treatment. The treatment is crucial for highly efficient CdTe solar cells produced with any method.
What is the absorption coefficient of CdTe based solar cells?
In CdTe compound semiconductor-based solar cells CdTe is the absorbing material with direct energy bandgap of 1.49 eV at 300K [ 4] and an absorption coefficient larger than 10 4 cm −1 for photons with energy above the bandgap [ 5 ].
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