A thin layer of CdS of about 200 Å enhances the solar conversion efficiency of CdS/CdTe solar cells from 8% to 15%. A similar enhancement of the efficiency is observed on other solar cells, based on CuInSe2 or si. Since the early 1950's, cadmium telluride has been known as a good candidate for solar cells. Since the replacement of CdS with other compounds was unsuccessful, it became important to find out why CdS is so beneficial. All earlier attempts of explanation had f. Compared with the classical silicon solar cells, these CdS/CdTe or other CdS/CIS type solar cells have a somewhat smaller conversion efficiency but a substantially lower material el. Cadmium is one of the most toxic metals and has long ago been banned for use as sulfide or selenide in the pigments of paint. Its use was consequently banned by the European Union'. Up to the writing of this paper, more than 2 GW of CdS/CdTe panels have been deployed, the latest part of it from First Solar: 40 MW at Waldpolenz in Germany at a price of €3250.
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Can cadmium sulfide be used as a buffer layer in CdTe solar cells?
The response of light illumination on the photocurrent is measured and analyzed. The effect of deposition This work is aimed at investigating the viability of utilizing cadmium sulfide (CdS) as a buffer layer in CdTe solar cells by analyzing and assessing its optical, photoluminescence, morphological,
Does cadmium sulfide increase conversion efficiency?
A decade later it was observed that a layer of cadmium sulfide on top could increase the conversion efficiency from about 5% to about 8% , , , . Only in the 1980's were solar cells made by close spaced sublimation of a CdS/CdTe sandwich that achieved 12% conversion efficiency .
What is cadmium sulfide used for?
Cadmium sulfide is extensively being studied in the field of as photocatalytic and electrocatalytic water-splitting, photocatalytic reduction of CO 2 reduction, photoelectrochemical water splitting and also used in solar cells , , .
Why is cadmium banned in solar cells?
Cadmium is one of the most toxic metals and has long ago been banned for use as sulfide or selenide in the pigments of paint. Its use was consequently banned by the European Union's RoHS regulation. Consequently, the use in solar cells is subject to stringent recycling procedures 5.
Is cadmium telluride a good candidate for solar cells?
Since the early 1950's, cadmium telluride has been known as a good candidate for solar cells since it could be doped n - and p -type and its band gap at 1.45 eV is close to optimal for solar energy conversion, .
Conclusion and Prespective Properties of cadmium sulfide such as low band gap of 2.4 eV, stability, porosity, compatibility, permeability and inexpensive abundant nature makes it unique and superior for applications for photocatalytic and electrocatalytic processes.