CdTe appears to be less toxic than elemental cadmium, at least in terms of… The issue about regulating the use of CdTe is currently being discussed in Europe. Availability This crystalline compound is mainly used as a solar-cell material and an infrared optical window. exposed to Cd. It has the greatest electro-optic coefficient of the linear electro-optic effect among II-VI compound crystals (r41=r52=r63=6.8×10−12 m/V). “Cadmium? In 2011, around 2 GWp of CdTe solar cells were produced; For more details and discussion see cadmium telluride photovoltaics. Cadmium (Cd) is a toxic heavy metal and considered a perilous substance. Mercury cadmium telluride: Class: Small Molecule: Description: Mercury cadmium telluride is an alloy of mercury telluride and cadmium telluride. The main reason why the PV market is not considering this a good material for photovoltaic technology. In the presence of tellurium, however, cadmium forms a crystalline lattice that is highly stable (high boiling point, low vapor pressure, low solubility). Policy & regulation are aligning with renewables cost declines to make projects more profitable and portfolios more sustainable. CdTe has low acute inhalation, oral, and aquatic toxicity, and is negative in the Ames mutagenicity test. The cadmium telluride CdTe QDs were made by combination two chemical solutions of molarities 0.02 M. The first solution was arranged by dissolving 0.092 g of CdCl 2 in 50 ml distilled water, while the second solution was succeeded by dissolving 0.033 g from sodium telluride … General information; Classification & Labelling & PBT assessment; Manufacture, use & exposure It does not dissolve in water. CdTe can be alloyed with mercury to make a versatile infrared detector material (HgCdTe). General information; Classification & Labelling & PBT assessment; Manufacture, use & exposure Cadmium telluride is a black solid. Cadmium is used extensively in electroplating, although the nature of the operation does not generally lead to overexposure. CAS number: 1306-25-8. CdTe is still a potentially toxic material. tellanylidenecadmium. Listeners Choose the Top Energy Storylines of 2020, Why 'Too Much' Wind and Solar Is a Feature, Not a Bug, The Surprising Ways America Can Hit Net-Zero Emissions by 2050, First Solar’s cost-effective and efficient, California Sets $200M Budget for ‘Complex, Multi-Property Microgrid’ Projects, New York City’s Biggest Power Producer Aims to Import Renewable Energy From Upstate, Massachusetts Gov. Applications Free intelligence and insights from industry experts and leading companies on the global energy transformation. For firefighters answering such a call, the biggest danger is the electricity, he said, which they are trained to deal with. Ingestion may cause nausea, salivation, vomiting and diarrhea. Mercury is a heavy, silvery d-block metal and one of six elements that are liquid at or near room temperature and pressure. Bulk CdTe is transparent in the infrared, from close to its band gap energy (1.5 eV at 300 K, which corresponds to infrared wavelength of about 830 nm) out to wavelengths greater than 20 µm; correspondingly, CdTe is fluorescent at 790 nm. Cadmium is toxic, but all the approximately 7 grams of cadmium in one CdTe panel is in the form of a chemical compound cadmium telluride, 23 which has 1/100 th the toxicity of free cadmium. 24 Cadmium telluride is a very stable compound that is non-volatile and non-soluble in water. CdTe is used to make thin film solar cells, accounting for about 8% of all solar cells installed in 2011. Ingestion or inhalation of cadmium/cadmium compounds may be fatal. Cadmium telluride is a black solid. In this study, whole-transcriptome sequencing was performed to analyze the changes in genome-wide gene expression pattern of rat hippocampus after treatments of cadmium telluride (CdTe) QDs with two sizes to understand better the mechanisms of CdTe QDs causing toxic effects in the CNS. Solar energy purveyors are adopting a similar approach with cadmium-telluride thin-film modules. It’s harmful if swallowed, and is very toxic to aquatic life. Cadmium telluride (CdTe) thin films are made of cadmium, which is a toxic, expensive, cancer-causing heavy metal. Exposure can cause lung, kidney or liver pathology or failure. “I majored in common sense,” one email correspondent noted, admitting to no scientific education. CdTe alloyed with a small amount of zinc makes an excellent solid-state X-ray and gamma ray detector (CdZnTe). CdTe thin-film solar cells can be manufactured quickly and inexpensively, providing a lower-cost alternative to conventional silicon-based technologies. During their operation, these modules do not produce any pollutants, and, furthermore, by displacing fossil fuels, they offer great environmental benefits. Based on notification of these results to the European Chemicals Agency(ECHA), CdTe is no longer classified as harmful if ingested nor harmful in contact with skin, and the toxicity classification to aquatic life has been reduced… without appropriate gloves and other safety precautions). And First Solar’s real-world experience with the panels, he added, is even less than that. Cadmium telluride is a chemical compound. Another study shows that CdTe PV recycling will add a significant secondary resource of Te which, in conjunction with improved material utilization, will enable a cumulative capacity of about 2 TW by 2050 and 10 TW by the end of the century. The accelerated life cycle testing, another pointed out, covered only ten years. The compound CdTe has different qualities than the two elements, cadmium and tellurium, taken separately. Cadmium telluride (CdTe) thin films are made of cadmium, which is a toxic, expensive, cancer-causing heavy metal. But the way it is encapsulated in glass in First Solar panels, Sinha said, sharply limits the possibility of inhalation or ingestion exposure. CdTe can operate at room temperature allowing the construction of compact detectors for a wide variety of applications in nuclear spectroscopy. Once absorbed, Cd is efficiently retained in the human body, in which it accumulates throughout life. The Grid Edge comprises technologies, solutions and business models advancing the transition toward a decentralized, distributed and transactive electric grid. Toxicology assessment The compound CdTe has different qualities than the two elements, cadmium and tellurium, taken separately. In addition, AVSR1 is already providing 200 full-time construction jobs, a number that will soon go to 350, in a region where unemployment has been 15 percent. “But 0.4 percent times 3.7 million could be a lot,” a local councilman pointed out, suggesting such a volume of cadmium fumes could make the air toxic or leach into the ground water. Cadmium is toxic, but all the approximately 7 grams of cadmium in one CdTe panel is in the form of a chemical compound cadmium telluride, 23 which has 1/100 th the toxicity of free cadmium. This was little comfort to those who remained dubious. “The semiconductor material is bonded to a sheet of glass under very high temperature,” Sinha explained. Acute toxicity testing were carried out the freshwater swamp shrimp, Macrobrachium nipponense, as the model animal for the semiconductor applied metals (gallium, antimony, indium, cadmium, and copper) to evaluate if the species is an suitable experimental animal of pollution in aquatic ecosystem. Others seemed convinced. AVSR1’s neighbors next raised questions about unexpected events, like a lightning strike or the crash of a flight from nearby Edwards Air Force Base. CAS# ... Hydrogen telluride is highly toxic and has caused pulmonary irritation and hemolysis of red blood cells in animals; this gas is very unstable, however, and its occurrence as an actual industrial hazard is unlikely. It is one of the best things. Exposure can cause lung, kidney or liver pathology or failure. Toxicity. IUPAC names. Cadmium telluride is toxic if ingested, if its dust is inhaled, or if it is handled improperly (i.e. It is usually sandwiched with cadmium sulfide to form a p-n junction solar PV cell. Cadmium Telluride Identification. Translated names. The record efficiency for a laboratory CdTe solar cell is 22.1% by First Solar, while First Solar recently reported its a… Cadmium telluride (CdTe) solar cells have quietly established themselves as a mass market PV technology. Cadmium telluride, while considered less dangerous in relation to acute exposure, is toxic if ingested, improperly handled or the dust inhaled. Acute toxicity testing were carried out the freshwater swamp shrimp, Macrobrachium nipponense, as the model animal for the semiconductor applied metals (gallium, antimony, indium, cadmium, and copper) to evaluate if the species is an suitable experimental animal of pollution in aquatic ecosystem. CdTe is insoluble in water. © 2021 Greentech Media or its affiliated companies. In tests at up to 1,100 degrees Celsius, he added, the CdTe migrated into the heat-softened glass and was encapsulated. “Like the MBTE problem,” another councilman added. As a result, there is a low supply of this material. It can be made into nanocrystals. Cadmium is very toxic and its compounds are classified as harmful (such as cadmium telluride), toxic (eg cadmium sulphide) or very toxic (cadmium oxide); there is also a reasonable suspicion of a carcinogenic effect in humans. CdTe has low acute inhalation, oral, and aquatic toxicity, and is negative in the Ames mutagenicity test. Cadmium telluride is commercially available as a powder, or as crystals. The compound CdTe has different qualities than the two elements, cadmium and tellurium, taken separately. Toxicology assessment . CdTe is used as an infrared optical material for optical windows and lenses and is proven to provide a good performance across a wide range of temperatures. According to cancer biologist David H. Nguyen, PhD, toxic chemicals in solar panels include cadmium telluride, copper indium selenide, cadmium gallium (di)selenide, copper indium gallium (di)selenide, hexafluoroethane, lead, and polyvinyl fluoride. Cadmium telluride[edit]. Cadmium is a heavy metal and extremely dangerous. But the way it is encapsulated in glass in First Solar panels, Sinha said, sharply limits the possibility of inhalation or ingestion exposure. Cadmium can be rinsed into the water table during the production process. without appropriate gloves and other safety precautions). China, South Korea, and Japan are the leading producers of cadmium in the world, followed by North America. Nguyen KC(1), Rippstein P(2), Tayabali AF(2), Willmore WG(3). CdTe Quantum Dots have the widest wavelength range reaching sizes as small as less then 500 nm; within the range sufficient to emit light in the blue-white range. Once properly and securely captured and encapsulated, CdTe used in manufacturing processes may be rendered harmless. But Antelope Valley residents, who know their desert to be a rare and daunting place, were not convinced even when Sinha talked about the accelerated life cycle testing the panels are subjected to and the international certifications they have earned. We curate our best reporting on the most salient trends in the industry. Mitochondrial Toxicity of Cadmium Telluride Quantum Dot Nanoparticles in Mammalian Hepatocytes. : 76337 Appearance: Black, solid (powder > 75 μm) Production date: March 2008 Receipt Date: 08 April 2008 Expiry Date: 6 months after opening. The compound CdTe has different qualities than the two elements, cadmium and tellurium, taken separately. Cadmium Telluride is highly toxic as it contains cadmium. Other . It can be made into nanocrystals. The company Solyndra, now bankrupt, was one of the few companies that attempted to bring CIGS cells into mainstream use. 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