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Thin film modules: Thin film modules are built out by laying photovoltaic material in one or more layers on a supporting material such as glass, plastic, or metal. Thin film modules come in various types with Cadmium-Telluride (CdTe) Being the most common. CdTe modules contain far less aluminum and more glass than Crystalline silicon modules (average by weight): 97% glass (panel surface), ~3% polymer (junction boxes and sealant) and negligible amounts of semiconductors and metals. [1] Thin film modules are far less efficient than crystalline silicon modules at around 9% efficiency, but significantly cheaper.
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