Archive for the HEMS Category

Suppliers of high purity hydrogen generally provide a certificate of analysis (CoA) with each shipment. A CoA will typically call out several impurities, eg. O2, H2O, N2, CO, CO2, CH4 , etc . As most analytical instruments can only detect

Hydrogen is used in the production of polysilicon manufactured in fluidized bed reactors (FBR) from silane (SiH4) gas. In order to meet the purity requirements of the solar industry, polysilicon manufacturers must use ultra-pure starting materials including Hydrogen. Power+Energy HEMS

The Society of Automotive Engineers (SAE) has developed a specification for hydrogen intended for use in a PEM fuel cell in a motor vehicle, SAE J2719.  This same specification has been adopted internationally by the International Standards Organization (ISO).  Importantly

High-purity Hydrogen is used as a carrier gas to transport metal organic source chemicals into the MOCVD reaction chamber. Power devices are either Gallium Nitride (GaN) or Silicon Carbide (SiC) devices. The performance of GaN devices vary depending on the quantity

Similar to other thin-film manufacturing processes, pure hydrogen is used in combination with silane and with dopant gases in the production of thin-film-transistor liquid crystal display (TFT LCD) panels. Consistent control of impurities is required to ensure the high yields

Hydrogen features in a number of sensitive semiconductor processes where the control of impurities into the sub part-per-billion (ppb) range has a critical impact on device function or yield.  Power+Energy suggest using HEMS™ instruments to verify hydrogen purity prior to

Hydrogen is used in combination with silane to produce amorphous and micro-crystaline silicon layers during the thin film silicon photovoltaic manufacturing process. The electrical output of the resulting solar cell, its efficiency and its lifetime are all affected by the

Hydrogen is used as a carrier gas to transport metal organic source chemicals into the MOCVD reaction chamber. High Brightness LEDs are typically Gallium Nitride (GaN) devices. The performance of a GaN device can vary depending on the oxygen impurity