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Low-cost high efficiency solar cells are the key to achieving grid parity with photovoltaic devices. This paper details the fabrication, characterization and analysis of 4 cm2 screen printed cells with efficiency over 20% achieved using a local back surface field cell structure in conjunction with a 75 ohm/sq emitter and efficient back surface reflector. A streamlined process sequence involving a...
This paper reports on the characteristics of a negatively charged spin-on dielectric which has been used as the rear surface passivation layer to achieve 20% efficient screen-printed boron back surface field (B-BSF) solar cells. Solar cell schemes which utilize a heavily doped boron back surface field often face the challenges of avoiding wafer contamination during a long, high-temperature diffusion...
We demonstrate electrical properties of rare earth (RE)-doped HfO2 and ZrO2 for application as higher permittivity (k) dielectrics in logic and memory devices. X-ray diffraction (XRD) results show that Dy, Er, and Gd doping stabilizes the higher-k tetragonal phase rather than the lower-k monoclinic phase. This preferred tetragonal phase results in a k~30. Initial electrical results show ~3 nm higher-k...
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