A thin silicon solar cell having a back dielectric passivation and rear contact with local back surface field is described. The tubular connector includes first and second radial projections that are spaced apart along an axial direction of the tubular connector. Moreover, a user may interact with the designated content in the document such that, upon user activation, the preview manager process renders a preview configuration that displays a simulation of the resultant application of the redaction function to the designated content. A spectrometer converts the reflected radiation to a spectral signal.