Double Sided (D. S.) Solar Cells to Improve Static Concentration

Photovoltaic Concentrators

“…The Spanish group at the Polytechnic University of Madrid, headed by Professor A. Luque, developed since 1975 bifacial cells for static concentrators, in order to achieve more concentration in static concentrators of the CPC type in Figure 11.5. Three different cell approaches were investigated with the support of the Spanish funding Agency CAICYT: a vertical multijunction cell, similar to the one developed in the United States by Sater and Brandhorst [36], and two more original structures, one n + pn + interdigitated in the back [37] and another one n + pp + [38], were examined and the latter was retained as the most promising and commercialized by the start-up Isofotón, today the seventh world cells manufacturer. 12 The retained cell structure was based on the long base lifetime found in lowly doped silicon.…”

Analytical treatment of Trivich–Flinn and Shockley–Queisser photovoltaic efficiency limits using polylogarithms

“…(31). This approximation has been shown to work well with conventional cell analysis [16,17]. It will locate a voltage V * m on the output curve close to V m to give essentially the same, but slightly less, power output, where…”

Optimum Basethickness Determination of a Backilluminated Silicon Solar Cell: Irradiation Effect

“…101 Theory: Minority carrier density: Figure 1 shows an (n+/p/p+) silicon solar cell [5], [9], [10],back surface illuminated [11], [12](double side surface field) with polychromatic light and submitted to irradiation [13] [14] [15]. The continuity equation governing the excess minority carrier'sphenomena i.e.…”

“…Then when Sf increases, the photocurrent increases until reaching a plateau, which corresponds to the short circuit currentregardless of the flow of irradiation, its intensity or the thickness of the base. The short circuit current increases with both the intensity of irradiation and the base thickness and decreases with the irradiation flux.The expression of Sb is then deduced by deriving equation(9) of the photocurrent density whatever (fp, kl, and H) with respect to Sf and at large Sf ranges[3…”