02010nas a2200145   4500008004100000245010900041210006900150300001400219490000700233520152700240100001701767700001401784700002801798856003801826       2008                        eng d00aAnalysis of tandem solar cell efficiencies under {AM1.5G} spectrum using a rapid flux calculation method0 aAnalysis of tandem solar cell efficiencies under AM15G spectrum   a225–2330 v163 a<p> We report the use of a rapid flux calculation method using incomplete Riemann zeta functions as a replacement for the {Bose-Einstein} integral in detailed balance calculations to study the efficiency of tandem solar cell stacks under the terrestrial {AM1.5G} spectrum and under maximum concentration. The maximum limiting efficiency for unconstrained and constrained tandem stacks of up to eight solar cells, under the {AM1.5G} spectrum and maximum concentration, are presented. The results found agree well with previously published results with one exception highlighting the precautions necessary when calculating for devices under the {AM1.5G} spectrum. The band gap sensitivities of two tandem solar cell stack arrangements of current interest were also assessed. In the case of a three solar cell tandem stack the results show a large design space and illustrate that the constrained case is more sensitive to band gap variations. Finally, the effect of a non-optimum uppermost band gap in a series constrained five solar cell tandem stack was investigated. The results indicate that a significant re-design is only required when the uppermost band gap is greater than the optimum value with a relatively small effect on the limiting efficiency. It is concluded that this rapid flux calculation method is a powerful tool for the analysis of tandem solar cells and is particularly useful for the design of devices where optimum band gaps may not be available. Copyright &copy; 2007 John Wiley &amp; Sons, Ltd.</p>1 aBremner, S P1 aLevy, M Y1 aHonsberg, Christiana, B  uhttp://dx.doi.org/10.1002/pip.79900454nas a2200121   4500008004100000245011000041210006900151300001400220490000700234100001400241700002800255856004900283       2006                        eng d00aRapid and precise calculations of energy and particle flux for detailed-balance photovoltaic applications0 aRapid and precise calculations of energy and particle flux for d  a1400-14050 v501 aLevy, M Y1 aHonsberg, Christiana, B  uhttps://www.pveducation.org/zh-hans/node/343