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.79900439nas a2200121   4500008004100000245009300041210006900134300001000203100002800213700001500241700001700256856004400273       2001                        eng d00aA New Generalized Detailed Balance Formulation to Calculate Solar Cell Efficiency Limits0 aNew Generalized Detailed Balance Formulation to Calculate Solar   a22-261 aHonsberg, Christiana, B1 aCorkish, R1 aBremner, S P  uhttps://www.pveducation.org/es/node/329