Optical and electrical simulations of two-junction III-V nanowires on Si solar cell

A coupled optoelectronic simulation was used to theoretically assess the performance of core-shell GaInP nanowires array (NWA)/Si thin-film two-junction solar cell. Outstanding light harvesting rooted from the strong light trapping and the formation of Fabry-Perot optical cavity in the NWA enables the cell to produce high photocurrent. From the detailed balance calculation, above 32% of efficiency could be obtained at the current matching geometries. Coupled optoelectronic simulation shows that current matching can be easily achieved even under relatively high recombination rate. A promising efficiency of 27.1% is obtained for the proposed cell with appropriate nanowires surface passivation. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4788750]

采用耦合光电模拟从理论上评估了核壳结构的GaInP纳米线阵列（NWA）/Si薄膜双结太阳能电池的性能。源于纳米线阵列中强光捕获以及法布里 - 珀罗光学腔形成的出色光吸收，使得电池能够产生高光电流。通过细致平衡计算，在电流匹配的几何结构下可获得超过32%的效率。耦合光电模拟表明，即使在相对较高的复合率下，也能轻易实现电流匹配。对于所提出的具有适当纳米线表面钝化的电池，可获得27.1%的有前景的效率。（C）2013美国物理学会。[http://dx.doi.org/10.1063/1.4788750]