Absorption Enhancement of Ultrathin Crystalline Silicon Solar Cells with Dielectric Si3N4 Nanostructures *

Xin-Yu Tan,Lei Sun,Guo-Rong Zhang,Can Deng,Yi-Teng Tu,Li Guan

Fig. 5 (Color online) Two-dimensional light absorption density distribution profiles of the silicon part in our solar cell at a wavelength of 600 nm of $x$-$z$ cross-section. (a) The structure of control group corresponds to Fig. 1(a). (b) The structure with Si$_{3}$N$_{4}$ CTCs arrays corresponds to Fig. 1(b). (c) The structure with Si$_{3}$N$_{4}$ CTCs arrays and back silver reflector corresponds to Fig. 1(c). (d) Comparison of the short-circuit currents generated by the three structures (red bars) corresponding to Figs. 1(a)--1(c), the bare silicon (black dashed line).