Simulation of Light-Trapping Characteristics of Self-Assembled Nano-Ridges in Ternary Organic Film

The presence of self-assembled nano-ridged (SANR) structures in PTB7-Th:PC70BM:PC60BM ternary organic blend film with the specific component ratio was experimentally clarified, and light-trapping effect SANR demonstrated. On this basis, characteristics were investigated by using finite-difference time-domain (FDTD) algorithm. results showed that have a effect, which can effectively reduce transmittance reflectance incident photons at wavelengths thus exhibit stronger photon absorption, especially for wavelength range 550–650 nm. does not depend on direction incidence, active layer traps from both its top bottom. dimensional variation has significant layer, caused height is overwhelmingly superior compared width variation. In addition, higher density SANR, more layer. This work provides theoretical basis further experimental enhancement absorption capacity structures.