We have designed the semitransparent solar cells with two fullerene materials as active layers. we have used the two-dimensional(2D) photonic crystals (PC) in the active layer and investigated the optical parameters of these structures. We have utilized the Finite-difference time-domain (FDTD) method for our simulation and have shown that the effect of 2D photonic crystals in transmission, absorption, short-circuit current density (Jsc), and generation rate. We also found that the polymer donor poly[2,60-4,8-di(5-ethylhexylthienyl)benzo[1,2-b;3,3-b [dithiophene]-alt-[3-fluoro-2[(2-ethylhexyl)carbonyl]thieno[3,4-b[thiophenediyl] (PTB7- Th) with the visible absorbing fullerene acceptor [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM), PTB7-Th:PC71BM, can be a better choice as an active layer compared with the poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methylester (PCBM), P3HT:PCBM. This study can be useful for light management in semitransparent organic solar cells.
Using a tight-binding model up to the second nearest-neighbor (2NN) interactions, an analytic expression for the selection rule and the optical dipole matrix elements have been derived as a function of optical energy of some single-walled silicon hexagonal nanotubes (Si h-NTs). For this purpose, the energy dispersion, dipole matrix elements and optical absorption obtained up to the 2NN are compared with those obtained for the first nearestneighbors (1NN) for incident light polarized parallel to the tube axis. By concerning more distant-neighbors, in general, the 1NN model can be improved. The results show that there is a shift in the dispersion energy including second neighbors in comparison with first neighbors, which it depends on the subband index. One can also see that the absorption intensity is increased for both metallic and semiconducting nanotubes. The numerical result may be useful in designing nano-optoelectronic devices.
Solar energy technologies provide solutions for the effective exploitation of internet of things (IoT)‐based applications such as smart devices. Organic photovoltaics (OPVs) fabricated from π‐conjugated carbon‐based semiconductors have shown great potential for indoor applications based on exceptional properties that include small current leakage under dim lighting, large absorption coefficient, and low‐cost solution processes. However, organic cells need additional enhancements, such as improving their dim light absorption and exploiting suitable bandgap materials, to make the best use of indoor lighting photons. This article highlights the crucial role of the theoretical basis of photovoltaics and reviews the effect of active layer thickness. Furthermore, the crucial advancements in material design for indoor OPVs are highlighted herein. Lastly, the contribution of plasmonic effect of metallic nanoparticles (MNPs) to improve the performance of OPVs is elaborated, which could contribute to raising the efficiency of energy conversion and reaching production scale criteria.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.