RESUMO
ZnO nanoparticles in size of -5 nm were synthesized by wet chemical method, P-type (9,9-dihexylfluorene) (PFH) and the synthesized n-type ZnO nanoparticles were used to fabricate PFH/ZnO heterojunction structure using spin coating method. The current-voltage characteristic of the heterojunction demonstrates the typical p-n junction rectifying behavior, but such rectifying behavior disappeared in vacuum, which is considered to be related to the oxygen in ZnO. The heterojunction shown an fast and stable response to UV and blue light. The responsivity of heterostruture can be tuned by the bias. The conductivities of organic/inorganic heterojunction increase with the increase of temperature, and the derived active energy (Ea) decreased linearly with the increase of bias.
RESUMO
We report the realization of both excellent optical and electrical properties of nanostructured multicrystalline silicon solar cells by a simple and industrially compatible technique of surface morphology modification. The nanostructures are prepared by Ag-catalyzed chemical etching and subsequent NaOH treatment with controllable geometrical parameters and surface area enhancement ratio. We have examined in detail the influence of different surface area enhancement ratios on reflectance, carrier recombination characteristics and cell performance. By conducting a quantitative analysis of these factors, we have successfully demonstrated a higher-than-traditional output performance of nanostructured multicrystalline silicon solar cells with a low average reflectance of 4.93%, a low effective surface recombination velocity of 6.59 m s(-1), and a certified conversion efficiency of 17.75% on large size (156 × 156 mm(2)) silicon cells, which is â¼0.3% higher than the acid textured counterparts. The present work opens a potential prospect for the mass production of nanostructured solar cells with improved efficiencies.