Current Issue : October - December Volume : 2019 Issue Number : 4 Articles : 5 Articles
In inverted perovskite solar cells (PSCs), high-quality perovskite film grown on\nhole-transporting material (HTM) with pinhole-free coverage and a large grain size is crucial for\nhigh efficiency..............................
This work focuses on the crystal size dependence of photoactive materials and light\nabsorption enhancement of the addition of carbon dots (CDs). mac-FTO (macroporous fluorine-doped\ntin oxide) films with an inverse opal structure are exploited to supply enhanced load sites and\nto induce morphology control for the embedded photoactive materials........................
We report the simple synthesis of two organic chromophores featuring an\nethynyl-thienothiophene linker with an n-hexyl chain (CSD-03 and CSD-04), their optical and\nelectrochemical properties, and their use as photosensitizers in dye-sensitized solar cells (DSSCs).\nOur theoretical and experimental studies show that adding the second thienothiophene allows for\nnarrowing the bandgap of the molecule and thus ensuring more light harvesting in the visible region..............................
Nanocrystalline hydrogenated silicon (nc-Si:H) substrate configuration n-i-p solar cells\nhave been fabricated on soda lime glass substrates with active absorber layers prepared by plasma\nenhanced chemical vapor deposition (PECVD) and radio frequency magnetron sputtering. The cells\nwith nanocrystalline PECVD absorbers and an untextured back reflector serve as a baseline for\ncomparison and have power conversion efficiency near 6%. By comparison, cells with sputtered\nabsorbers achieved efficiencies of about 1%. Simulations of external quantum efficiency (EQE) are\ncompared to experimental EQE to determine a carrier collection probability gradient with depth\nfor the device with the sputtered i-layer absorber. This incomplete collection of carriers generated\nin the absorber is most pronounced in material near the n/i interface and is attributed to breaking\nvacuum between deposition of layers for the sputtered absorbers, possible low electronic quality of\nthe nc-Si:H sputtered absorber, and damage at the n/i interface by over-deposition of the sputtered\ni-layer during device fabrication....
In this article, an experimental study was performed to assess the potential thermal\napplication of a new nanofluid comprising carbon nanoparticles dispersed in acetone inside an\nevacuated tube solar thermal collector. The effect of various parameters including the circulating\nvolumetric flow of the collector, mass fraction of the nanoparticles, the solar irradiance, the tilt angle\nand the filling ratio values of the heat pipes on the thermal performance of the solar collector was\ninvestigated. It was found that with an increase in the flow rate of the working fluid within the system,\nthe thermal efficiency of the system was improved. Additionally, the highest thermal performance\nand the highest temperature difference between the inlet and the outlet ports of the collector were\nachieved for the nanofluid at wt. % = 0.1. The best tilt angle and the filling ratio values of the collector\nwere 30Degree and 60% and the maximum thermal efficiency of the collector was 91% for a nanofluid at\nwt. % = 0.1 and flow rate of 3 L/min....
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