Hollow hemispherical titanium dioxide (TiO2) aggregates (HHTAs) consisting of P25 TiO2 nanocrystallites were prepared by a coaxial electrospray method and applied to dyesensitized solar cells (DSCs). Although the photoelectrode film constructed with HHTAs possesses an internal surface area lower than that of one with dispersed P25 TiO2 nanocrystallites and thus achieves less dye adsorption, it ...

Lithium fluoride (LiF) is an efficient and widely used cathode buffer layer (CBL) in bulk heterojunction polymer solar cells (PSCs). The LiF thickness is normally limited to 1 nm due to its insulting property. Such small thickness is difficult to precise control during thermal deposition, and more importantly, 1-nm-thick LiF cannot provide sufficient protection for the underlying active layer. ...

All-inorganic CsPbX3 perovskite material not only has the benefits of advanced light absorption coefficient, long carrier lifetime, and simple preparation process organic–inorganic materials but it also maintains excellent stability under erosion damp heat. Stability is premise its industrialization, so all-inorganic undoubtedly a very competitive direction for development materials. However, t...

In this letter, a multioctave voltage doubler rectifier using T-type matching network is demonstrated. The topology used to flatten the load impedance, which makes it easier achieve broadband impedance matching. for input design procedure of proposed provided and discussed. For validation, prototype fabricated, performance evaluated. measured results exhibit power conversion efficiency (PCE) mo...

Conventional SC-based charge pump with fixed conversion ratio is predominantly adopted in energy harvesting (EH) systems, which becomes a bottleneck for attaining high power efficiency (PCE) wide dynamic range (WDR). This article reviews and explores the reconfigurable (RCP) as an alternative voltage-boosting element EH system. An overview of RCP structure established, followed by comprehensive...

There has been much interest in developing a thin-film solar cell because it is lightweight and flexible. The GaAs thin-film solar cell is a top contender in the thin-film solar cell market in that it has a high power conversion efficiency (PCE) compared to that of other thin-film solar cells. There are two common structures for the GaAs solar cell: n (emitter)-on-p (base) and p-on-n. The forme...

A comparative assessment of nanowire versus nanoparticle-based ZnO dye-sensitized solar cells (DSSCs) is conducted to investigate the main parameters that affect device performance. Towards this aim, the influence of film morphology, dye adsorption, electron recombination and sensitizer pH on the power conversion efficiency (PCE) of the DSSCs is examined. Nanoparticle-based DSSCs with PCEs of u...

A new mechanical supercharger-a low compression ratio scroll compressor was introduced in this paper, including the principle, scroll geometry, suction volume, inner compression ratio, etc. Then the advantages of the scroll supercharger were pointed out compared with other superchargers. After some concrete design considerations, a prototype was made and the performance tests showed the results...

Three types of GaAsP metamorphic buffer layers, including linearly graded, step and superlattices, were compared for the purposes virtual substrates red laser diode heterostructures. Laser diodes fabricated on GaAs relaxed superlattice substrates. A structure with a tensile-strained quantum well standard miscut substrate achieved TM-polarized emission at 638 nm wavelength 45% peak power convers...

TiO2 nanoparticles (NPs) with a size of 240 nm (T240), used as a light-scattering layer, were applied on 25-nm-sized TiO2 NPs (T25) that were used as a dye-absorbing layer in the photoelectrodes of dye-sensitized solar cells (DSSCs). In addition, the incident light was concentrated via a condenser lens, and the effect of light concentration on the capacity of the light-scattering layer was syst...