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The high molar absorption coefficient organic D-π-A dye C220 exhibits more than 6% certified electric power conversion efficiency at AM 1.5G solar irradiation (100 mW cm(-2)) in a solid-state dye-sensitized solar cell using 2,2',7,7'-tetrakis(N,N-dimethoxyphenylamine)-9,9'-spirobifluorene (spiro-MeOTAD) as the organic hole-transporting material. This contributes to a new record (6.08% by NREL) ...

We show that the observation by photoemission spectroscopy of a finite density of occupied states at the Fermi-level on a film of a conjugated organic material ~para-sexiphenyl! in which alkali metal atoms have been intercalated does not necessarily imply metallicity nor the presence of negative polarons ~radical anions!. The combination of ultraviolet photoemission spectroscopy and Kelvin prob...

This study carefully examines carrier dynamics in highly efficient dye-sensitized solar cells (DSSCs) based on a series of recently developed dicarboxyterpyridine Ru(II) dyes (PRT-11-15). Comprehensive spectral response analyses, transient photovoltage and photocurrent measurements, and transient absorption techniques are exploited to investigate the effects of various functionalized terpyridin...

We investigate midinfrared intersubband photodetectors based on short-period AlN/GaN superlattices with different quantum well thicknesses. Band structure calculations, as well as optical transmission and photovoltage measurements, underline the importance of higher order interminiband transitions. In particular, it was found that optical transitions between the second and third minibands benef...

In this paper simple quartic trigonometric polynomial blending functions, with a tensionparameter, are presented. These type of functions are useful for constructing trigonometricB´ezier curves and surfaces, they can be applied to construct continuous shape preservinginterpolation spline curves with shape parameters. To better visualize objects and graphics atension parameter is included. In th...

Self-Powered Excitonic Photovoltage Operations The transparent heterojunction array shows an ultrafast photovoltaic response of 80 ns through the excitonic operation with outstanding ultraviolet photodetection. findings this study provide a simple method for achieving photoelectric system matrix ZnO/NiO devices. More details can be found in article number 2301702 by Joondong Kim and co-workers.