NOVELTY - The article such as solid state photovoltaic cell comprises first and second electrodes, a photovoltaically active layer (140) between the first and second electrodes, and a hole carrier layer (150) between the photovoltaically active layer and the second electrode. The photovoltaically active layer comprises titanium oxide nanoparticles having an average particle diameter of 25-60 nm, a dye, and a proton scavenger. The photovoltaically active layer has a thickness of 10 microns. The dye has a molar extinction coefficient of 8000.    USE - The article such as solid state photovoltaic cell is useful in electronic devices. Uses include but are not limited to field effect transistors, photodetectors (infrared (IR) detectors), photovoltaic detectors, imaging devices (e.g. RGB (red, blue, green) imaging devices for cameras or medical imaging systems), LEDs (e.g. organic LEDs or IR or near IRLEDs), lasing devices, conversion layers (e.g. layers that convert visible emission into IR emission), amplifiers and emitters for telecommunication (e.g. dopants for fibers), storage elements (e.g. holographic storage elements), and electrochromic devices (e.g. electrochromic displays).    ADVANTAGE - The article such as solid state photovoltaic cell reduces electron-hole recombination rates and increases the open circuit voltage thus improving its efficiency, current density and performance, and exhibits reduced charge separation as the thickness can be larger than the diffusion length of the charges generated by the photovoltaic cell during use.    DETAILED DESCRIPTION - The article such as solid state photovoltaic cell comprises first and second electrodes, a photovoltaically active layer (140) between the first and second electrodes, and a hole carrier layer (150) between the photovoltaically active layer and the second electrode. The photovoltaically active layer comprises titanium oxide nanoparticles having an average particle diameter of 25-60 nm, a dye, and a proton scavenger. The photovoltaically active layer has a thickness of 10 microns. The dye has a molar extinction coefficient of 8000. A hole blocking layer (130) is present between the photovoltaically active layer and the first electrode. The hole blocking layer comprises a non-porous metal oxide layer An INDEPENDENT CLAIM is included for a method for making an article such as solid state photovoltaic cell.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of a solid state dye sensitized photovoltaic cell.    Substrate (110)    Electrode (120)    Hole blocking layer (130)    Active layer (140)    Hole carrier layer. (150)