A solid-state dye-sensitized photovoltaic cell with a poly(N-vinyl-carbazole) hole transporter mediated by an alkali iodide

Abstract

A polymer-based dye-sensitized solar cell in dry solid state was constructed using poly(N-vinyl-carbazole)(PVK) as a hole-transporting layer; the cell attained the highest power efficiencies of 2.4% and 2.0% at 1/4 sun and 1 sun (AM1.5), respectively, by incorporation of a solid intermediate layer (LiI, KI) at the dye-PVK interface.

Preparation of TiNxO2–x Photoelectrodes with NH3 Under Controllable Middle Pressures for Dye‐Sensitized Solar Cells

“…For example, since O'Regan and Grätzel developed solar cells based on the nanocrystalline TiO 2 electrode, [1] dye-sensitized solar cells (DSCs) have attracted much attention for their relatively low cost and high photoelectrical properties. [2][3][4][5] A variety of methods have been devised to fabricate nanoscale TiO 2 film electrodes to obtain high energy conversion efficiency for solar cells, such as replacing with liquid electrolytes, [6] doping atoms in TiO 2 , [7] improving the performance of the dye, [8] etc. Considerable efforts have been directed to the synthesis of doped TiO 2 with the optical absorption edge red-shifted towards the visible-light region.…”

Emission Colour Tuning in Semiconducting Polymer Nanotubes by Energy Transfer to Organo‐ Lanthanide Dopants

“…Poly(N-vinylcarbazole) (PVK), a blue emissive, hole conducting polymer was selected as the host matrix. This versatile polymeric semiconductor has been previously employed in applications ranging from organic light emitting diodes (OLEDs), [9,15,16] optical waveguide lasers, [17] photovoltaic [18] and photoconductive [19] devices and carbon nanotube functionalization, [20] to luminescence chemo-sensing [21] and holographic storage.[22] The red emissive organo-lanthanide chelate Eu(dbm) 3 (Phen) (dbm: dibenzoylmethane; Phen: phenanthroline) was selected as the luminescent dopant. This complex exhibits spectrally sharp emission at 612 nm, high PL quantum efficiency, long emission lifetime, good solubility in polymer materials and has been successfully used as an emissive dopant in OLEDs [16] and polymer optical amplification devices.…”

Light Energy Conversion and Storage with Soft Carbonaceous Materials that Solidify Mesoscopic Electrochemical Interfaces

“…With this heterojunction cell, we could obtain relatively high performance, yielding a power efficiency of 2.4% in irradiance of 23 mW/cm 2 (1/4 sun) (AM 1.5). 34 Carbonaceous materials not only give an ease in creating good physical contact with soft organic materials but also function as efficient carrier collectors at the porous interface. Difficulty in applying a polymer hole conductor for solidification is that hole diffusion length in most polymer materials is limited to less than 100 nm.…”

“…Experimental approach to the carbon-based solidification of a dye-sensitized photocell. The hole-conductive polymer as n-type semiconductor that rectifies carrier transport at the dyed TiO 2 -carbon junction is incorporated in a multilayered structure (left) 34 and is hybridized with carbon particles to minimize the separation between dyed TiO 2 and the carbon counterelectrode (right). Figure 3.…”

“…34 On a conductive FTO (F-doped SnO 2 ) glass electrode (sheet resistance, 10 per square), we coated a 7 mm-thick mesoporous TiO 2 layer by sintering a nanocrystalline TiO 2 paste (Solaronix, SA) at 550 C for 30 min. After sensitization by monolayer adsorption of a ruthenium complex dye (N719), cis-bis(thiocyanato-N)bis (4,4 0 -tetrabutylammonium hydrogen dicarboxylato-2,2 0 -bipyridine-K 2 N)ruthenium(II) the dyed mesoporous layer was subjected to pore filling.…”