Highly-efficient metal-free organic dyes for dye-sensitized solar cells

Abstract

A solar-to-electric conversion efficiency of 6.1% is achieved with this new dye, compared to 6.3% for N3 dye under the same experimental conditions. Although these indoline dyes are slightly less efficient than N3 dye, the cost of indoline dye is much less than for N3 due to ease of preparation. Furthermore, indoline dyes are shown to be highly stable to photoredox processes by cyclic voltammogram.

Charge Transport Characteristics of Dye-Sensitized TiO2Nanorods with Different Aspect Ratios

“…Most of all, the structure and shape of TiO 2 , used for the formation of the dye-absorbing electrode, will critically affect the pore size distribution, porosity, and connectivity among TiO 2 nanocrystals, all of which will be correlated to the transport of electrons and the diffusion of electrolytes in the cells. Thus far there were various reports on the improvement of TiO 2 photoelectrode system by tailoring of particle size and morphology, 3,4 modification of electrode structure and fabrication procedure, 5 suppress of charge recombination, 6,7 interfacial control, 8 and others. In general, TiO 2 electrodes have been prepared from the spherical nanoparticles by doctor-blade technique, which is a convenient method to form nanoporous electrodes with high surface areas.…”

Ultrafast dynamics of the indoline dye D149 on electrodeposited ZnO and sintered ZrO2 and TiO2 thin films

“…1), have received considerable attention, because of their high extinction coefficient and their broad absorption reaching into the red range of the spectrum. [13][14][15] The timescale of photoinduced electron injection into the mesoporous semiconductor oxide surface is a key parameter for the efficiency of a DSSC. Injection processes have been studied for a variety of sensitized systems.…”

Em busca da sustentabilidade: células solares sensibilizadas por extratos naturais

“…12 Diversos trabalhos recentes têm mostrado a viabilidade da substituição dos complexos metálicos por espécies orgânicas com alta absorção na região do visível e que são capazes de atuar como sensibilizadores eficientes. [15][16][17][18][19][20][21][22][23][24] Nesse sentido, a natureza oferece um grande número de sensibilizadores como taninos, derivados da clorofila e antocianinas, que vêm sendo utilizados em células solares. 25 [38][39][40] Para a preparação dos fotoanodos, filmes de TiO 2 , obtidos a partir da rota sol-gel, 41 foram depositados por meio da técnica painting sobre vidros recobertos com uma camada condutora de óxido de estanho dopado com fluoreto, FTO (R = 10 W/, Pilkington).…”