Synthesis of π-A-porphyrins and their photoelectric performance for dye-sensitized solar cells

Abstract

a b s t r a c tThree p-A-porphyrins containing long alkoxyl chains attached to the ortho position of phenyl ring and a phenyl carboxylate acid or acrylic acid at the meso position of porphyrin were synthesized. All compounds were characterized by 1 H NMR and mass spectrometry. Optical and electrochemical properties were also obtained. The photovoltaic properties of these p-A-porphyrins were examined for the first time and sensitizers N-1 and N-3 achieved comparable light to electricity conversion efficiencies: 3.94% for N-1 and 4.14% for N-3. However, preparation of N-1 required simple and cost-effective synthesis which made it a promising candidate for the future practical DSSC applications. The low efficiency conversion of N-2 was well explained by the amount of dye loading, IPCE and EIS.

Stepwise co-sensitization of two metal-based sensitizers: probing their competitive adsorption for improving the photovoltaic performance of dye-sensitized solar cells

“…As the third generation of photovoltaic devices utilizing sunlight, dye-sensitized solar cells (DSSCs) have attracted considerable attention in recent years due to their relatively low cost, easyfabrication process and high photo-to-electron conversion efficiency (PCE). [1][2][3] In order to improve light-harvesting efficiencies of DSSCs, various types of sensitizers have been developed including ruthenium complexes, [4][5][6] zinc porphyrins [7][8][9][10] and metalfree organic dyes. [11][12][13][14][15][16] To date, DSSCs based on zinc porphyrin (SM315) have attained the highest PCE of 13%.…”

Synthesis and conformation of a novel fluorescein–Zn-porphyrin dyad and intramolecular energy transfer

“…First, the synthesis of dyads in which porphyrins play the role of electron donors (often coupled to molecules like fullerenes) in order to promote electron transfer for the development of new organic photovoltaic devices. 7,[20][21][22][23][24][25] Second, multichromophoric systems based on porphyrins are designed as artificial photosynthetic systems. [26][27][28][29][30][31] Although porphyrins are very often studied as dyads, there are only a handful of publications on labeling with a fluorescent molecule, without the intention to establish interactions between the two patterns, for environmental and/or health applications.…”

Synthesis of ferrocene-based polythiophenes and their applications

“…58 There are many reported methods to increase the signal strength, for example by increasing the surface area of an electrode using a modified gold nanoparticle-electrode instead of a planar gold electrode, resulted in 103-fold amplification of the electrical signals. 59 Other reports of electrical signal amplification involved the hybridization of probes with silver enhancement, 60 biometallization, 61 gold nanoparticles, [62][63][64] enzymatic amplification assisted by redox polymers, 65 ferrocene caped gold nanoparticles, 66 biobarcode, [67][68][69][70] and quantum dots. 70,71 However, electrochemical amplification strategy of the ferrocene functionalized cationic polymer proved to be the most sensitive i.e., 4 × 10 −16 M (approximately 4 zeptomoles or 2500 copies of oligonucleotides).…”