In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based “All Solid-State” Dye-Sensitized Solar Cells

Abstract

Chlorophyll a derivatives were integrated in “all solid-state” dye sensitized solar cells (DSSCs) with a mesoporous TiO2 electrode and 2′,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene as the hole-transport material. Despite modest power conversion efficiencies (PCEs) between 0.26% and 0.55% achieved for these chlorin dyes, a systematic investigation was carried out in order to elucidate their main limitations. To provide a comprehensive understanding of the parameters (structure, nature of the anchoring group, adsorption …) and their relationship with the PCEs, density functional theory (DFT) calculations, optical and photovoltaic studies and electron paramagnetic resonance analysis exploiting the 4-carboxy-TEMPO spin probe were combined. The recombination kinetics, the frontier molecular orbitals of these DSSCs and the adsorption efficiency onto the TiO2 surface were found to be the key parameters that govern their photovoltaic response.

In vitro toxicity and photodynamic properties of porphyrinoids bearing imidazolium salts and N-heterocyclic carbene gold(I) complexes

“…Monocationic chlorin 14 was prepared in a twostep procedure starting from pyropheophorbide a 12 as described in literature (Scheme 6) [63][64][65][66].…”

Cause, Regulation and Utilization of Dye Aggregation in Dye-Sensitized Solar Cells

“…And the same approach is also used in ssDSSCs [ 144 , 145 ]. Grätzel and co-workers reported a near-IR squaraine-based dye 43 for ssDSSCs.…”

“…In addition to the dye bath itself, the sensitization time and temperature also affect the formation of dye aggregation [ 145 , 155 , 156 ]. The length of time determines the amount of dye adsorption, and aggregation prevails with time at the expense of the monomer species due to the increasingly confined surface area [ 157 ].…”

Sol-Gel Chemistry: From Molecule to Functional Materials

“…The photovoltaic properties of chlorophyll-a derivatives grafted to a mesoporous TiO 2 electrode were investigated by Clément et al in "all solid-state" dye sensitized solar cells (DSSCs) using 2 ,2 ,7,7 -tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9 -spirobifluorene as the hole transport material [35]. In depth analysis of the parameters (structure, nature of the anchoring group, adsorption, etc.)…”