The enhancement of photovoltaic properties of the DSSCs based on D–A–π–A organic dyes via tuning auxiliary acceptor

Novel Organic Dyes Featuring Spiro[dibenzo[3,4:6,7]cyclohepta[1,2-b]quinoxaline-10,9′-fluorene] (SDBQX) as a Rigid Moiety for Dye-Sensitized Solar Cells

“…A large R ct indicates a small dark current and a low charge recombination rate. 30 The R ct values increased in the order of FHD5 (26.1 Ω) < FHD4 (41.7 Ω) < FHD6 (53.2 Ω), which are in good agreement with the V oc values.…”

Modification of the electronic properties of the π-spacer of chromophores linked to calix[4]arene platform for DSSCs applications

“…Taking into account this broad absorption, quite high short-circuit photocurrent density (J sc ) can be expected. [35] Concerning the comparison of ICT bands shown in Fig.1, it should be noted that the lengthening of the spacer in dyes 8 and 9, incorporating heterocycles, with respect to Cx-2-TPA results in a bathochromic shift and an increased molar extinction coefficient which points to a potential higher light -harvesting efficiency. Moreover, as it was expected, dye 9 with a benzothiadiazole unit shows bathochromic shifted absorption as compared with dye 8.…”

Electronic anti‐injection effect for carbonyl in anchor group based on diphenylacetylene D 2 ‐π‐A sensitizer in dye‐sensitized solar cells

“…Meanwhile, the electron acceptors, as one of the factors, affected photovoltaic performance in charge of the intramolecular charge transfer (ICT) process and the injecting electron into TiO 2 film due to its electron withdrawing capability and bonding with the surface hydroxyl of semiconductor 28 . In the design of sensitizer, the most commonly used receptor is cyanoacetic acid, carboxylic acid or rhodanine‐3‐acetic acid derivative 29‐32 . Because carboxyl group can tightly linked to TiO 2 via formed‐ester, the dye and conduction band(CB) of TiO 2 build strong connection and good electron transmission 33 .…”

“…28 In the design of sensitizer, the most commonly used receptor is cyanoacetic acid, carboxylic acid or rhodanine-3-acetic acid derivative. [29][30][31][32] Because carboxyl group can tightly linked to TiO 2 via formed-ester, the dye and conduction band(CB) of TiO 2 build strong connection and good electron transmission. 33 For instance, triphenylamine-based dye synthesized by Kim et al obtained high value (9.67%) with cyanoacetic acid as the anchoring group.…”