Co‐Adsorbents: A Key Component in Efficient and Robust Dye‐Sensitized Solar Cells

Manthou, Victoria S.; Pefkianakis, Eleftherios K.; Falaras, Polycarpos; Vougioukalakis, Georgios C.

doi:10.1002/cssc.201403211

Cited by 56 publications

(41 citation statements)

References 75 publications

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“…Dye aggregation occurs during the adsorption process in the dye solution. Chenodecoxycholic acid (CDCA), a colorless small molecule, can adsorb competitively with the dye, and prevents dye aggregation on the semiconductor surface . However, the presence of CDCA also reduces the dye loading at the same time.…”

Section: Resultsmentioning

confidence: 99%

Weakly Conjugated Hybrid Zinc Porphyrin Sensitizers for Solid‐State Dye‐Sensitized Solar Cells

Qin

Paek

Dar

et al. 2016

Adv Funct Materials

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Molecularly engineered weakly conjugated hybrid porphyrin systems are presented as efficient sensitizers for solid‐state dye‐sensitized solar cells. By incorporating the quinolizino acridine and triazatruxene based unit as the secondary light‐harvester as well as electron‐donating group at the meso‐position of the porphyrin core, the power conversion efficiencies of 4.5% and 5.1% are demonstrated in the solid‐state devices containing 2,2′,7,7′‐tetrakis (N,N‐di‐p‐methoxyphenylamine)‐9,9′‐spiro bifluorene as hole transporting material. The photovoltaic performance of the triazatruxene donor based porphyrin sensitizer is better than that of the previously published porphyrin molecules exhibiting strongly conjugated push–pull structure. The effect of molecular structure on the optical and electrochemical properties, the dynamics of charge extraction, as well as the photovoltaic performance are systematically investigated, which offers a new design strategy for further refinement of porphyrin molecules.

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Section: Resultsmentioning

confidence: 99%

Weakly Conjugated Hybrid Zinc Porphyrin Sensitizers for Solid‐State Dye‐Sensitized Solar Cells

Qin

Paek

Dar

et al. 2016

Adv Funct Materials

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“…Loss of photocurrent as ar esult of significantly lower dyel oading for IDT1 and IDT2 compared with the other dyes clearly cannot compensate for the gain from anti-aggregation of the dyes. [23] In contrast, the V OC value increasesb ym ore than 60 mV owing to the alleviation of dye aggregation.T he other three dyes have significant improvements in the cell performance upon addition of CDCA: h = 4.51 %, J SC = 10.71 mA cm 2 , V OC = 608 mV,F F= 0.69 for IDT3; h = 4.73 %, J SC = 12.31 mA cm 2 , V OC = 604 mV,F F= 0.64 for IDT4; h = 5.06 %, J SC = 13.71 mA cm 2 , V OC = 604 mV,F F= 0.61 for IDT5 ( Figure 9). Apparently,t he loss in dye loading is well compensated by the alleviation of aggregation-induced quenching of the excited dye molecules.…”

Section: Photovoltaic Devicesmentioning

confidence: 96%

Metal‐Free Indeno[2,1‐b]thiophene‐Based Sensitizers for Dye‐Sensitized Solar Cells

et al. 2016

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As eries of indeno [2,1-b]thiophene-containing organic dyes (IDT1-IDT5)h ave been synthesized, and their UV/Vis spectra extend beyond7 00 nm. These dyes were employed as sensitizers for dye-sensitized solar cells (DSSCs). Among them, dyes IDT3-IDT5 with at hiophene unit conjugated with an anchorh ave better light harvesting ability and higher J SC values. Dye aggregation contributes substantially to the photocurrent in the near infrared region. The dye IDT5,w ith chenodeoxycholic acid (CDCA) as the co-adsorbent,h as the highest power conversion efficiency (5.06 %) under AM 1.5G simulated sunlight irradiation, which is 68 %o ft he standard device based on N719 dye.

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“…Dye solution co-adsorbing additives "Soft modification," simple rinse and dry to alter TiO 2 /dye/electrolyte interface favorably is to add additives along with the dye adsorption solution known as "co-adsorbents" [95][96][97][98]. These additives are also known as de-aggregating agents which aid in favorable dye orientation on TiO 2 and increased electron injection through minimization of dye-dye intermolecular charge transfer and π-π stacking [99].…”

Section: Metals and Metal Oxides For Tio 2 Modificationsmentioning

confidence: 99%

Titanium Dioxide Modifications for Energy Conversion: Learnings from Dye-Sensitized Solar Cells

Cheema¹,

Joya²

2018

Titanium Dioxide - Material for a Sustainable Environment

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During the last two and half decade modifying anatase TiO 2 has appreciably enhanced our understanding and application of this semiconducting, non-toxic material. In the domain of DSCs, the main focus has been to achieve band adjustment to facilitate electron injection from anchored dyes, and high electronic mobility for photo-generated electron collection. In retrospection, there is a dire need to assimilate and summarize the findings of these studies to further catalyze the research, better understanding and comparison of the structure-property relationships in modifying TiO 2 efficiently for crucial photocatalytic, electrochemical and nanostructured applications. This chapter aims at categorizing the typical approaches used to modify TiO 2 in the domain of DSCs such as through TiO 2 paste additives, TiO 2 doping, metal oxides inclusion, dye solution co-adsorbing additives, post staining surface treatment additives and electrolyte additives. A summary of the consequences of these modifications on electron injection, charge extraction, electronic mobility, conduction band shift and surface states has been presented. This chapter is expected to hugely benefit the researchers employing TiO 2 in energy, catalysis and battery applications.

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Co‐Adsorbents: A Key Component in Efficient and Robust Dye‐Sensitized Solar Cells

Cited by 56 publications

References 75 publications

Weakly Conjugated Hybrid Zinc Porphyrin Sensitizers for Solid‐State Dye‐Sensitized Solar Cells

Weakly Conjugated Hybrid Zinc Porphyrin Sensitizers for Solid‐State Dye‐Sensitized Solar Cells

Metal‐Free Indeno[2,1‐b]thiophene‐Based Sensitizers for Dye‐Sensitized Solar Cells

Titanium Dioxide Modifications for Energy Conversion: Learnings from Dye-Sensitized Solar Cells

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