Organic Dyes with Hydrazone Moieties: A Study of Correlation between Structure and Performance in the Solid-State Dye-Sensitized Solar Cells

Abstract

New metal-free organic dyes for solid-state dye-sensitized solar cells, employing a hydrazone fragment, have been synthesized and investigated. These sensitizers are obtained from relatively cheap starting materials, without the use of expensive catalysts, rigorously anhydrous or oxygen-free conditions. Correlation between the structure of hydrazone-containing dyes and the performance of the solid-state DSSC is investigated. The highest obtained solid-state device conversion efficiency, under standard AM 1.5G illumination (100 mW cm–2), was 4.5% (J SC = 8.03 mA cm–2, V OC = 880 mV, FF = 0.64).

Multi‐Branched Multi‐Anchoring Metal‐Free Dyes for Dye‐Sensitized Solar Cells

“…In this case a triazole ring is obtained as a π‐spacer 15a. A single example of a hydrazone spacer has also been reported 22…”

“…The cyanoacrylic acid group is typically used as an anchoring unit, with the exception of a few reports in which the nonconjugated rhodanine‐3‐acetic acid14,18,19b,22 was tested, to investigate the effect of different anchoring groups to the TiO 2 surface better. Indeed, it has been shown that this group is able to enhance the absorption performances in terms of molar extinction coefficient ( ϵ ) and absorption peak ( λ max ).…”

Relationship between measurement conditions and energy levels in the organic dyes used in dye-sensitized solar cells

“…The APCE was calculated using the IPCE (incident photon conversion-to-current efficiency) data determined earlier. [17][18][19] The quantity of light absorbed in the photoactive layers of the cell L abs is needed to calculate the APCE. The incident light is partly reected from the cell, partly absorbed in the FTO and TiO 2 layers.…”

Hydrazone-based hole transporting material prepared via condensation chemistry as alternative for cross-coupling chemistry for perovskite solar cells

“…17 Hydrazone-based (-CH=N-NRR') HTMs can also be synthesized in a simple and clean condensation reaction, and have shown good performance as electron donor in organic photovoltaics and have potential as hole transporting materials in dye sensitized solar cells with high charge carrier mobilities and tunable thermal properties. [18][19][20][21][22] However, to the best of our knowledge, these materials have not been examined in perovskite solar cells.…”