UV-harvesting dyes featuring a fluorene donor for visibly transparent and colorless dye-sensitized solar cells

Hydroxycinnamic acid derivatives for UV-selective and visibly transparent dye-sensitized solar cells

“…Characterization. Photophysical and electrochemical properties of the UV absorbing compounds were determined according to our previous protocols 6 . UV-visible absorbance and transmittance spectra were recorded using a UV-2600 240 V EN spectrophotometer (Shimazu, Japan).…”

“…Unfortunately, the current challenge associated with PV glazing is an inherent trade-off between transmittance and power conversion efficiency (PCE) because conventional solar cells absorb visible light to produce electricity. Recently, wavelength-selective technologies have emerged; these technologies use excitonic materials that selectively absorb ultraviolet (UV) [3][4][5][6] or near-infrared (NIR) light [7][8][9][10][11] and such wavelength-selective PVs are anticipated to overcome the limitations of semi-transparent and colored PVs for BIPV applications.…”

“…Five DSSCs of each dye were fabricated for photovoltaic measurements and stability tests. The photovoltaic performance of the DSSCs were assessed according to our previous protocols 6 . The photovoltaic parameters were evaluated using a solar cell I-V measurement system (K3000 LAB, McScience, Korea) under standard illumination condition (AM 1.5G, 100 mW/cm 2 ), and 365 nm UV LEDs (MK3005P, TNE Tech Co., Ltd, Korea).…”

5-(9-(p-Tolyl)-2,3,4,4a,9,9a-hexahydro-1H-1,4-methanocarbazol-6-yl)thiophene-2-carbaldehyde

“…In this case, the donor (D) and acceptor (A) parts are connected to each other through a π bridge, designed to expand the conjugation chain and increase the distance traveled by the electron during excitation [11]. Typically, in the synthesis of D-π-A dyes, the last step is the well-known Knoevenagel reaction of D-π-aldehyde with cyanoacrylic acid [12,13], and Suzuki cross-couplings are most often employed for the preparation of a D-π-aldehydetype molecule [14,15]. Therefore, aldehyde synthesis is a key step in the preparation of the sensitizer.…”