Role of π-spacer in regulating the photovoltaic performance of copper electrolyte dye-sensitized solar cells using triphenylimidazole dyes

Abstract

In dye-sensitized solar cells (DSSC), π-spacers play a critical role in regulating photovoltaic accomplishment. This is more pronounced when we use alternate redox mediators like cobalt and copper which are...

Understanding High Fluorescence Quantum Yield and Simultaneous Large Stokes Shift in Phenyl Bridged Donor−π–Acceptor Dyads with Varied Bridge Lengths in Polar Solvents

“…This significantly enhanced the photocatalytic activity of the conjugated organic polymer for CO 2 reduction under visible light . These studies clearly reveal that the choice of the π-spacer plays a crucial role in tuning the dyad photophysical properties and also in enhancing the photocatalytic or photovoltaic activity. − …”

Synergistic end-capped engineering on non-fused thiophene ring-based acceptors to enhance the photovoltaic properties of organic solar cells

“…The energy gap ( E g ) shows the need for dissociation of excitons and is thus a distinguishing feature of SCs and other PV devices. 50,52 The electrical energy levels of an organic solar device are inversely related to the PCE, i.e. , a smaller band gap results in greater efficiency.…”

“…The energy gap (E g ) shows the need for dissociation of excitons and is thus a distinguishing feature of SCs and other PV devices. 50,52 The electrical energy levels of an organic solar device are inversely related to the PCE, i.e., a smaller band gap results in greater efficiency. By the modication of the parent molecule 4TR, such as replacement of the terminal acceptor groups in this case, the HOMO-LUMO gap (E g ) can be improved.…”

Synthesis of efficient bi-anchoring bifuran/biphenyl derivatives for dye-sensitized solar cell applications

“…Because of its importance to DSSCs, its molecular structure should be carefully engineered to achieve wider panchromatic absorption spectra, appropriate FMO energy levels, and outstanding stability. 7 According to this study, the donor–(π-spacer)–acceptor (D–π–A) strategy is the most widely studied molecular geometry for effective organic dyes. 8 The π-conjugation linkage between the donating portion and the acceptor unit facilitates effective photo-induced intramolecular charge transfer (ICT).…”

“…17 2.3.2 General methodology for the preparation of [1,1 ′biphenyl]-4,4 ′ -diylbis(methanylylidene))bis-(pyrimidine) derivatives HB-5-8. [1,1 ′ -Biphenyl]-4,4 ′ -dicarbaldehyde (9) was prepared via Suzuki coupling reaction of 4-bromobenzaldehyde (7) (1 g, 5.4 mmol) with (4-formylphenyl)boronic acid (8) (955 mg, 6.4 mmol), Pd(PPh 3 ) 4 as a catalyst (120 mg), and 4 g of anhydrous K 2 CO 3 as a base in 25 mL of 1,4-dioxane. The reaction mixture was reuxed overnight, then it was extracted with ethyl acetate, and the organic layer was evaporated until the formation of solid product that was puried from ethyl acetatetoluene by recrystallization process to obtain [1,1 ′ -biphenyl]-4,4 ′ -dicarbaldehyde (9) mp = 148-149 °C, lit.…”