Effect of oligothiophene π-bridge length in D-π-A star-shaped small molecules on properties and photovoltaic performance in single-component and bulk heterojunction organic solar cells and photodetectors

Investigating the dielectric properties and exciton diffusion in C70 derivatives

“…TPTPA was purchased from LumTec Corp. and used as received. 0T 42 and BDT-PhTEG 44 were synthesised following the procedure from the literature.…”

“…S17, ESI †). Furthermore, to test if a mismatch in the polarities of TPTPA and the fullerenes was an influencing factor, two new quencher molecules, BDT-PhTEG and 0T 42 were tested with BTEG-2 and BC10-2. BDT-PhTEG contains polar EG chains like BTEG-2 whereas 0T contains alkyl solubising chains like BC10-2.…”

Structure–properties of small donor–acceptor molecules for homojunction single-material organic solar cells

“…27 Although the low efficiency of primitive HOSCs 4 has severely hampered research in this direction, some recent reports suggest of renewal of interest in this of topic. [28][29][30][31][32][33][34][35][36][37] Research on HOSCs is a high-risk challenge but the knowledge accumulated during a half-century of OSC research represents a valuable intellectual capital which makes it possible to consider the problem on new bases. Charge-generation is the key problem posed by HOSCs.…”

Highly electrochemically and thermally stable donor–π–acceptor triphenylamine-based hole-transporting homopolymersviaoxidative polymerization

“…Introducing a conjugated p-spacer between the donor and acceptor fragments of the molecule leads to an increase in the energy of the HOMO level, shifts the absorption spectrum to a longer wavelength spectral region and improves the output parameters of organic photovoltaic devices. [56][57][58] The appropriate choice of electron-withdrawing groups for molecular design of D-A compounds should consider many aspects, such as electrochemical and thermal stability as well as the ability to control the intermolecular interactions and solubility of target compounds. Among various electronwithdrawing groups the dicyanovinyl fragment is one of the most promising due to its low cost and strong acceptor character.…”