Intermolecular Charge Transfer Induced Sensitization of Yb in β-Diketone Coordination Compounds with Excellent Luminescence Efficiency.

Achieving high quantum yields for Yb ion emission in complexes with organic ligands is a challenging task, as most Yb complexes with such ligands typically exhibit efficiencies below 3.5%. Our research demonstrates that the introduction of heavy atom-containing ancillary ligands, such as TPPO or TPAO, along with the careful engineering of the main β-diketone ligand, can increase the luminescence efficiency up to 20-fold by the alteration of the energy migration pathway.

Synthesis and Characterization of a New Wide Bandgap Donor Polymer through Direct Arylation Polycondensation Method for Enhanced Performance in Ternary Non-Fullerene Organic Solar Cells.

The ternary active layer approach has emerged as a promising approach to further boost the power conversion efficiency of organic solar cells. In order to absorb photons from the solar radiation below 600 nm, we have designed and synthesized a new wide bandgap polymer P(FCzNDT-DFTPhz) consisting of strong 5,6-bis(6-fluoro-9H-carbazol-3-yl)naphtho[2,1-b:3,4-b']dithiophene and di-fluoro-dithieno [3,2-a:2',3'-c]phenazine donor and acceptor units, respectively, its optical and electrochemical properties were investigated. The P(FCzNDT-DFTPhz) exhibits strong absorption spectrumbelow 650 nm along with deeper HOMO energy level (-5.

Medium Bandgap Nonfullerene Acceptor for Efficient Ternary Polymer Solar Cells with High Open-Circuit Voltage.

We have designed a new medium bandgap non-fullerene small-molecule acceptor consisting of an IDT donor core flanked with 2-(6-oxo-5,6-dihydro-4-cyclopenta[]-thiophene-4-ylidene) malononitrile (TC) acceptor terminal groups () and compared its optical and electrochemical properties with the IDT-IC acceptor. showed an absorption profile from 300 to 760 nm, and it has an optical bandgap of 1.65 eV and HOMO and LUMO energy levels of -5.