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  1. Hexacoordinate silicon pincer complexes using 2,6-bis(benzimidazol-2-yl)pyridine (bzimpy) ligands have been developed as a multifunctional, molecular electronic materials platform. We report the synthesis, characterization, and device application of a variety of Si(pincer) 2 complexes that exhibit tunable optoelectronic properties and excellent thermal stabilities. Promising, ambipolar charge carrier properties and excimeric electroluminescence were obtained from thermally deposited films using several device architectures. Incorporation of the complexes as a thin, interfacial contact and electron transport layer improved organic solar cell efficiencies by as much as 50%. The versatility and tailorability of this class of silicon complexes provides promising evidence for their future applicationmore »in molecular electronic devices.« less
    Free, publicly-accessible full text available March 8, 2023
  2. Free, publicly-accessible full text available March 1, 2023
  3. A neutral hexacoordinate silicon complex containing two 2,6-bis(benzimidazol-2′-yl)pyridine (bzimpy) ligands has been synthesized and explored as a potential electron transport layer and electroluminescent layer in organic electronic devices. The air and water stable complex is fluorescent in solution with a λ max = 510 nm and a QY = 57%. Thin films grown via thermal evaporation also fluoresce and possess an average electron mobility of 6.3 × 10 −5 cm 2 V −1 s −1 . An ITO/Si(bzimpy) 2 /Al device exhibits electroluminescence with λ max = 560 nm.