Fluoranthene-based triarylamines as hole-transporting and emitting materials for efficient electroluminescent devices

A structure–property study of fluoranthene-cored hole-transporting materials enables 19.3% efficiency in dopant-free perovskite solar cells

“…The uoranthene unit is selected as the main structural framework due to its several promising advantages including low price, highly planar structure, easy functionality, and good thermal/electrochemical stability. [42][43][44] Moreover, the unique central cyclopenta-fused ring endows the uoranthene with an electron-decient character, 45 which thereby can be used as an electron-withdrawing core to construct various D-A type HTMs. 46,47 Herein, we functionalize the uoranthene moiety with methoxy-substituted triphenylamine (TPA) units on the 3-, 8-positions or 3-, 8-, 9-positions to form a linear and star-shaped structure, respectively.…”

Synthesis, Characterization, and Physical Properties of Pyrene‐Naphthalimide Derivatives as Emissive Materials for Electroluminescent Devices

“…The large solvatochromic shifts in different solvents (between toluene and DMF) of 105 nm for N2Py, 101 nm for N4Py and 118 nm for BNPy indicate that their excited states are more stable in a polar solvent, possibly due to the separation of charges in the higher energy state. [27] To understand the structural reorganization occurring during electronic excitation, Stokes shift values in different solvents for N2Py, N4Py, and BNPy were calculated as shown in Figure 2c. Larger Stokes shifts observed in all molecules suggest substantial structural reorganization due to photo-excitation from the ground state to the excited state.…”

“…It is confirmed that these PL emissions feature ICT emissions. The large solvatochromic shifts in different solvents (between toluene and DMF) of 105 nm for N2Py , 101 nm for N4Py and 118 nm for BNPy indicate that their excited states are more stable in a polar solvent, possibly due to the separation of charges in the higher energy state [27] . To understand the structural reorganization occurring during electronic excitation, Stokes shift values in different solvents for N2Py , N4Py , and BNPy were calculated as shown in Figure 2c.…”

A silicon-cored fluoranthene derivative as a fluorescent probe for detecting nitroaromatic compounds

“…DCA was synthesized from acenaphthenequinone and 1,3-diphenylpropan-2-one according to a literature method. 42 A three-necked 250 mL round bottom ask was equipped with a reux condenser and ethanol (60 mL). Then acenaphthenequinone (5.47 g, 0.03 mol) and 1,3-diphenylpropan-2-one (6.3 g, 0.03 mol) were added, heated and stirred.…”