Dissociative Electron Capture and Electron Affinity of Ir(ppy)3 and Alq3 Complexes

Key Points

• This work aims to determine the electron affinity of Ir(ppy)3 and compare it to Alq3 using dissociative electron attachment spectroscopy.
• Utilized dissociative electron attachment spectroscopy (DEAS) for Ir(ppy)3 and Alq3 measurements.
• Estimated electron affinity for Ir(ppy)3 in the range of 0.82–0.94 eV at temperatures 465–515 K.
• Compared electron affinity with theoretical predictions from density functional theory (DFT).
• Calculated electron affinity for Ir(ppy)3 ranged from 0.82–0.94 eV, which contrasts with the DFT predicted value of 0.33 eV.
• Alq3's electron affinity measured 0.9–1.02 eV, aligning well with DFT values.
• Findings suggest discrepancies between experimental results and theoretical predictions, especially for Ir(ppy)3.