| 초록 |
Ionic material-based electrical double layer (EDLs) has enhanced the performance of optoelectronic devices, because they permit facile control of charge injection/extraction barriers. Nevertheless, the correlation between mobile ion kinetics and EDLs formation in polymer solar cells (PSCs) remains unclear. Here, we present a simple and effective method for universal interfacial energy level adjustment, using iridium(III) complexes with different cations (Li+, Na+, K+). The effects of the ionic kinetics of Ir(III) complexes and EDLs formation on energy level tuning are investigated by measuring the turn-on voltage in light-emitting electrochemical cells, and the current density, conduction band shift, and electron mobility in PSCs. Furthermore, PSCs containing Ir(III) complexes exhibit great enhancement in ultraviolet (UV) light stability, owing to the strong UV light absorption capacity of the Ir(III) complexes. |
