Research / 2020 / Article / Fig 4

Research Article

Unveiling the Effects of Interchain Hydrogen Bonds on Solution Gelation and Mechanical Properties of Diarylfluorene-Based Semiconductor Polymers

Figure 4

Photophysical properties and PLEDs performances. (a) Normalized UV-vis and PL spectra of P1-P4 in dilute toluene solution (green line, 10-5 M) and spin-coated films (violet line). (b) The electroluminescence (EL) spectra of devices based on P1-P4 upon the applied voltage increasing. (c) Current density-luminance-voltage () characteristics of PLED devices. (d) Current efficiency and external quantum efficiencies (EQE) versus current density curves of these devices.