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Research Article

Constructing Donor-Resonance-Donor Molecules for Acceptor-Free Bipolar Organic Semiconductors

Figure 5

EL performance of the blue and deep-blue PhOLEDs hosted by the D-r-D molecules. (a, c) Current density-voltage (open symbols) and luminance-voltage (solid symbols) curves and (b, d) efficiency-current density curves of the vacuum-deposited FIrpic-based blue (a, b) and solution-processed FIr6-based deep-blue (c, d) PhOLEDs hosted by t-BuPO and t-BuPS. Insets: device configuration (upper) and EL spectra at 7.0 V (lower).

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