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Research Article

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

Table 1

Device performances of the vacuum-deposited blue (A and B) and solution-processed deep-blue (C and D) PhOLEDs hosted by the D-r-D molecules.

DeviceHostGuest (V)EfficiencyaEfficiency roll-off (%)bCIE (, )c
CE (cd A-1)PE (lm W-1)EQE (%)CEPEEQE

At-BuPOFIrpic4.025.2, 23.7, 19.818.6, 13.2, 8.413.9, 13.0, 10.85.9, 21.429.0, 54.86.5, 22.3(0.14, 0.31)
Bt-BuPSFIrpic3.732.4, 24.9, 22.129.5, 13.5, 9.616.2, 12.7, 11.323.1, 31.854.2, 67.521.6, 30.2(0.15, 0.34)
Ct-BuPOFIr64.722.9, 22.1, 20.211.5, 11.3, 7.712.1, 11.8, 10.73.5, 11.81.7, 33.02.5, 11.6(0.17, 0.27)
Dt-BuPSFIr64.633.7, 31.2, 15.817.6, 16.0, 5.718.3, 17.0, 8.67.4, 53.19.1, 67.67.1, 53.0(0.17, 0.26)

aIn the order of maximum, 100 and 1000 cd m-2. bRoll-offs (%) of CE, PE, and EQE in the order of 100 and 1000 cd m-2. cAt 7 V.

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