Abstract
An organic light-emitting diode with multipeak emission was achieved in a single-layer device based on the blend film of poly(9,9'-dioctylfluorene-co-bis-N,N'-(4-butylphenyl)-bis-N,N'-phenyl-1,4-phenylene-diamine) (PFB) and N,N'-bis(1-ethylpropy)-3,4,9,10-perylenebis (dicarboximide) (EPPTC). A heterointerfacial transition was mediated by the electromer state in PFB to the highest occupied orbit in EPPTC, which produced green emission with a center wavelength of about 2.25 eV (550 nm). In combination with the electromer emission in PFB and the intrinsic electroluminescence (EL) in EPPTC, which are both in the red, and the intrinsic EL in PFB in the blue, the heterointerfacial emission filled the gap in the green and enabled true white-light emission from such an organic light-emitting diode.
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