Plasmon Mediated Near‐Field Energy Transfer From Solid‐State, Electrically Injected Excitons to Solution Phase Chromophores

An organic diode is demonstrated that near‐field energy transfers to molecules in solution via surface plasmon polaritons, in contrast to typical far‐field excitation via absorption of traveling photons. Electrically generated excitons couple to surface plasmon modes in the cathode; the plasmons subsequently excite chromophore molecules on top of the cathode. External quantum efficiency and time resolved photoluminescence measurements are used to characterize the diode and the near‐field energy transfer process. In addition, it is shown that excited chromophores can charge‐transfer to quencher molecules, illustrating the potential of this device to be used for photochemical applications. An organic diode is demonstrated that near‐field energy transfers to molecules in solution via surface plasmons. Electrically generated excitons couple to plasmon modes in the cathode; the plasmons subsequently excite chromophore molecules on top of the cathode. In addition, it is shown that excited chromophores can charge‐transfer to quencher molecules, illustrating the potential of this device for use in photochemical applications.