Lowering the driving voltage and improving the luminance of blue fluorescent organic light-emitting devices by thermal annealing a hole injection layer of pentacene |
(color online) The work function of the pentacene films with different annealing conditions measured by a Kelvin probe (film prepared on the ITO glass substrate with a thickness of 5 nm). Inset shows the carrier mobility of the OFETs based on the pentacene films annealed at different temperatures. |