Lowering the driving voltage and improving the luminance of blue fluorescent organic light-emitting devices by thermal annealing a hole injection layer of pentacene
Gao Jian1, 2, 3, Yu Qian-Qian1, 2, 3, Zhang Juan1, 2, 3, Liu Yang1, 2, 3, Jia Ruo-Fei1, 2, 3, Han Jun1, 2, 3, Wu Xiao-Ming1, 2, 3, †, Hua Yu-Lin1, 2, 3, ‡, Yin Shou-Gen1, 2, 3, §
       

(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.