Pushing the conductance and transparency limit of monolayer graphene electrodes for flexible organic light-emitting diodes
Lai‐Peng Ma, Zhongbin Wu, Lichang Yin, Dingdong Zhang, Shichao Dong, Qing Zhang, Maolin Chen, Wei Ma, Zhibin Zhang, Jinhong Du, Dongming Sun, Kaihui Liu, Xiangfeng Duan, Dongge Ma, Hui–Ming Cheng, Wencai Ren
Abstract
Significance Although graphene shows great promise as a generational flexible transparent electrode (FTE), its development has been severely limited by the intrinsic trade-off between electrical conductance and transparency with the performance metrics inferior to that of the state-of-the-art ITO electrodes. We report a straightforward approach to break previous limit in graphene FTEs and yield an unprecedented performance that rivals the best commercial ITO electrode. Using the tailored monolayer graphene FTE, we further demonstrate high-performance flexible green organic light-emitting diodes (OLEDs) with the efficiencies outperforming all comparable flexible OLEDs and surpassing that with rigid ITO anode. This simple strategy will boost the development of next-generation flexible optoelectronics beyond the dominant rigid platforms.