External quantum efficiency of exciplex-based OLEDs: Emission mechanisms revealed by magnetic field effectsRemoveXi Zhao, Maowen Xie, Dan Yuan, Li Xie, Shigang Li, Zhaofu Ren, Meng Qin, Hao Xu, Dong Zheng, QiaoMing Zhang, Jing Chen, Jingjing Wang, Xiaoqing Wu, and Zuhong XiongPhys. Rev. Applied 26, 034004 (2026)
