Carbazole‐endcapped Spiro[fluorene‐9,9′‐xanthene] with Large Steric Hindrance as Hole‐transporting Host for Heavily‐doped and High Performance OLEDs
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Yi Zhao | Linghai Xie | Hui Xu | Xiang Zhao | Yukun Wu | Mingli Sun | Dongxue Ding | Nan-nan Shi | Xiao-yu Li