Abstract
New hole transport materials (HTMs) with cross‐linkable units HT‐1 and HT‐2 are designed with suitable energy levels, good solubility, and good solvent resistance after film formation. Subsequently, the cross‐linkable HTMs based OLEDs with a green TADF emitter show significantly improved current efficiency (CE) of 52 cd/A and 68 cd/A, respectively, compared to the device without HTM of less than 23 cd/A. This study demonstrates a new HTM design strategy with controllable energetics for printable optoelectronic devices, including OLEDs and quantum‐dot LEDs.
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