  We present the development of multifunctional blue-emission organic
light-emitting diodes (OLEDs) using TADF-exciplex materials. These OLEDs
exhibit sensitivity to external stimuli and achieve a maximum external quantum
efficiency (EQE) of 11.6 % through partly liquid processing. This technique
allows for large-scale production on arbitrary geometries.
  The potential multifunctionality of the devices arises from their response to
low external magnetic fields (up to 100 mT) with an efficiency up to 2.5 % for
magnetoconductance, while maximum magneto-electroluminescence effects of 4.1 %
were detected. We investigated novel aspects, including the utilization of two
organic materials without further doping and the investigation of the impact of
2,2',2''-(1,3,5-Benzinetriyl)-tris(1phenyl-1-H-benzimidazole) (TPBi) processing
in liquid and vapor form. The insights gained provide a fundamental
understanding regarding the applicability of exciplex (EX) materials for fully
solution-processed OLEDs through a deliberate omission of doping. Our work
represents a significant advancement on the path towards multifunctional OLED
technology, with potential applications in cost-efficient, scalable organic
full-color displays and advanced sensing system
