This work details the design, synthesis, characterization, and device fabrication of semi-ladder polymer systems for light-emitting transistor applications. Donor-acceptor semi-ladder polymer systems were employed as active layers in multi-layered organic light-emitting transistor devices via solution processing and structure-property interrelationship was studied in detail. Folded furan-based FFPQ polymer systems were found to be extremely promising with an external quantum efficiency of 6.9% which is the highest among solution-processed multi-layered organic light-emitting transistor devices.