Solution processible charge-transporting materials that can efficiently extract charge carriers from the active layer to the electrodes and are compatible with multi-layer fabrication process, which is vital to realize the full promise of thin-film solar cell technology for low cost and scalable renewable energy. In this presentation, we introduce our efforts to develop the new type conductive electron transporting layers (ETLs) through the systematic integration of multi-functions into new material system. We create conductive, stable, and solvent resistant ETLs through addressing the challenges of three aspects: (1) developing solution-processible n-doped organic -functional materials; (2) studying the mild n-doping mechanism; (3) introducing crosslinking chemistry to form robust charge-transporting layers for multilayer integration. The charge extraction and energy alignment of ETL are simultaneously optimized due to enhanced conductivity and stability of new ETL, which afford high efficiency devices and long lifetime. These materials can be applied to broad organic electronic applications.