N-type organic semiconductors are the key materials that accept and transport electrons in organic electronics, such as organic phovoltaic solar cells and n-channel organic thin film transistors (OTFTs). 1,2 The development of n-type organic semiconductors has lagged behind that of p-type ones primarily due to the inherent instability of organic anions in the presence of air and water. 2a To develop high performance n-type organic semiconductors, new designs ...