 This study developed a new type of conjugated polymer with an open-shell structure and n-type semiconductor properties. The polymer was composed of two components, azequinodial bithiophene and theofene. The open-shell structure of the polymer allowed for the reduction of energy levels of its frontier orbitals, leading to improved electronic properties such as ambipolar charge transport and high spin-induced paramagnetic behavior. Furthermore, the polymer exhibited unipolar n-channel operation when treated with a PEIE process on the contact electrodes. This article was authored by Yen-Seol Kim, Dong-Sian Yang, Yen-Ju Kim, and others.