Polymorph- and molecular alignment-dependent lasing behaviors of a cyano-substituted thiophene/phenylene co-oligomer† Tomomi Jinjyo,*a Hitoshi Mizuno, *a Fumio Sasakib and Hisao Yanagia Abstract Four types of crystals with different molecular orientations and crystal morphologies (green platelet, yellow platelet, yellow fiber, and orange disk) consisting of 5,5′-bis(4′-cyanobiphenyl-4-yl)-2,2′-bithiophene (BP2T-CN), a type of thiophene/phenylene co-oligomer (TPCO), were obtained by changing...