We　manufactured　polarizing　polymer　solar　cells　(PSCs)　utilizing　a　liquid　crystalline　polymer　(i.e.,　poly(2,5-bis(3-dodecylthiophen-2-yl)thieno[3,2-b]thiophene)　(PBTTT))　as　an　electron　donor　material　and　a　material　that　selectively　absorbs　polarized　light.　The　oriented　PBTTT　films　prepared　using　a　self-organization　process　exhibited　a　high　dichroic　ratio　of　ca.　6.35　at　the　absorption　peak.　The　polarizing　PSCs　based　on　oriented　PBTTT-PC71BM　photoactive　layers　exhibit　an　anisotropic　photovoltaic　effect　under　polarized　illumination　along　the　two　orthogonal　axes.　The　polarizing　PSCs　have　a　larger　power　conversion　efficiency　under　parallel-polarized　illumination　than　that　of　isotropic　PV　devices　under　unpolarized　illumination.　Based　on　picosecond　fluorescent　spectra,　the　parallel　excitation　produces　a　slower　ground　state　recovery　and　a　longer　exciton　lifetime　than　perpendicular　excitation　for　PBTTT　molecules　in　a　uniaxially　oriented　arrangement.　©　2015　Published　by　Elsevier　B.V.