Corrigendum: Effect of hexyl substituent groups on photophysical and electrochemical properties of the poly[(9, 9‐dioctyfluorene)‐2, 7‐Diyl‐alt‐(4, 7‐bis (3‐hexylthien‐5‐Yl)‐2, 1, 3‐benzothiadiazole)‐2′, 2″‐diyl]. Issue 12 (15th June 2017)