2(a)Optical absorption spectra of thin films of the blockconjugated polymer 2,5-PBA;(b)Optical absorptionspectra of thin films of the block conjugated polymer PBZ.

• 标题： 图2(a)嵌段共轭聚合物2；5-PBA的吸收光谱；(b)嵌段共轭聚合物PBZ的吸收光谱(b) Fig.