Conjugated polyelectrolytes and neutral polymers with poly(2,7‐carbazole) backbone: Synthesis, characterization, and photovoltaic application
作者:Xiaofeng Xu、Wanzhu Cai、Junwu Chen、Yong Cao
DOI:10.1002/pola.24547
日期:2011.3
Poly(2,7‐carbazole) neutral polymers (PC‐N, PC‐NOH, and PC‐P) and polyelectrolytes (PC‐NBr and PC‐SO3Na) with hydrophilic pendant groups of ammonium, phosphonate, and sulfonate were synthesized as interlayers for cathode modifications in bulk‐heterojunction photovoltaic cells (BHJ PVCs). The absorptions of the polymers were determined by the poly(2,7‐carbazole) backbone, showing absorption peaks at
合成了具有氨,膦酸酯和磺酸酯亲水侧基的聚(2,7-咔唑)中性聚合物(PC-N,PC-NOH和PC-P)和聚电解质(PC-NBr和PC-SO 3 Na)用作体异质结光伏电池(BHJ PVC)阴极修饰的中间层。聚合物的吸收由聚(2,7-咔唑)主链确定,在溶液和薄膜中显示在约390 nm处的吸收峰。由于大的分子间相互作用,在聚合物膜的光致发光光谱中发现了波长大于500nm的受激准分子发射,这削弱了聚合物的发光。PC‐N,PC‐NBr,PC‐NOH和PC‐P具有可比的-5.23 eV的HOMO水平和-2.4 eV的LUMO水平,但是PC-SO 3的HOMO和LUMO水平Na分别上升至-4.91和-2.12 eV。选择PC‐N,PC‐NBr,PC‐NOH和PC‐P在BHJ PVC中构造薄的中间层,并以PFO‐DBT35:PCBM = 1:4作为活性层。与传统的铝阴极相比,具有中间层的双层阴极显示出P