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含有p-n单元的苝聚酰亚胺的三元共聚及敏化光电池性能研究
Synthesis and properties of perylene copolyimide containing p-n diblock used in photovoltaic cell
【摘要】 设计、合成并表征了含有p-n(供电子-吸电子)单元的苝聚酰亚胺,并研究了其作为敏化电极材料的光电池的性能.产物为非晶态.从电子谱中计算出其能带带宽为2.19 eV,用电化学循环伏安法中计算得到其电子亲和势(Ea,最低空轨道能级)为-3.94 eV,离子势(IP,最高占据轨道能级的绝对值)为6.13 eV,其能级与二氧化钛的能级相匹配,对二氧化钛有较好的敏化作用.光电池的光电流作用谱(IPCE)与紫外电子谱十分相似,来源于相同的分子结构吸收.光电压与光强之间有指数的关系.用苝聚酰亚胺为敏化剂的光电池的光电转换效率为0.9%.
【Abstract】 The Perylene polyimide containing donor-acceptor unit was designed,synthesized and characterized by FTIR,NMR,element analysis,Ultra-visible spectrum and GPC.The photovoltaic cell composed of polyimide used as dye sensitization TiO2 was prepared and its properties were tested.The polymer is noncrystalline determined by XRD.From electron absorption spectrum,the energy of band is 2.19eV.The Ea(ELUMO)and IP(-EHOMO)are —3.94eV,6.13eV deduced by the cyclic voltammetry(CV),respectively.The energy level matches the one of TiO2,so it has better sensitization to TiO2.The overall power conversion efficiency(η) of the photovoltaic cell is 0.9%.
【Key words】 perylene; donor-acceptor unit; sensitization solar cell; photovoltaic cell;
- 【文献出处】 材料科学与工艺 ,Materials Science and Technology , 编辑部邮箱 ,2006年01期
- 【分类号】TM914
- 【被引频次】1
- 【下载频次】297