Naphthalene-diimide selenophene copolymers as efficient solution-processable electron-transporting material for perovskite solar cells
Naphthalene-diimide selenophene copolymers as efficient solution-processable electron-transporting material for perovskite solar cells
复制标题
萘二酰亚胺硒吩共聚物作为钙钛矿太阳能电池的有效溶液加工电子传输材料
DOI：
10.1016/j.orgel.2019.01.040
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发表时间：
2019
影响因子：
3.2
通讯作者：
Xin Hao
中科院分区：
文献类型：
--
作者：
Yan Weibo;Wang Zilong;Gong Yuancai;Guo Shigan;Jiang Jingjing;Chen Jianhua;Tang Chengcheng;Xia Ruidong;Huang Wei;Xin Hao
通过萘二酰亚胺与含硒嵌段(含硒、双硒和三硒)的共聚反应，合成了三种萘二酰亚胺半导体聚合物(NDI-Se、NDI-BISE、NDI-TISE)。用热重分析(TGA)、紫外-可见光谱(UV-Vis)、X射线粉末衍射仪(XRD)、循环伏安法(CV)和空间电荷限制电流(SCLC)对聚合物的物理、光学、电化学性质和电学性质进行了表征。这些聚合物表现出优异的热稳定性、高结晶度和与钙钛矿相匹配的能级。利用这些聚合物作为单层和溶液处理的电子传输层(ETL)，成功地制备了ITO/NiOX/MAPbCl0.2I2.8/ETL/Ag结构的p-i-n型钙钛矿太阳电池，其效率最高(14.0%)，与热沉积C60/BCP双层ETL的标准电池(14.6%)相当。我们的结果表明，NDI-硒基共聚物是非常有前途的高效和溶液可加工的钙钛矿型太阳能电池的电子传输材料。
Three naphthalene-diimide semiconducting polymers (NDI-Se, NDI-BiSe, NDI-TriSe) were synthesized via copolymerization of naphthalene-diimide and selenophene building blocks (selenophene, biselenophene, and triselenophene). The physical, optical, electrochemical and electronic properties of these polymers are characterized by thermogravimetric analysis (TGA), UV–Vis, X-ray powder diffraction (XRD), cyclic voltammetry (CV) and space charge limited current (SCLC). These polymers show excellent thermal stability, high crystallinity, and well matched energy level to that of perovskites. Utilizing these polymers as single and solution processed electron transporting layer (ETL), p-i-n type perovskite solar cells with a configuration of ITO/NiOx/MAPbCl0.2I2.8/ETL/Ag were successfully fabricated with the highest efficiency (14.0%) achieved from NDI-TriSe solar cell, which is comparable to the standard cell (14.6%) using thermally deposited C60/BCP bilayer ETL. Our results demonstrate NDI-selenophene based copolymers are very promising electron transporting materials for highly efficient and solution processable perovskite solar cells.