Cathode modification in planar hetero-junction perovskite solar cells through a small-molecule zwitterionic carboxylate
Cathode modification in planar hetero-junction perovskite solar cells through a small-molecule zwitterionic carboxylate
复制标题
通过小分子两性离子羧酸盐对平面异质结钙钛矿太阳能电池进行阴极修饰
DOI：
10.1016/j.orgel.2017.06.006
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发表时间：
2017
影响因子：
3.2
通讯作者：
Fang Junfeng
中科院分区：
文献类型：
--
作者：
Zhu Liping;Li Xiaodong;Song Changjian;Liu Xiaohui;Wang Ying-Chiao;Zhang Wenjun;Fang Junfeng
提出了一种新的羧酸功能化小分子非共轭两性离子表面活性剂HDAC，其合成工艺简单，一步合成法可行。它可以作为一个有效的中间层，以改善反平面异质结钙钛矿太阳能电池的富勒烯/阴极界面。HDAC改进的器件可以将功率转换效率从15%提高到17%。性能参数的主要提高在于填充因子从72%左右提高到80%，这可以归因于在电子传输层和阴极的界面处形成界面偶极子和消除势垒。这项工作为钙钛矿太阳能电池中高效的界面材料提出了一个简单的设计原则。
A new carboxylate functionalized small molecule non-conjugated zwitterion, HDAC was proposed for its feasible one-step synthetic procedure. It can be used as an efficient interlayer to improve the fullerene/cathode interface of inverted planar heterojunction perovskite solar cells. A HDAC modified device could increase the power conversion efficiency from 15% to 17%. The main increase of the performance parameter lies on the increase of fill factor from around 72% to 80%, which could be attributed to the formation of interface dipole and elimination of potential barrier at the interface of electron transporting layer and cathode. This work brings up a simple design principle for efficient interfacial materials in perovskite solar cells.