材料科学
钙钛矿(结构)
铁电性
能量转换效率
铁电聚合物
光电子学
太阳能电池
微晶
兴奋剂
聚合物
电介质
钙钛矿太阳能电池
化学工程
复合材料
工程类
冶金
作者
Congcong Zhang,Zhao-Kui Wang,Shuai Yuan,Rui Wang,Meng Li,Musibau Francis Jimoh,Liang‐Sheng Liao,Yang Yang
标识
DOI:10.1002/adma.201902222
摘要
Abstract In hybrid organic–inorganic lead halide perovskite solar cells, the energy loss is strongly associated with nonradiative recombination in the perovskite layer and at the cell interfaces. Here, a simple but effective strategy is developed to improve the cell performance of perovskite solar cells via the combination of internal doping by a ferroelectric polymer and external control by an electric field. A group of polarized ferroelectric (PFE) polymers are doped into the methylammonium lead iodide (MAPbI 3 ) layer and/or inserted between the perovskite and the hole‐transporting layers to enhance the build‐in field (BIF), improve the crystallization of MAPbI 3 , and regulate the nonradiative recombination in perovskite solar cells. The PFE polymer‐doped MAPbI 3 shows an orderly arrangement of MA + cations, resulting in a preferred growth orientation of polycrystalline perovskite films with reduced trap states. In addition, the BIF is enhanced by the widened depletion region in the device. As an interfacial dipole layer, the PFE polymer plays a critical role in increasing the BIF. This combined effect leads to a substantial reduction in voltage loss of 0.14 V due to the efficient suppression of nonradiative recombination. Consequently, the resulting perovskite solar cells present a power conversion efficiency of 21.38% with a high open‐circuit voltage of 1.14 V.
科研通智能强力驱动
Strongly Powered by AbleSci AI