本文主要研究内容
作者（2019）在《Highly efficient and thermal stable guanidinium-based two-dimensional perovskite solar cells via partial substitution with hydrophobic ammonium》一文中研究指出：Layered two-dimensional（2D）perovskite solar cells（PVSCs）with a chemical formula of C（NH2）3（CH3NH3）3Pb3I10（n=3）have been fabricated through additive engineering,wherein stoichiometrically equivalent guanidinium（GA+）and methylammonium（MA+）serve as spacer cations.The crystallinity of the perovskite films is dramatically enhanced with proper amount of methylammonium thiocyanate（MASCN）added into the precursor solution.In addition,we substitute a small amount of MA+with hydrophobic phenylethylammonium（PEA+）,which can passivate trap states of the perovskite films.As a result,the open circuit voltage increases to 1.1 V and the best power conversion efficiency（PCE）of 10.12%is yielded.Furthermore,superior thermal stability and balanced moisture stability of the PEA-substituted GA-based PVSCs are demonstrated,compared to the popular 3D MAPbI3and 2D PEA-based PVSCs.They retain approximately 80%of the original PCE after 30 d at 20%relative humidity（RH）,and 50%of the original PCE after 3200 min at 85°C without any encapsulation.This work suggests a new route to achieve both heat and humidity stable PVSCs by simply mixing different spacer cations.
Abstract
Layered two-dimensional（2D）perovskite solar cells（PVSCs）with a chemical formula of C（NH2）3（CH3NH3）3Pb3I10（n=3）have been fabricated through additive engineering,wherein stoichiometrically equivalent guanidinium（GA+）and methylammonium（MA+）serve as spacer cations.The crystallinity of the perovskite films is dramatically enhanced with proper amount of methylammonium thiocyanate（MASCN）added into the precursor solution.In addition,we substitute a small amount of MA+with hydrophobic phenylethylammonium（PEA+）,which can passivate trap states of the perovskite films.As a result,the open circuit voltage increases to 1.1 V and the best power conversion efficiency（PCE）of 10.12%is yielded.Furthermore,superior thermal stability and balanced moisture stability of the PEA-substituted GA-based PVSCs are demonstrated,compared to the popular 3D MAPbI3and 2D PEA-based PVSCs.They retain approximately 80%of the original PCE after 30 d at 20%relative humidity（RH）,and 50%of the original PCE after 3200 min at 85°C without any encapsulation.This work suggests a new route to achieve both heat and humidity stable PVSCs by simply mixing different spacer cations.
论文参考文献
论文详细介绍
论文作者分别是来自Science China(Chemistry)的，发表于刊物Science China(Chemistry)2019年07期论文，是一篇关于,Science China(Chemistry)2019年07期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自Science China(Chemistry)2019年07期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。