Enhanced stability in cesium assisted hybrid 2D/3D-perovskite thin films and solar cells prepared in ambient humidity
Enhanced stability in cesium assisted hybrid 2D/3D-perovskite thin films and solar cells prepared in ambient humidity
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提高环境湿度下制备的铯辅助杂化 2D/3D 钙钛矿薄膜和太阳能电池的稳定性
DOI：
10.1016/j.solener.2019.07.081
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发表时间：
2019-09
期刊：
影响因子：
6.7
通讯作者：
Wu Huizhen
中科院分区：
文献类型：
--
作者：
Ali Nasir;Wang Xiaoyu;Rauf Sajid;Attique Sanam;Khesro Amir;Ali Shahid;Mushtaq Naveed;Xiao Haibo;Yang Chang Ping;Wu Huizhen
2D/3D复合钙钛矿材料(HPVK)由于具有高效率和较高的环境稳定性，在有机金属卤化物钙钛矿太阳能电池(PSCs)领域受到越来越多的关注。在HPVK中，3D组件充当活性材料，而2D组件提供保护，使其免受环境因素的影响。在本文中，我们将十二烷基氯化铵(DACL)加入到3D-钙钛矿(FAMAPbI3)的前驱体溶液中，以获得HPVK。X射线衍射、光学吸收和傅里叶变换红外光谱证实了HPVK的形成。结构和光学分析证实，在HPVKs的情况下，不仅钙钛矿的结晶度显著提高，而且其结构性质和光学带隙也发生了变化。研究还发现，DACL的加入显著改善了HPVK薄膜的表面形貌。微量的CSI也被加入到HPVK的前驱体溶液中，这进一步有助于HPVK的形成，从而导致显著地延长载流子寿命。最后，由HPVK制成的太阳能电池显示出比纯3D钙钛矿更好的PCE。所有的HPVKs薄膜和太阳能电池都是在环境湿度下制备的，不仅在相对湿度>；50%下，而且在85 ℃的高热应力下，都更疏水和稳定。
Owing to their high efficiency and extended environmental stability, hybrid 2D/3D-perovskites (HPVKs) are gaining an increasing interest in the field of organometal halide perovskite solar cells (PSCs). In HPVKs, the 3D component acts as an active material, where its 2D-counterpart provides protection against environmental factors. Here in, we add dodecylammonium-chloride (DACl) into the precursor solution of 3D-perovskites (FAMAPbI3) to achieve HPVKs. The formation of HPVK is confirmed by XRD, optical absorption, and Fourier-transform infrared (FTIR) spectroscopies. The structural and optical analysis affirmed that in the case of HPVKs, not only the crystallinity of perovskites is improved significantly but also a variation in its structural properties and optical bandgap have occurred. It is also observed that the surface morphologies of HPVK films are considerably improved with the incorporation of DACl. A minute amount of CsI is also added into the precursor solution of HPVKs, which further assist the formation of HPVKs and consequently causes a significant increase in the carrier lifetime. Finally, a solar cell made of HPVKs shows an improved PCE than pure 3D-perovskites. All HPVKs films and solar-cells are prepared in the ambient humidity and found to be more hydrophobic and stable, not only under relative humidity >50% but also under high thermal stress of 85 ℃.
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影响因子：
56.9
作者：
Lee, Michael M.;Teuscher, Joel;Snaith, Henry J.
通讯作者：
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影响因子：
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作者：
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