Singh Ranbir, Sandhu Sanjay, Yadav Hemraj, Lee Jae-Joon
Department of Energy Materials and Engineering, Research Center for Photoenergy Harvesting & Conversion Technology (phct) , Dongguk University , Seoul 04620 , Korea.
ACS Appl Mater Interfaces. 2019 Aug 21;11(33):29941-29949. doi: 10.1021/acsami.9b09121. Epub 2019 Aug 9.
Organometallic halide perovskite materials have promising photovoltaic properties and emerged as a cost-effective solar cell technology. However, a synthesis protocol to fabricate high-quality perovskite thin films under ambient conditions remains a critical issue and hinders commercialization of the technology. Therefore, this paper proposes efficient and stable fabrication of triple-cation perovskite photoactive solid-state thin film for solar cells using preformed perovskite powder under ambient conditions. Highly crystalline triple-cation perovskite powder was synthesized by a solution-processed antisolvent recrystallization technique, and films were prepared following a previously reported recipe for an efficient triple-cation perovskite. The synthesized perovskite powder was characterized using UV-visible absorption spectroscopy, X-ray diffraction, time-resolved photoluminescence, and field emission scanning electron microscopy. Fabricated solar cells were investigated for photovoltaic characteristics, including current density-voltage hysteresis, recombination losses, and thermal stability. The improved photovoltaic characteristics and thermal stability were attributed to the superior perovskite film quality and crystalline properties.
有机金属卤化物钙钛矿材料具有良好的光伏性能，已成为一种具有成本效益的太阳能电池技术。然而，在环境条件下制备高质量钙钛矿薄膜的合成方案仍然是一个关键问题，阻碍了该技术的商业化。因此，本文提出在环境条件下使用预制钙钛矿粉末高效稳定地制备用于太阳能电池的三阳离子钙钛矿光活性固态薄膜。通过溶液处理的反溶剂重结晶技术合成了高度结晶的三阳离子钙钛矿粉末，并按照先前报道的高效三阳离子钙钛矿配方制备了薄膜。使用紫外可见吸收光谱、X射线衍射、时间分辨光致发光和场发射扫描电子显微镜对合成的钙钛矿粉末进行了表征。对制备的太阳能电池进行了光伏特性研究，包括电流密度-电压滞后、复合损耗和热稳定性。光伏特性和热稳定性的改善归因于优异的钙钛矿薄膜质量和晶体性能。
