中国物理B ›› 2018, Vol. 27 ›› Issue (2): 24208-024208.doi: 10.1088/1674-1056/27/2/024208
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Yu-Long Zhao(赵宇龙), Jin-Feng Wang(王进峰), Ben-Guang Zhao(赵本广), Chen-Chen Jia(贾晨晨), Jun-Peng Mou(牟俊朋), Lei Zhu(朱磊), Jian Song(宋健), Xiu-Quan Gu(顾修全), Ying-Huai Qiang(强颖怀)
Yu-Long Zhao(赵宇龙), Jin-Feng Wang(王进峰), Ben-Guang Zhao(赵本广), Chen-Chen Jia(贾晨晨), Jun-Peng Mou(牟俊朋), Lei Zhu(朱磊), Jian Song(宋健), Xiu-Quan Gu(顾修全), Ying-Huai Qiang(强颖怀)
摘要: Here in this paper, we demonstrate a facile technique for creating the mixed formamidinium (HN=CHNH3+, FA+) and methylammonium (CH3NH3+, MA+) cations in the lead iodide perovskite. This technique entails a facile drop-casting of formamidinium iodide (FAI) solutions on as-prepared MAPbI3 perovskite thin films under the controlled conditions, which leads to controllable displacement of the MA+ cations by FA+ cations in the perovskite structure at room temperature. Uniform and controllable mixed organic cation perovskite thin films without a “bi-layered” or graded structure are achieved. By applying this approach to photovoltaic devices, we are able to improve the performances of devices through extending their optical-absorption onset further into the infrared region to enhance solar-light harvesting. Additionally, this work provides a simple and efficient technique to tune the structural, electrical, and optoelectronic properties of the light-harvesting materials for high-performance perovskite solar cells.
中图分类号: (Other integrated-optical elements and systems)