| Title | CsI Pre-Intercalation in the Inorganic Framework for Efficient and Stable FA(1-x)Cs(x)PbI(3)(Cl) Perovskite Solar Cells |
| Authors | Zhou, Ning Shen, Yiheng Zhang, Yu Xu, Ziqi Zheng, Guanhaojie Li, Liang Chen, Qi Zhou, Huanping |
| Affiliation | Peking Univ, Coll Engn, Dept Mat Sci & Engn, 5 Yiheyuan Rd, Beijing 100871, Peoples R China. Peking Univ, Coll Engn, Dept Energy & Resources Engn, 5 Yiheyuan Rd, Beijing 100871, Peoples R China. Beijing Inst Technol, Sch Mat Sci & Engn, 5 Zhongguancun South St, Beijing 100081, Peoples R China. |
| Keywords | LEAD IODIDE PEROVSKITES CHARGE-LIMITED CURRENTS CH3NH3PBI3 PEROVSKITE FORMAMIDINIUM PERFORMANCE PHASE SPACE STABILIZATION DEGRADATION COMPLEXES |
| Issue Date | 2017 |
| Publisher | SMALL |
| Citation | SMALL.2017,13(23). |
| Abstract | Engineering the chemical composition of organic and inorganic hybrid perovskite materials is one of the most feasible methods to boost the efficiency of perovskite solar cells with improved device stability. Among the diverse hybrid perovskite family of ABX(3), formamidinium (FA)-based mixed perovskite (e.g., FA(1-x)Cs(x)PbI(3)) possesses optimum bandgaps, superior optoelectronic property, as well as thermaland photostability, which is proven to be the most promising candidate for advanced solar cell. Here, FA(0.9)Cs(0.)1PbI(3)(Cl) is implemented as the light-harvesting layer in planar devices, whereas a low temperature, two-step solution deposition method is employed for the first time in this materials system. This paper comprehensively exploits the role of Cs+ in the FA(0.9)Cs(0.1)PbI(3)(Cl) perovskite that affects the precursor chemistry, film nucleation and grain growth, and defect property via pre-intercalation of CsI in the inorganic framework. In addition, the resultant FA(0.9)Cs(0.1)PbI(3)(Cl) films are demonstrated to exhibit an improved optoelectronic property with an elevated device power conversion efficiency (PCE) of 18.6%, as well as a stable phase with substantial enhancement in humidity and thermal stability, as compared to that of FAPbI(3)(Cl). The present method is able to be further extended to a more complicated (FA, MA, Cs)PbX3 material system by delivering a PCE of 19.8%. |
| URI | http://hdl.handle.net/20.500.11897/472754 |
| ISSN | 1613-6810 |
| DOI | 10.1002/smll.201700484 |
| Indexed | SCI(E) |
| Appears in Collections: | 工学院 |
