期刊
NANO ENERGY
卷 45, 期 -, 页码 330-336出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2017.12.051
关键词
Antimony-based perovskite solar cells; Lead-free solar cells; Hydrophobic scaffold; Methyl ammonium antimony iodide; Hydrophobic interlayer
类别
资金
- Ministry of Science and Technology (MOST) of Taiwan [104-2221-E-001-014-MY3, 104-2221-E-009-096-MY3]
- Career Development Award of Academia Sinica, Taiwan [103-CDA-M01]
- Ministry of Science and Technology of Taiwan [104-2113-M-007-018, 105-2113-M-007-016]
The rapid development of perovskite solar cells (PSCs) has triggered a quest for lead (Pb)-free alternatives to improve their commercial viability. One such non-lead material, the methylammonium antimony iodide zero-dimensional dimer (CH3NH3)(3)Sb2I9, was reported recently, but with a low photo conversion efficiency (PCE) resulting from its poor surface morphology (many pinholes; amorphous nature). In this study, we employed anti-solvent treatment to improve the surface morphology of the Sb-based dimer by speeding up heterogeneous nucleation. We also incorporated an interlayer that acted as a favorable hydrophobic scaffold for the growth of large-grain (CH3NH3)(3)Sb2I9 crystals, thereby decreasing the number of the voids and increasing the film quality. We achieved a champion efficiency of 2.77%-a large improvement over the efficiencies reported previously. Using the techniques employed herein to prepare new perovskite-like materials, Sb-based photoabsorbers might become promising replacements for Pb-based perovskites.
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