Lattice Coherency-Driven (111)-Oriented Wide Bandgap Perovskite Films
Advanced Energy Materials, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/aenm.202506805
- Dergi Adı: Advanced Energy Materials
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
- Anahtar Kelimeler: (111)-oriented, crystal orientation, halide perovskite, lattice coherence, perovskite solar cell, seed template
- Ankara Üniversitesi Adresli: Evet
Özet
Perovskite solar cells (PSCs) have exhibited astonishing progress in power conversion efficiency (PCE) along with a remarkable improvement in long-term stability. A precise control on crystal growth, however, still remains challenging, particularly for poly-crystalline perovskite films based on solution- and low temperature-processing. Here in, we introduce a simple but effective strategy to regulate the crystallographic orientation of wide bandgap perovskite films (FA0.79MA0.12Cs0.09Pb(I0.85Br0.15)3; FA = formamidinium, MA = methylammonium) by utilizing lattice coherency with seed template, where MAPbBrXCl3−X not only serves as a kinetic controller for retarding crystal growth but also performs as a seed template to reshape the thermodynamic energy cost for regulating crystal orientation along face-up (111) array by offering enthalpy-driven reduced Gibbs free energy change. Consequently, perovskite films grown with the aid of a seed template exhibit outstanding crystallinity with the preferential orientation, while a weak crystallinity with a relatively random orientation is observed from the control sample. Noticeably, devices employing the (111)-oriented ordered structure, in spite of its unfavorable charge extraction, eventually result in competitive PCEs and superior long-term stability at the elevated temperature to those of (001)-oriented ones, emphasizing the importance of a highly ordered lattice with facet control in governing the device performance.