Strain relaxation and domain enlargement<i>via</i>phase transition towards efficient CsPbI<sub>2</sub>Br solar cells
Fazheng Qiu, Minghua Li, Shuo Wang, Yan Jiang, Junjie Qi, Jin‐Song Hu
Abstract
We propose a phase transition growth strategy for the deposition of CsPbI 2 Br films that allows relaxation of the tensile strain by 62 ± 4% and reduction of defect densities at the film surface and in bulk. PSCs achieve an efficiency of 16.5%.
Topics & Concepts
Strain (injury)Tensile strainRelaxation (psychology)Materials sciencePhase transitionPhase (matter)Deposition (geology)Condensed matter physicsChemical physicsCrystallographyChemistryUltimate tensile strengthComposite materialPhysicsOrganic chemistrySedimentBiologyPsychologySocial psychologyPaleontologyMedicineInternal medicinePerovskite Materials and ApplicationsChalcogenide Semiconductor Thin FilmsQuantum Dots Synthesis And Properties