ArticleFrontiers of optoelectronics2023
Role of chloride on the instability of blue emitting mixed-halide perovskites.
Article in Frontiers of optoelectronics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- The Fundamentals of Halide Perovskite Instability: CsPbBrNanomaterials (Basel, Switzerland) · 2026Review
- Article
- Interfacial Chemistry Limits the Stability of Deep Blue Perovskite LEDs Revealed by Operando Characterization.ACS energy letters · 2025Article
- Lattice Stabilized and Emission Tunable Pure-Bromide Quasi-2D Perovskite for Air-Processed Blue Light-Emitting Diodes.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- Highly efficient blue light-emitting diodes based on mixed-halide perovskites with reduced chlorine defects.Science advances · 2024Article
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Authors and funding
9 authors.
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Abstract
Although perovskite light-emitting diodes (PeLEDs) have seen unprecedented development in device efficiency over the past decade, they suffer significantly from poor operational stability. This is especially true for blue PeLEDs, whose operational lifetime remains orders of magnitude behind their green and red counterparts. Here, we systematically investigate this efficiency-stability discrepancy in a series of green- to blue-emitting PeLEDs based on mixed Br/Cl-perovskites. We find that chloride incorporation, while having only a limited impact on efficiency, detrimentally affects device stability even in small amounts. Device lifetime drops exponentially with increasing Cl-content, accompanied by an increased rate of change in electrical properties during operation. We ascribe this phenomenon to an increased mobility of halogen ions in the mixed-halide lattice due to an increased chemically and structurally disordered landscape with reduced migration barriers. Our results indicate that the stability enhancement for PeLEDs might require different strategies from those used for improving efficiency.
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