Efficient Flexible Inorganic Perovskite Light-Emitting Diodes Fabricated with CsPbBr<sub>3</sub> Emitters Prepared via Low-Temperature in Situ Dynamic Thermal Crystallization.
basic_science · Level V
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- Record sourced from PubMed, PMID 32437162.
- Also identified by DOI 10.1021/acs.nanolett.0c01550.
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Abstract
The present study systematically investigates the morphology and crystallization process of inorganic CsPbBr<sub>3</sub> perovskite layer films fabricated by thermal coevaporation in conjunction with continuous low-temperature thermal annealing to promote in situ dynamic thermal crystallization. The results confirm for the first time that both the crystal grain size and the compactness of the CsPbBr<sub>3</sub> films can be tuned during the thermal coevaporation fabrication process via in situ dynamic thermal crystallization. The performance of the PeLEDs employing the CsPbBr<sub>3</sub> films as the emitter layer is investigated in detail with respect to the substrate temperature and deposition rate employed during deposition of the CsPbBr<sub>3</sub> film. This study provides guidelines for developing suitable film production processes and highlights future challenges that must be addressed to facilitate the commercial development of large-area, uniform, and flexible perovskite-based optoelectronic devices.