Publication Details:
Journal or Publication Title:
Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես
Date of publication:
Volume:
Number:
ISSN:
Official URL:
Title:
Creator:
Subject:
Uncontrolled Keywords:
CsPbBr₃ ; perovskite LED ; green emission ; p-i-n structure ; electroluminescence (EL) ; bandgap tuning
Coverage:
Abstract:
This study demonstrates a significant performance enhancement in all-inorganic green perovskite light-emitting diodes (PeLEDs) by utilizing a p–i–n architecture (ITO/PEDOT:PSS/CsPbBr3/TPBi/LiF/Al). The research focuses on the synergistic effects of incorporating Strontium Chloride (SrCl2) and Lithium Bromide (LiBr) as dual-additives into the CsPbBr3 emissive layer. The introduction of these additives effectively passivates surface defects and halide vacancies, which reduces non-radiative energy losses and improves charge carrier transport within the device structure. Experimental results show that the optimized devices achieve a peak external quantum efficiency (EQE) of 2.95%, representing a nearly 50% improvement over the 1.9% efficiency of the control samples. Furthermore, the additives ensure a high-purity green emission at 512 nm with improved color saturation. These findings provide a clear and reproducible pathway toward developing high-efficiency, stable, and cost-effective all-inorganic green LEDs for next-generation optoelectronic applications.