Two-dimensional (2D) perovskites with organic spacer ligands are promising materials with superior stability and diversity for various photovoltaic devices. While traditional perovskite precursor solutions using high boiling point solvents easily cause poor uniformity, we demonstrate a new method for rapid crystallization of 2D perovskite by adopting low boiling point solvents. Our results show that 2D perovskite films have a high quality and their processing is simplified and shortened. Photoconductors are made based on the 2D perovskite films and applied in visible light and X-ray detection effectively. These findings suggest the easily processed 2D perovskites promising for practical optoelectronic applications.
We report loading quantum dots (QDs) inside nanoporous (NP) GaN and using NP-GaN as a color converter to fabricate micro-LEDs. A strong light scattering can be induced by NP-GaN and blue pumping light can be significantly absorbed by red and green QDs. More than 90% of light conversion efficiency has been achieved for both red and green QDs inside NP-GaN. Monolithic red, green, and blue color micro-LEDs have been achieved with loading red and green QDs into NPGaN.
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