Two‐Step Sol–Gel Synthetic Strategy for Highly Dispersed Eu2+ Luminescence Centers for Tuning Emission. Issue 2 (24th September 2020)

• Record Type: Journal Article
• Authors: Shang, Mengmeng; Wang, Jindi; Dang, Peipei; Lian, Hongzhou; Lin, Jun
• Is Part Of: Advanced photonics research. Volume 1:Issue 2(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-09-24
• Subjects: dispersed luminescence centers -- tunable emission colors -- two-step sol–gel methods; Photonics -- Periodicals; 621.36505
• DOI: 10.1002/adpr.202000028
• Languages: English
• ISSNs: 2699-9293

Abstract

Abstract : The improvement of photoluminescence (PL) properties for phosphors that significantly impact the performance of white light emitting diodes (WLEDs), especially color rendition and luminous efficiency, is an extremely important challenge. Herein, an effective two‐step sol–gel synthetic strategy is developed to realize the regulation of PL spectra of Eu 2+ in Ca9 MnNa(PO4 )7 (CMNP) crystal lattice to yield the white light emission in a single‐phase phosphor. The thermal stability of this CMNP‐based phosphor is improved as compared with the phosphor using a solid‐state method. The origin of the enhanced Eu 2+ emission is investigated, and a thorough evaluation of the WLED fabricated using the white emitting phosphor demonstrated the two‐step sol–gel synthetic strategy is an effective way to adjust luminescence performance and provide another strategy to regulate PL spectra of luminescence materials in addition to the crystal field strategy based on ion substitution. Abstract : Herein, a two‐step sol–gel method to regulate the spectral properties of the phosphors is first proposed. Compared with the solid‐state reaction, this method contributes to the well‐separated, highly dispersed luminescence centers, which is the key factor for full‐spectral emission. The two‐step sol–gel method can open new avenues for the regulation of luminescence color.