Synthesis and novel emission properties of Bi3+‐doped Ca2BO3Cl phosphor for plant cultivation. Issue 1 (14th December 2022)

• Record Type: Journal Article
• Authors: Khan, Muhid S.; Mehare, Manohar D.; Parauha, Yatish R.; Dhale, Shrikrishna A.; Dhoble, Sanjay J.
• Is Part Of: Luminescence. Volume 38:Issue 1(2023)
• Page Start: 4
• Page End: 11
• Publication Date: 2022-12-14
• Subjects: calcium borate chloride -- photoluminescence -- plant cultivation -- w‐LEDs -- X‐ray diffraction; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.4418
• Languages: English
• ISSNs: 1522-7235

Abstract

Abstract: In the present work, a series of Bi 3+ ‐activated Ca2 BO3 Cl phosphors was synthesized using the conventional high‐temperature solid‐state reaction method. The crystal structure of the prepared sample was determined to be monoclinic with space group P21/c. Scanning electron microscopy (SEM) analysis demonstrated the surface morphology with aggregated particles and sizes in the nano range. The presence of vibrational features and their luminescence characteristics were studied using Fourier transform infrared spectroscopy and photoluminescence (PL) techniques, respectively. At the 486 nm excitation wavelength, the PL spectrum revealed a sharp emission centred at 732 nm that was attributed to the 3 P1 → 1 S0 transition of Bi 3+ . The emission spectra exhibited the highest emission intensity at 0.5 mol% Bi 3+ ion concentration, beyond this the emission intensity decreased due to the concentration quenching phenomenon attributed to multipolar interaction. The Commission Internationale de l'éclairage coordinates located at (0.7347, 0.2653) confirmed emission in the deep‐red region with a colour purity of 99.98%. The obtained outcomes suggested that the reported material may be a promising candidate as a red‐emitting phosphor for w‐LEDs and plant growth applications. Abstract : A series of Bi 3+ ‐doped Ca2 BO3 Cl phosphors was synthesized using a conventional high‐temperature solid‐state reaction method. The structure, surface morphology, and existence of vibrational features were studied using XRD, SEM, and FTIR analyses. The optimum doping concentration of Bi 3+ ions in the Ca2 BO3 Cl host phosphor was 0.5 mol%. Photoluminescence characterization was carried out at room temperature. The intense photoluminescence emission in the deep‐red region at 732 nm and at an excitation wavelength of 486 nm demonstrated the suitability of the as‐prepared phosphor for plant cultivation applications.