Synthesis and luminescence in sol–gel auto-combustion-synthesized $$\hbox {CaSnO}_{3}{:}\hbox {Eu}^{3+}$$ CaSnO 3 : Eu 3 + phosphor

Abstract

Undoped and Eu-doped CaSnO 3 nanopowders were prepared by a facile sol-gel auto-combustion method calcined at 800 • C for 1 h. The samples are found to be well-crystallized pure orthorhombic CaSnO 3 structure. Photoluminescence (PL) measurements indicated that the undoped sample exhibits a broad blue emission at about 420-440 nm, which can be recognized from an intrinsic centre or centres in CaSnO 3. Eu-doped CaSnO 3 showed broad blue emission centred about 434 nm, a weak peak at 465 nm and a sharp intense yellow emission line at 592 nm. The emission situated at 592 nm was assigned to the f-f transition of 5 D 0 → 7 F 1 in Eu 3+ ions. The afterglow emission and PL decay results in Eu-doped CaSnO 3 phosphor, which revealed that there are at least two different traps in this phosphor. From the obtained results, Eu 3+-doped CaSnO 3 phosphor could be proposed as a potential white luminescent optical material.

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO3 Perovskite through Efficient Photon Utilization and Local Site Engineering

“…Sumithra and group have reported a weak blue band centered around 430 nm and a strong near-band-edge emission centered on 320 nm . Tsega et al have reported the emission spectrum which is quite similar in pattern to the one reported here but the intensity of blue band was overwhelmingly large when compared to other bands in their samples . The emission spectrum reported here is quite similar to the one reported for SrSnO 3 .…”

“…17 Tsega et al have reported the emission spectrum which is quite similar in pattern to the one reported here but the intensity of blue band was overwhelmingly large when compared to other bands in their samples. 59 The emission spectrum reported here is quite similar to the one reported for SrSnO 3 . 60 The blue band is of the same intensity as the other bands, in our case.…”

Recyclable Target Metal-Enhanced Fluorometric Naked Eye Aptasensor for the Detection of Pb2+ and Ag+ Ions Based on the Structural Change of CaSnO3@PDANS-Constrained GC-Rich ssDNA

“…The obtained diffraction patterns of CaSnO 3 reveal the presence of several peaks at 2θ = 18.8, 21.8, 30.9, 33.3, 37.0, 38.3, 47.8, 50.6, 57.4, 62.4, 69.8, 73.8, and 77.9, which can be attributed to the (101), (110), (020), (112), (021), (121), (022), (221), (213), (312), (133), (233), and (234) planes, respectively. They clearly indicate the formation of a standard single perovskite phase with an orthorhombic crystal structure (JCPDS 01-077-1797) . The spectral patterns show sharp peaks, indicating the crystalline nature of CaSnO 3 .…”

“…They clearly indicate the formation of a standard single perovskite phase with an orthorhombic crystal structure (JCPDS 01-077-1797). 35 The spectral patterns show sharp peaks, indicating the crystalline nature of CaSnO 3 . Moreover, the XRD pattern of CaSnO 3 @PDANS reveals the absence of noticeable peaks.…”

Structural, Optical and Electrical Properties of CaSnO3 and Ca0.98Nd0.02Sn0.98Ti0.02O3 Synthesized using Sol-Gel Method

“…There are now numerous efforts made to prepare pure and doped CaSnO3 via various synthesis routes adopted by scientist and his co-workers. M. Tsega and his team successfully synthesized Eu doped CaSnO3 using sol-gel method and studied their optical band gap and luminescence properties at room temperature and found it as a wide band gap semiconductor that possess intense emission in orange region [30]. Synthesis of CaSnO3 using hydrothermal process at 500℃ reported by H. Cheng and Z. Lu and reported its gas sensing behaviour in terms of its sensitivity [16].…”