Spin Centers in Vanadium-Doped Cs2NaInCl6 Halide Double Perovskites DOI Creative Commons
Kunpot Mopoung, Anna Dávid, Xianjie Liu

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(2), P. 566 - 571

Published: Jan. 9, 2024

We provide direct evidence for a spin-active V4+ defect center, likely in the form of VO2+ complex, predominantly introduced single crystals vanadium-doped Cs2NaInCl6 halide double perovskites grown by solution-processed hydrothermal method. The has C4v point group symmetry, exhibiting an electron paramagnetic resonance (EPR) spectrum arising from effective spin S = 1/2 and nuclear I 7/2 (corresponding to 51V with nearly 100% natural abundance). determined g-factor hyperfine parameter values are g⊥= 1.973, g∥ 1.945, A⊥ 180 MHz, A∥ 504 principal axis z along ⟨001⟩ crystallographic axis. controlled growth V-doped oxygen-free environment is shown suppress EPR signal. model suggested have VOCl5 octahedral coordination, where one nearest-neighbor Cl– V replaced O2–, compression V–O This VO complex formation competes isolated V3+ substitution In3+, which turn provides means charge-state tuning ions. finding calls better understanding control solution-grown perovskites, critical optimizing tailoring material design solution-processable optoelectronics spintronics.

Language: Английский

Sb3+/Sm3+ Codoped Cs2NaScCl6 All-Inorganic Double Perovskite: Blue Emission of Self-Trapped Excitons and Red-Emission via Energy Transfer DOI

Xunliang Jiang,

Haoqing Ding,

Yang Fengxi

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(23), P. 10756 - 10766

Published: May 29, 2024

The lead-free halide perovskites possess nontoxicity and excellent chemical stability, whereas relatively weak luminescence intensity limits their potential in practical applications. Therefore, strengthening the expanding application fields are urgent tasks for development of perovskites. In this paper, antimony-doped Cs2NaScCl6 crystals synthesized by a solvothermal method emit bright, deep blue photoluminescence at 447 nm. (PL), excitation (PLE), absorption spectra demonstrate that Sb3+ doping effectively activate intrinsic "dark self-trapped exciton (STE)," leading to an impressive quantum yield (PLQY) value 78.31% 1% doping. Furthermore, remains above 92% compared with fresh sample without secondary phases detected even after 90 days under environmental conditions. To expand emission spectra, rare-earth Sm3+ is further incorporated into Cs2NaScCl6:1% crystals. results show Sb ions not only enhance STE but also serve as sensitizers boost red-light Sm3+, significant 500-fold increase red intensity. Finally, PLQY reaches stunning 86.78%. These findings provide valuable insights design ion-doped double perovskites, broadening various optoelectronic devices.

Language: Английский

Citations

6
Octahedron vacancy induced luminescence improvement of double perovskite type phosphors LaMg2/3-Nb1/3O3:Mn4+ with multifunctional applications DOI
Bing Zhang, Mengjie Liu, Yi Zhu

et al.

Ceramics International, Journal Year: 2024, Volume and Issue: 50(18), P. 34153 - 34163

Published: June 17, 2024

Language: Английский

Citations

6
Tunable multimode emissions of Yb3+/Er3+-doped rare-earth-based Cs2NaYCl6 double perovskite crystals for versatile applications DOI

Hao Liang,

Gang Yang,

Jiaqi Wang

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 498, P. 155464 - 155464

Published: Sept. 3, 2024

Language: Английский

Citations

6
Tapping the Light Emitting Potential of Chalcogenide Perovskite SrHfS3 via Eu2+ Doping DOI Open Access

Yurun Liang,

Jiang Li, Zhipeng Chen

et al.

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 12(6)

Published: Oct. 6, 2023

Abstract Chalcogenide perovskites are an emerging family of perovskite materials, which possess excellent optoelectronic properties comparable with halide perovskites, avoiding the drawbacks toxicity and poor stability. Due to superiorities strong light absorption, direct bandgaps, carrier transport abilities, high defect tolerance, robust stability, non‐toxicity, chalcogenide have been extensively studied as photovoltaic materials. However, emitting potential is ignored or less explored. In this work, Eu 2+ doping strategy proposed activate abilities perovskite. The synthesized SrHfS 3 :Eu powder exhibits intense red emission through relaxation 4f 6 5d 1 7 0 . interband absorption , a distinct character perovskite, harvests optical energy funnels it luminescent center Besides, characterized by superior semiconducting properties, suggesting its suitable emitters in light‐emitting diodes. Moreover, obtained luminescence remain stable under ultraviolet irradiation, water, temperature testing. above observations open new frontier for exploring highlighting their great lighting displays, rather than being limited devices.

Language: Английский

Citations

15
Spin Centers in Vanadium-Doped Cs2NaInCl6 Halide Double Perovskites DOI Creative Commons
Kunpot Mopoung, Anna Dávid, Xianjie Liu

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(2), P. 566 - 571

Published: Jan. 9, 2024

We provide direct evidence for a spin-active V4+ defect center, likely in the form of VO2+ complex, predominantly introduced single crystals vanadium-doped Cs2NaInCl6 halide double perovskites grown by solution-processed hydrothermal method. The has C4v point group symmetry, exhibiting an electron paramagnetic resonance (EPR) spectrum arising from effective spin S = 1/2 and nuclear I 7/2 (corresponding to 51V with nearly 100% natural abundance). determined g-factor hyperfine parameter values are g⊥= 1.973, g∥ 1.945, A⊥ 180 MHz, A∥ 504 principal axis z along ⟨001⟩ crystallographic axis. controlled growth V-doped oxygen-free environment is shown suppress EPR signal. model suggested have VOCl5 octahedral coordination, where one nearest-neighbor Cl– V replaced O2–, compression V–O This VO complex formation competes isolated V3+ substitution In3+, which turn provides means charge-state tuning ions. finding calls better understanding control solution-grown perovskites, critical optimizing tailoring material design solution-processable optoelectronics spintronics.

Language: Английский

Citations

5