Mechanistic Insights into Li+, Bi3+ Co-doped BaCeO3: Eu3+ phosphors - defect passivation and enhanced charge-transfer excited emission
S. V Jasira, C. K. Shilpa, S. S. Ancy, Ann Mary Augustine, A. V. Arunima, Deepthi Panoth, A. M. Huda Thasneem, S. V. Sajith, Pandurengan Sakthivel, Mahesh Dhonde, K. M. Nissamudeen · 2026
Read Mechanistic Insights into Li+, Bi3+ Co-doped BaCeO3: Eu3+ phosphors - defect passivation and enhanced charge-transfer excited emission by S. V Jasira, C. K. Shilpa, S. S. Ancy, Ann Mary Augustine, A. V. Arunima, Deepthi Panoth, A. M. Huda Thasneem, S. V. Sajith, Pandurengan Sakthivel, Mahesh Dhonde, K. M. Nissamudeen (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13438618.txt.
Description
Jasira and a large team tuned a europium-doped barium cerate phosphor. A phosphor is a ceramic that converts ultraviolet light into an orange-red glow. They added lithium and bismuth to fix the oxygen vacancies that waste its light as heat. They made a graded series with gel combustion. Tests confirmed a single-phase orthorhombic perovskite structure throughout.
Co-doping measurably cleaned up the defect landscape. The Urbach energy, a disorder gauge, fell from 0.664 to 0.621 electron volts across the series. Under 321 nanometer excitation, light output nearly doubled at the optimal composition. Emission lifetime lengthened from 1.02 to 1.37 milliseconds as wasteful pathways closed. External quantum efficiency climbed from 38 percent to 51 percent with the best co-doped formulation tested. The authors credit charge-compensated defect healing plus bismuth-mediated coupling to the charge-transfer excitation. They propose the material as a robust ultraviolet-excitable phosphor platform.
Catalog record
| CREATOR | S. V Jasira, C. K. Shilpa, S. S. Ancy, Ann Mary Augustine, A. V. Arunima, Deepthi Panoth, A. M. Huda Thasneem, S. V. Sajith, Pandurengan Sakthivel, Mahesh Dhonde, K. M. Nissamudeen |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 33 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |