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• W4313333003 abstract "Lanthanide ions (Ln3+) are well-known dopants for controlling the optoelectronic properties of double perovskites (DPs). However, the excitation energy of Ln3+-doped Cs2AgInCl6 being too high (∼250–290 nm) limits its direct excitation by commercial UV light-emitting diodes (≥365 nm). To overcome this challenge, we employed Bi3+ as a sensitizer to induce the emission of Sm3+ at much lower excitation energy in Sm3+–Bi3+ codoped Cs2AgInCl6 DP nanocrystals (NCs). Spectral analysis shows that a trace amount of Bi3+ (∼1%) doping provides dual emission of self-trapped excitons (STEs) and characteristic emissions of Sm3+ assigned to 4G5/2 to 6HJ (J = 5/2, 7/2, 9/2, and 11/2) transitions with 368 nm excitation energy. Transient absorption spectroscopic results revealed the existence of nonradiative energy transfer from STE states. Subsequently, we propose a mechanism to explain the formation of energy-transfer channels from STEs to excited states of Sm3+. Our study demonstrates that Bi3+ can efficiently sensitize Sm3+ to modify the optical properties of lead-free DP NCs to expand their luminescence application." @default.
• W4313333003 created "2023-01-06" @default.
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• W4313333003 date "2022-12-29" @default.
• W4313333003 modified "2023-10-16" @default.
• W4313333003 title "Self-Trapped Excitons Mediated Energy Transfer to Sm³⁺ in Cs₂AgIn_{(1–<i>x</i>)}Sm_<i>x</i>Cl₆:Bi Double Perovskite Nanocrystals" @default.
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• W4313333003 doi "https://doi.org/10.1021/acs.jpcc.2c07944" @default.
• W4313333003 hasPublicationYear "2022" @default.
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