Journal
ADVANCED SCIENCE
Volume 10, Issue 20, Pages -Publisher
WILEY
DOI: 10.1002/advs.202207571
Keywords
halide double perovskite nanocrystals; lead-free; rare-earth ions; anti-counterfeiting; optical thermometry; white-light-emitting diodes
Ask authors/readers for more resources
In this study, efficient blue-emitting Sb3+-doped Cs2NaInCl6 nanocrystals (NCs) were selected as the host, and rare-earth (RE) ions (Sm3+, Eu3+, Tb3+, and Dy3+) were incorporated into the host, achieving an excellent PLQY of 80.1%. Femtosecond transient absorption measurement revealed that RE ions served as activator ions and filled deep vacancy defects. These RE ions-doped halide double perovskite NCs exhibited applications in anti-counterfeiting, optical thermometry, and white-light-emitting diodes (WLEDs).
Most lead-free halide double perovskite materials display low photoluminescence quantum yield (PLQY) due to the indirect bandgap or forbidden transition. Doping is an effective strategy to tailor the optical properties of materials. Herein, efficient blue-emitting Sb3+-doped Cs2NaInCl6 nanocrystals (NCs) are selected as host, rare-earth (RE) ions (Sm3+, Eu3+, Tb3+, and Dy3+) are incorporated into the host, and excellent PLQY of 80.1% is obtained. Femtosecond transient absorption measurement found that RE ions not only served as the activator ions but also filled the deep vacancy defects. Anti-counterfeiting, optical thermometry, and white-light-emitting diodes (WLEDs) are exhibited using these RE ions-doped halide double perovskite NCs. For the optical thermometry based on Sm3+-doped Cs2NaInCl6:Sb3+ NCs, the maximum relative sensitivity is 0.753% K-1, which is higher than those of most temperature-sensing materials. Moreover, the WLED fabricated by Sm3+-doped Cs2NaInCl6:Sb3+ NCs@PMMA displays CIE color coordinates of (0.30, 0.28), a luminous efficiency of 37.5 lm W-1, a CCT of 8035 K, and a CRI over 80, which indicate that Sm3+-doped Cs2NaInCl6:Sb3+ NCs are promising single-component white-light-emitting phosphors for next-generation lighting and display technologies.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available