Thermally Stable Self-Trapped Assisted Single-Component White Light from Lead-Free Zero-Dimensional Metal Halide Nanocrystals
- Authors
- Samanta, Tuhin; Viswanath, Noolu Srinivasa Manikanta; Jang, Sung Woo; Min, Jeong Wan; Cho, Han Bin; Han, Joo Hyeong; Im, Won Bin
- Issue Date
- May-2023
- Publisher
- John Wiley and Sons Inc
- Keywords
- Pb-free metal halides; self-trapped emission; single-component white-light emitters; thermal stability; white emission; yellow emission; zero-dimensional nanocrystals
- Citation
- Advanced Optical Materials, v.11, no.9, pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- Advanced Optical Materials
- Volume
- 11
- Number
- 9
- Start Page
- 1
- End Page
- 7
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/191061
- DOI
- 10.1002/adom.202202744
- ISSN
- 2195-1071
- Abstract
- White-light-emitting single-component materials are in high demand for lighting applications. However, achieving white light in single-doped metal halide materials remains a challenge. Herein, for the first time, zero-dimensional Cs3ScCl6:Sb3+(CSC:Sb3+) nanocrystals (NCs) are reported that exhibit bright white-light emission, which is a result of combination of the excessive blue and yellow emissions of carbon dots and spin-forbidden electronic transitions of Sb3+ ions. CSC:Sb3+ NCs exhibit a high photoluminescence quantum yield of 48%. Furthermore, they retain 75% of their original photoluminescence efficiency at 100 °C. This high thermal stability is mainly attributed to its lower dimensionality and high exciton binding energy as they facilitate the creation of stable white light at elevated temperatures. A single-component white-light-emitting diode fabricated using CSC:Sb3+ NCs exhibits a high-color rendering index and luminous efficacy values of 90 and 23 lm W−1 at a high flux current of 200 mA. Therefore, the findings may pave the way for developing the next generation of white-light-emitting devices using a single component of white-light-emitting material.
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