A Single‐Component Sb/Ho: Cs2Na0.9Ag0.1(In/Bi)Cl6 White Phosphor with a Record Color Rendering Index of 97.4-Reference-Cited by-同舟云学术

A Single‐Component Sb/Ho: Cs₂Na_0.9Ag_0.1(In/Bi)Cl₆ White Phosphor with a Record Color Rendering Index of 97.4

Published:2024-08-08 Issue: Volume: Page:
ISSN:1616-301X
Container-title:Advanced Functional Materials
language:en
Short-container-title:Adv Funct Materials

Author:

Zhang Manjia¹,Jin Shilin¹,Pang Tao²,Lin Bing¹,Wu Tianmin³,Zeng Lingwei⁴,Lei Lei⁵,Chen Daqin¹⁶⁷^ORCID

Affiliation:

1. College of Physics and Energy Fujian Normal University Fuzhou Fujian 350117 China

2. Huzhou Key Laboratory of Materials for Energy Conversion and Storage College of Science Huzhou University Huzhou Zhejiang 313000 China

3. Key Laboratory of Opto‐Electronic Science and Technology for Medicine of Ministry of Education College of Photonic and Electronic Engineering Fujian Normal University Fuzhou Fujian 350117 China

4. School of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan 411201 China

5. Institute of Optoelectronic Materials and Devices China Jiliang University Hangzhou 310018 China

6. Fujian Provincial Collaborative Innovation Center for Advanced High‐Field Superconducting Materials and Engineering Fuzhou Fujian 350117 China

7. Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage Fuzhou Fujian 350117 China

Abstract

AbstractThe study on phosphors‐converted white light‐emitting diodes (pc‐WLEDs) using lead‐free double perovskites (DPs) as single‐component white phosphors is widely concerned. However, the photoluminescence quantum yields (PLQY) of white luminescence and color rendering index (CRI) of WLED are not satisfactory. Herein, a new Sb/Ho: Cs2Na0.9Ag0.1(In/Bi)Cl6 single‐component white phosphor with the highest PLQY of 93% and a record CRI of 97.4 is reported. Experimental data and theoretical calculations evidence that in addition to broadband yellow emission of the self‐trapped exciton (STE) recombination, the material also exhibits blue emission from Sb3+: 3P1→1S0 transition and red one assigned to Ho3+: 5F5→5I8 transition. Steady‐state and time‐resolved PL spectra verify the existence of two energy transfer channels from both Sb3+ and STE to Ho3+ dopants. As a demo, Sb/Ho: Cs2Na0.9Ag0.1(In/Bi) Cl6‐based WLED is constructed, showing excellent comprehensive optical performance with specially improved saturation red index R9 and blue one R12. This work provides a novel single‐component rare‐earth doped DP white phosphor for high CRI full‐spectrum solid‐state lighting.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Fujian Province

Publisher

Wiley

Link

https://onlinelibrary.wiley.com/doi/pdf/10.1002/adfm.202407584

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