成果归属作者：

刘艳改 ; 梅乐夫

成果归属机构：

材料科学与工程学院

作者：

Yang, Chenguang ; Liu, Yangai ; Xie, Ci'an ; Liu, Yukun ; Yu, Zheng ; Mei, Lefu

单位：

China Univ Geosci, Beijing Key Lab Mat Utilizat Nonmet Minerals Solid, Engn Res Ctr, Sch Mat Sci & Technol, Minist Educ Geo, Natl Lab Mineral Mat, Hebei Key Lab Resource Low ca, Beijing 100083, Peoples R China

关键词：

LEAD HALIDE PEROVSKITES; QUANTUM; STABILITY; EMISSION

摘要：

Metal halide perovskite nanocrystals, especially CsPbBr3 nanocrystals (CNCs), show excellent luminescence but suffer from poor stability. Here, we present a simple ligand-assisted strategy using KH550-functionalized kaolin (Kaolin@KH550) as a scalable scaffold for CsPbBr3 nanocrystals. This approach enables low-temperature in situ crystallization, where amino groups coordinate with Pb2+ and kaolin provides spatial confinement, jointly suppressing nonradiative losses. The resulting composites exhibit a solid-state PLQY of 40.8%, retain 70.3% PL intensity at 80 degrees C, and preserve full luminescence after 90 days in air, with a narrow FWHM of 25 nm. Integrated into WLEDs, they deliver a wide color gamut (128.5% NTSC, 96.0% Rec.2020). Moreover, the composites are printable into stable, green-emitting patterns for anti-counterfeiting. This study demonstrates a low-cost mineral-based route for stable, functional perovskite nanocrystals.

基金：

National Natural Science Foundation of China [U22A20130]; China Scholarship Council (CSC) [202406400088]

语种：

英文

DOI：

10.1016/j.materresbull.2025.113860

来源：

MATERIALS RESEARCH BULLETIN,2026():.

出版日期：

2026-03

提交日期：

2025-12-08

引用参考：

Yang, Chenguang; Liu, Yangai; Xie, Ci'an; Liu, Yukun; Yu, Zheng; Mei, Lefu. Surface-modified kaolin for printable CsPbBr3 nanocrystals toward WLED and anti-counterfeiting applications[J]. MATERIALS RESEARCH BULLETIN,2026():.