Combining SSVD and subsequent heat treatment processes to fabricate high-quality CsPbBr3 perovskite films

被引:0
|
作者
Yeh, Kuan-Chi [1 ]
Chan, Chia-Hua [1 ]
机构
[1] Natl Cent Univ, Grad Inst Energy Engn, 300 Zhongda Rd, Taoyuan 320317, Taiwan
关键词
HALIDE PEROVSKITES; QUANTUM DOTS; CSPBX3; NANOCRYSTALS; BR; CL;
D O I
10.1063/5.0220976
中图分类号
O59 [应用物理学];
学科分类号
摘要
Perovskites, known for their excellent photoluminescence efficiency and color purity, have seen widespread application in flat panel displays and lighting in recent years. Here, we present a process for fabricating CsPbBr3 perovskite film (PeFilm) with high luminescent properties and remarkable weather resistance. By combining single-source vapor deposition (SSVD) with subsequent heat treatment, the quality of PeFilms has been significantly improved. We enhanced the quality of PeFilms by using a thermal annealing process to remove PbBr2 from CsPb2Br5. During annealing, PbBr2 evaporates from PeFilms, changing the crystal phase to CsPbBr3. The heat treatment rearranges atoms between grains, promoting grain growth and fusion, producing larger crystals and reducing defects. The research results demonstrate that the integration of SSVD and appropriate heat treatment enables the fabrication of the CsPbBr3 PeFilm with an emission wavelength of 533 nm, CIE coordinates of (0.1842, 0.7797), and a photoluminescence quantum yield (PLQY) of 52.1%, and even after storing it in atmospheric conditions for 100 days, the PLQY of the CsPbBr3 PeFilm remains above 52%, demonstrating excellent stability.
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页数:9
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