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Inkjet‐Printed Micrometer‐Thick Patterned Perovskite Quantum Dot Films for Efficient Blue‐to‐Green Photoconversion
Author(s) -
Duan Miao,
Feng Zhengyu,
Wu Yongwei,
Yin Yongming,
Hu Zhiping,
Peng Wenxiang,
Li Dongze,
Chen Shujhih,
Lee ChiaYu,
Lien Alan
Publication year - 2019
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201900779
Subject(s) - backlight , materials science , optoelectronics , brightness , quantum dot , perovskite (structure) , oled , nanotechnology , layer (electronics) , optics , liquid crystal display , chemical engineering , physics , engineering
Perovskite materials have attracted great attention as a potential color conversion material in the display field recently. However, preparing a large and thick patterned film remains to be a key challenge. Here, a patterned CsPbBr 3 quantum dot color conversion layer is prepared using the inkjet‐printing and UV‐curing method. The prepared 6 µm film exhibits a uniform morphology without coffee‐ring effect. Green emission is achieved with a brightness of 58 cd m −2 and narrow emission band is achieved using the 345 cd m −2 blue OLED excitation light. Furthermore, only 1.4% of decay in brightness is observed after the film is exposed to ambient environment for 1 month without any protection. Finally, a 6.6 in. active matrix perovskite quantum dot display prototype is demonstrated using the blue OLED backlight with 384 × 300 resolution for the first time.