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Light‐Emitting Diodes: All‐Inorganic CsPbI 3 Perovskite Phase‐Stabilized by Poly(ethylene oxide) for Red‐Light‐Emitting Diodes (Adv. Funct. Mater. 16/2018)
Author(s) -
Jeong Beomjin,
Han Hyowon,
Choi Yung Ji,
Cho Sung Hwan,
Kim Eui Hyuk,
Lee Seung Won,
Kim Jong Sung,
Park Chanho,
Kim Dongho,
Park Cheolmin
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201870102
Subject(s) - materials science , perovskite (structure) , diode , iodide , ethylene oxide , phase (matter) , light emitting diode , crystallization , oxide , optoelectronics , chemical engineering , ethylene , photochemistry , inorganic chemistry , catalysis , polymer , organic chemistry , copolymer , composite material , metallurgy , chemistry , engineering
Insufficient phase stability prevents the use of all‐inorganic cesium lead iodide perovskite in light‐emitting devices. A small quantity of poly(ethylene oxide) efficiently promotes formation of the black α‐phase while inhibiting formation of the undesired yellow δ‐phase, as demonstrated by Cheolmin Park and co‐workers in article number 1706401 . This approach for controlling perovskite crystallization will enable high‐quality films with excellent characteristics.