TY - JOUR
T1 - Novel cyan emissive organic–inorganic copper halides
T2 - Phase transition, flexible large-area composite film, and multifunctional luminescent applications
AU - Xie, Lingling
AU - Liu, Zheng
AU - Lv, Ning
AU - Liu, Zhe
AU - Yang, Henan
AU - Pi, Huihui
AU - Li, Xitao
AU - Li, Siyi
AU - Xiao, Jiawen
AU - Wang, Zhenguang
AU - Lin, Zhengguo
AU - Wang, Yongtian
AU - Chen, Bingkun
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/1/25
Y1 - 2025/1/25
N2 - Organic-inorganic copper halides (OICHs) are attractive due to their outstanding photophysical properties, low toxicity and high abundance. However, the absence of the high-energy emissive OICHs significantly hinders the full-spectrum white light emitting diode (WLED) for high-quality applications and the preparation of large-area films still faces challenges. Herein, we have synthesized a novel cyan emissive (C19H18P)2CuI3 by lowering the inorganic anion skeletons dimension in yellow emissive (C19H18P)2Cu4I6, and proposed an UV curing technology to fabricate large-area composite films (10*10 cm2), which is one of the largest reported films based on OICHs. The structure and luminescent properties of (C19H18P)2CuI3 could transform into that of (C19H18P)2Cu4I6 under methanol treatment. Notably, the PLQYs of (C19H18P)2CuI3 based cyan and (C19H18P)2Cu4I6 based yellow composite films are 78.2% and 96.1%, respectively. Moreover, the cyan and yellow composite films exhibit desirable endurance to air, whose PLQYs could remain 94.12% and 96.26% of its initial value stored in air for 45 days. Remote WLED with high luminous efficiency of 74.44 lm W−1 and powders based cyan-gap free WLED have been fabricated. Additionally, the (C19H18P)2CuI3 and (C19H18P)2Cu4I6 based compounds are used as luminescent pastes for encryption applications, and the two composite films are also used for X-ray detection and imaging.
AB - Organic-inorganic copper halides (OICHs) are attractive due to their outstanding photophysical properties, low toxicity and high abundance. However, the absence of the high-energy emissive OICHs significantly hinders the full-spectrum white light emitting diode (WLED) for high-quality applications and the preparation of large-area films still faces challenges. Herein, we have synthesized a novel cyan emissive (C19H18P)2CuI3 by lowering the inorganic anion skeletons dimension in yellow emissive (C19H18P)2Cu4I6, and proposed an UV curing technology to fabricate large-area composite films (10*10 cm2), which is one of the largest reported films based on OICHs. The structure and luminescent properties of (C19H18P)2CuI3 could transform into that of (C19H18P)2Cu4I6 under methanol treatment. Notably, the PLQYs of (C19H18P)2CuI3 based cyan and (C19H18P)2Cu4I6 based yellow composite films are 78.2% and 96.1%, respectively. Moreover, the cyan and yellow composite films exhibit desirable endurance to air, whose PLQYs could remain 94.12% and 96.26% of its initial value stored in air for 45 days. Remote WLED with high luminous efficiency of 74.44 lm W−1 and powders based cyan-gap free WLED have been fabricated. Additionally, the (C19H18P)2CuI3 and (C19H18P)2Cu4I6 based compounds are used as luminescent pastes for encryption applications, and the two composite films are also used for X-ray detection and imaging.
KW - Large-area flexible films
KW - Luminescent pastes
KW - Organic-inorganic copper halides
KW - Remote light emitting diode
KW - X-ray detection and imaging
UR - http://www.scopus.com/inward/record.url?scp=85214292456&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2025.178495
DO - 10.1016/j.jallcom.2025.178495
M3 - Article
AN - SCOPUS:85214292456
SN - 0925-8388
VL - 1012
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 178495
ER -