Synthesis and optical properties of Cs4PbBr6 perovskite nanocrystals by the water assisted solid-state reaction (WASSR) method

被引：6

作者：

Kang, Tae Wook ^{[1
]}

Park, Young Ji ^{[1
]}

Jeong, Gyu Jin ^{[1
,2
]}

Hwang, Jonghee ^{[1
]}

Kim, Jin Ho ^{[1
]}

Kim, Jong Su ^{[3
]}

Bae, Byungseo ^{[4
]}

Tota, Kenji ^{[5
]}

Kim, Sun Woog ^{[1
]}

机构：

[1] Korea Inst Ceram Engn & Technol, Opt & Elect Component Mat Ctr, Elect Convergence Mat Div, Jinju 52851, South Korea

[2] Gyeongsang Natl Univ, Div Mat Sci & Engn & Convergence Technol, Jinju 52828, South Korea

[3] Pukyong Natl Univ, Dept Display Sci & Engn, Busan 48513, South Korea

[4] Yeongwol Ind Promot Agcy, Adv Resources Team, Gangwon Do 26240, South Korea

[5] Niigata Univ, Grad Sch Sci & Technol 5, 8050 Ikarashi 2 Cho, Niigata 9502181, Japan

来源：

INORGANIC CHEMISTRY FRONTIERS | 2021年 / 8卷 / 08期

关键词：

ROOM-TEMPERATURE SYNTHESIS; LIGHT-EMITTING-DIODES; QUANTUM DOTS; DEVICES; CSPBX3;

D O I：

10.1039/d0qi01451f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Green-emitting Cs4PbBr6 nanocrystals were synthesized by the water-assisted solid-state reaction method for the first time. Although CsPbBr3 phases were observed in the X-ray diffraction (XRD) patterns of the perovskite nanocrystal samples as impurities, the XRD patterns of the samples could be well indexed to the trigonal Cs4PbBr6 structure. The Cs4PbBr6 perovskite nanocrystals showed a bright green emission with a narrow emission band centered at 518 nm with a full width at half-maximum of 26 nm. The photoluminescence quantum yield (PLQY) of the Cs4PbBr6 nanocrystals was 36.8%. The Cs4PbBr6 nanocrystal powder showed excellent durability at 85 degrees C and 85% humidity for 24 h, and retained 82% of the initial PL intensity. The Cs4PbBr6 nanocrystal film light-emitting diode chip showed a luminous efficacy of 30.6 lm W-rad(-1).

引用

页码：2036 / 2041

页数：6

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