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Alternative Type Two-Dimensional-Three-Dimensional Lead Halide Perovskite with Inorganic Sodium Ions as a Spacer for High-Performance Light-Emitting Diodes
Wu, C; Wu, T; Yan, YG; McLeod, JA; Wang, YS; Zou, YT; Zhai, TS; Li, JN; Ban, MY; Song, T; Grao, XY; Duhm, S; Sirringhaus, H; Sun, BQ
2019
Source PublicationACS NANO
ISSN1936-0851
Volume13Issue:2Pages:1645—1654
Subtype期刊论文
AbstractTwo-dimensional (2D) lead halide perovskites with long-chain ammonium halides display high photoluminescence quantum yields (PLQYs), because of their size and dielectric confinement, which hold promise for a high-efficiency and low-cost light-emitting diode (LED). However, the presence of an insulating organic long-chain spacer cation (L) dramatically deteriorates the charge transport properties along the out-of-plane nanoplatelet direction or adjacent nanocrystals, which would limit the device performance of the LED. To overcome this issue, we successfully incorporate small alkaline ions such as sodium (Na+) to replace the long organic molecule. Grazing incidence X-ray diffraction measurements verify 2D layer formation with a preferred crystallite orientation. In addition, the incorporated sodium salt also generates amorphous sodium lead bromide (NaPbBr3) in perovskite as spacers to form a nanocrystal-like halide perovskite film. The PLQY is dramatically improved in the sodium-incorporated film because of its enhanced photoluminescence lifetime. Upon incorporation of a low concentration organic additive, this two-dimensional-three-dimensional (2D-3D) perovskite can achieve a compact and uniform film. Therefore, a 2D-3D perovskite achieves a high external quantum efficiency of 15.9% with good operational stability. We develop a type of 2D-3D halide perovskite with various inorganic ions as spacers for promising high-performance optoelectronic devices.
KeywordOPTICAL-PROPERTIES EFFICIENT ENERGY CSPBX3 BR
DOI10.1021/acsnano.8b07632
Indexed BySCI
Language英语
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Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/31463
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Soochow Univ, Joint Int Res Lab Carbon Based Funct Mat & Device, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, 199 Renai Rd, Suzhou 215123, Peoples R China;
2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil SSRF, 239 Zhangheng Rd, Shanghai 201204, Peoples R China;
3.Univ Cambridge, Dept Phys, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England
Recommended Citation
GB/T 7714
Wu, C,Wu, T,Yan, YG,et al. Alternative Type Two-Dimensional-Three-Dimensional Lead Halide Perovskite with Inorganic Sodium Ions as a Spacer for High-Performance Light-Emitting Diodes[J]. ACS NANO,2019,13(2):1645—1654.
APA Wu, C.,Wu, T.,Yan, YG.,McLeod, JA.,Wang, YS.,...&Sun, BQ.(2019).Alternative Type Two-Dimensional-Three-Dimensional Lead Halide Perovskite with Inorganic Sodium Ions as a Spacer for High-Performance Light-Emitting Diodes.ACS NANO,13(2),1645—1654.
MLA Wu, C,et al."Alternative Type Two-Dimensional-Three-Dimensional Lead Halide Perovskite with Inorganic Sodium Ions as a Spacer for High-Performance Light-Emitting Diodes".ACS NANO 13.2(2019):1645—1654.
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