Probing the Exciton Diffusion Length of Short-Ligands Passivated Metal Halide Perovskite Nanocrystal Films

2021 ◽  
Author(s):  
Yuqing Luo ◽  
Shu Zhou ◽  
Zhiya Dang ◽  
Pingqi Gao
Keyword(s):  
Diffusion Length ◽  
Metal Halide ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
Metal Halide Perovskite ◽  
Nanocrystal Films ◽  
Halide Perovskite ◽  
Passivated Metal

scholarly journals Metal halide perovskite nanocrystals: application in high-performance photodetectors

2021 ◽  
Author(s):  
Dan Liu ◽  
Yuxiao Guo ◽  
Meidan Que ◽  
Xingtian Yin ◽  
Jie Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Diffusion Length ◽  
Optical And Electrical Properties ◽  
Perovskite Nanocrystals ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
Metal Halide Perovskite ◽  
Halide Perovskite ◽  
High Absorption Coefficient ◽  
High Absorption

Recently, perovskite nanocrystals (NCs) have become highly promising materials due to their unique optical and electrical properties such as high absorption coefficient, high photoluminescence quantum yield, and long exciton diffusion length.

Hollow Metal Halide Perovskite Nanocrystals with Efficient Blue Emissions

2019 ◽  
Author(s):  
Michael Worku ◽  
Yu Tian ◽  
Chenkun Zhou ◽  
Haoran Lin ◽  
Maya Chaaban ◽  
...  
Keyword(s):  
Precursor Solution ◽  
Visible Spectral Region ◽  
Metal Halide ◽  
Synthetic Control ◽  
Perovskite Nanocrystals ◽  
Highly Efficient ◽  
Quantum Confinement Effects ◽  
Metal Halide Perovskite ◽  
Lead Bromide ◽  
Halide Perovskite

Metal halide perovskite nanocrystals (NCs) have emerged as a new generation light emitting materials with narrow emissions and high photoluminescence quantum efficiencies (PLQEs). Various types of perovskite NCs, e.g. platelets, wires, and cubes, have been discovered to exhibit tunable emissions across the whole visible spectral region. Despite remarkable advances in the field of metal halide perovskite NCs over the last few years, many nanostructures in inorganic NCs have yet been realized in metal halide perovskites and producing highly efficient blue emitting perovskite NCs remains challenging and of great interest. Here we report for the first time the discovery of highly efficient blue emitting cesium lead bromide perovskite (CsPbBr3) NCs with hollow structures. By facile solution processing of cesium lead bromide perovskite precursor solution containing additional ethylenediammonium bromide and sodium bromide, in-situ formation of hollow CsPbBr3 NCs with controlled particle and pore sizes is realized. Synthetic control of hollow nanostructures with quantum confinement effects results in color tuning of CsPbBr3 NCs from green to blue with high PLQEs of up to 81 %.<br><div><br></div>

Determining the exciton diffusion length of copper phthalocyanine in operating planar-heterojunction organic solar cells

2020 ◽  
Vol 89 (3) ◽  
pp. 30201 ◽  
Author(s):  
Xi Guan ◽  
Shiyu Wang ◽  
Wenxing Liu ◽  
Dashan Qin ◽  
Dayan Ban
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Diffusion Length ◽  
Copper Phthalocyanine ◽  
Short Circuit ◽  
Thick Layer ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length

Organic solar cells based on planar copper phthalocyanine (CuPc)/C60 heterojunction have been characterized, in which a 2 nm-thick layer of bathocuproine (BCP) is inserted into the CuPc layer. The thin layer of BCP allows hole current to tunnel it through but blocks the exciton diffusion, thereby altering the steady-state exciton profile in the CuPc zone (zone 1) sandwiched between BCP and C60. The short-circuit current density (JSC) of device is limited by the hole-exciton scattering effect at the BCP/CuPc (zone 1) interface. Based on the variation of JSC with the width of zone 1, the exciton diffusion length of CuPc is deduced to be 12.5–15 nm. The current research provides an easy and helpful method to determine the exciton diffusion lengths of organic electron donors.

Recent progress on defect modulation for highly efficient metal halide perovskite light-emitting diodes

2021 ◽  
Vol 22 ◽  
pp. 100946
Author(s):  
Le Ma ◽  
Boning Han ◽  
Fengjuan Zhang ◽  
Leimeng Xu ◽  
Tao Fang ◽  
...  
Keyword(s):  
Recent Progress ◽  
Light Emitting Diodes ◽  
Metal Halide ◽  
Light Emitting ◽  
Highly Efficient ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

2021 ◽  
pp. 2100438
Author(s):  
Chengxi Zhang ◽  
Jiayi Chen ◽  
Lingmei Kong ◽  
Lin Wang ◽  
Sheng Wang ◽  
...  
Keyword(s):  
Metal Halide ◽  
Core Shell ◽  
Perovskite Nanocrystals ◽  
Metal Halide Perovskite ◽  
Halide Perovskite ◽  
Optoelectronic Applications

scholarly journals Author Correction: Controllable deposition of organic metal halide perovskite films with wafer-scale uniformity by single source flash evaporation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Woocheol Lee ◽  
Jonghoon Lee ◽  
Hyeon-Dong Lee ◽  
Junwoo Kim ◽  
Heebeom Ahn ◽  
...  
Keyword(s):  
Metal Halide ◽  
Single Source ◽  
Organic Metal ◽  
Flash Evaporation ◽  
Wafer Scale ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Efficient All-inorganic Perovskite Light-emitting Diodes Enabled by Manipulating Crystal Orientation

2021 ◽  
Author(s):  
Wenjing Feng ◽  
Kebin Lin ◽  
Wenqiang Li ◽  
Xiangtian Xiao ◽  
Jianxun Lu ◽  
...  
Keyword(s):  
Active Layer ◽  
Crystal Orientation ◽  
Light Emitting Diodes ◽  
Metal Halide ◽  
Device Performance ◽  
Light Emitting ◽  
Inorganic Perovskite ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

Metal halide perovskite light-emitting diodes (PeLEDs) are promising in lighting and display application, and the corresponding device performance is highly dependent on the film quality of the active layer. However,...

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