scholarly journals Halide perovskite nanocrystal arrays: Multiplexed synthesis and size-dependent emission

2020 ◽  
Vol 6 (39) ◽  
pp. eabc4959
Author(s):  
Jingshan S. Du ◽  
Donghoon Shin ◽  
Teodor K. Stanev ◽  
Chiara Musumeci ◽  
Zhuang Xie ◽  
...  
Keyword(s):  
Light Emitting ◽  
Size Dependent ◽  
Integrated Devices ◽  
Poor Understanding ◽  
Fixed Composition ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Photoluminescence Studies ◽  
The Relationship ◽  
Size Controlled

Halide perovskites have exceptional optoelectronic properties, but a poor understanding of the relationship between crystal dimensions, composition, and properties limits their use in integrated devices. We report a new multiplexed cantilever-free scanning probe method for synthesizing compositionally diverse and size-controlled halide perovskite nanocrystals spanning square centimeter areas. Single-particle photoluminescence studies reveal multiple independent emission modes due to defect-defined band edges with relative intensities that depend on crystal size at a fixed composition. Smaller particles, but ones with dimensions that exceed the quantum confinement regime, exhibit blue-shifted emission due to reabsorption of higher-energy modes. Six different halide perovskites have been synthesized, including a layered Ruddlesden-Popper phase, and the method has been used to prepare functional solar cells based on single nanocrystals. The ability to pattern arrays of multicolor light-emitting nanocrystals opens avenues toward the development of optoelectronic devices, including optical displays.

Performance and Stability Improvements in Metal Halide Perovskite with Intralayer Incorporation of Organic Additives

2021 ◽  
Author(s):  
Yanan Li ◽  
Matthew Dailey ◽  
Patrick Lohr ◽  
Adam Printz
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Metal Halide ◽  
Organic Additives ◽  
Semiconducting Materials ◽  
Light Emitting ◽  
Metal Halide Perovskite ◽  
Wide Range ◽  
Halide Perovskites ◽  
Halide Perovskite

Metal halide perovskites are emerging semiconducting materials with a wide range of applications, including photovoltaics, thin-film transistors, and light-emitting diodes. A key advantage of perovskites over more established semiconductor technologies...

Luminescence enhancement of lead halide perovskite light-emitting diodes with plasmonic metal nanostructures

Nanoscale ◽  
2021 ◽  
Author(s):  
Mingfei Zheng ◽  
Guojia Fang
Keyword(s):  
Light Emitting Diodes ◽  
Metal Nanostructures ◽  
Luminescent Materials ◽  
Luminescence Enhancement ◽  
Light Emitting ◽  
Practical Applications ◽  
Light Emitter ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide

Metal halide perovskites, as a newly emerging light-emitter, have been attracting considerable attention on luminescent materials and devices, due to their superior optoelectronic properties and potential practical applications. Recently, perovskite...

B-Site doped lead halide perovskites: synthesis, band engineering, photophysics, and light emission applications

2019 ◽  
Vol 7 (10) ◽  
pp. 2781-2808 ◽  
Author(s):  
Binbin Luo ◽  
Fei Li ◽  
Ke Xu ◽  
Yan Guo ◽  
Ying Liu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Light Emission ◽  
Chemical Formula ◽  
Light Emitting ◽  
Band Engineering ◽  
General Chemical ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide

Lead halide perovskite (LHP) semiconductors with the general chemical formula ABX3 are now being widely investigated for a variety of applications including but not limited to high-efficiency photovoltaics (PVs) and light-emitting diodes (LEDs).

Engineering Electrodes and Metal Halide Perovskite Materials for Flexible/Stretchable Perovskite Solar Cells and Light-Emitting Diodes

2021 ◽  
Author(s):  
Kyung-Geun Lim ◽  
Tae-Hee Han ◽  
Tae-Woo Lee
Keyword(s):  
Solar Cells ◽  
Electronic Devices ◽  
Perovskite Solar Cells ◽  
Metal Halide ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Perovskite Materials ◽  
Metal Halide Perovskite ◽  
Halide Perovskites ◽  
Halide Perovskite

Organic-inorganic hybrid metal halide perovskites have excellent optoelectronic properties and are soft and resilient; therefore, they are appropriate for use in flexible and stretchable electronic devices. Commercialization of these perovskite...

Quasi-2D lead-free halide perovskite using superalkali cations for red-light-emitting diodes

Nanoscale ◽  
2021 ◽  
Author(s):  
Tingwei Zhou ◽  
Anlong Kuang
Keyword(s):  
Light Emitting Diodes ◽  
Red Light ◽  
Lead Free ◽  
Two Dimensional ◽  
Light Emitting ◽  
Halide Perovskites ◽  
Halide Perovskite

Two dimensional halide perovskites have attracted intense attention, but there is no study to consider the quasi-2D lead-free perovskites with superalkali cations as potential emitting materials. Herein, the quasi-2D [C6H5(CH2)2NH3]2H5O2Sn2Br7...

scholarly journals A-Site Cation Engineering for Efficient Blue-Emissive Perovskite Light-Emitting Diodes

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6689
Author(s):  
Jong Hyun Park ◽  
Chung Hyeon Jang ◽  
Eui Dae Jung ◽  
Seungjin Lee ◽  
Myoung Hoon Song ◽  
...  
Keyword(s):  
Phase Stability ◽  
Light Emitting Diodes ◽  
Blue Emission ◽  
Light Emitting ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
A Site ◽  
Bandgap Tuning ◽  
Excellent Color ◽  
Selection Of

Metal halide perovskites have been investigated for the next-generation light-emitting materials because of their advantages such as high photoluminescence quantum yield (PLQY), excellent color purity, and facile color tunability. Recently, red- and green-emissive perovskite light-emitting diodes (PeLEDs) have shown an external quantum efficiency (EQE) of over 20%, whereas there is still room for improvement for blue emissive PeLEDs. By controlling the halide compositions of chloride (Cl−) and bromide (Br−), the bandgap of perovskites can be easily tuned for blue emission. However, halide segregation easily occurrs in the mixed-halide perovskite under light irradiation and LED operation because of poor phase stability. Here, we explore the effect of A-site cation engineering on the phase stability of the mixed-halide perovskites and find that a judicious selection of low dipole moment A cation (formamidinium or cesium) suppresses the halide segregation. This enables efficient bandgap tuning and electroluminescence stability for sky blue emissive PeLEDs over the current density of 15 mA/cm2.

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

Highly Emissive Halide Perovskite Nanocrystals: From Lead to Lead-Free

CrystEngComm ◽  
2021 ◽  
Author(s):  
Chunlong Li ◽  
Jie Li ◽  
Zhengping Li ◽  
Huayong Zhang ◽  
Yangyang Dang ◽  
...  
Keyword(s):  
Charge Carriers ◽  
Lead Free ◽  
Quantum Yields ◽  
Local Management ◽  
Perovskite Nanocrystals ◽  
Halide Perovskites ◽  
Halide Perovskite

Nanostructured halide perovskites have highly yielded record LEDs due to their higher versatility in the local management of charge carriers, which has enabled photoluminescence quantum yields (PLQYs) close to 100%....

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