scholarly journals Erratum: Corrigendum: Slow cooling and highly efficient extraction of hot carriers in colloidal perovskite nanocrystals

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Mingjie Li ◽  
Saikat Bhaumik ◽  
Teck Wee Goh ◽  
Muduli Subas Kumar ◽  
Natalia Yantara ◽  
...  
Keyword(s):  
Hot Carriers ◽  
Slow Cooling ◽  
Perovskite Nanocrystals ◽  
Highly Efficient ◽  
Efficient Extraction

scholarly journals Slow cooling and highly efficient extraction of hot carriers in colloidal perovskite nanocrystals

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Mingjie Li ◽  
Saikat Bhaumik ◽  
Teck Wee Goh ◽  
Muduli Subas Kumar ◽  
Natalia Yantara ◽  
...  
Keyword(s):  
Solar Cells ◽  
Semiconductor Nanocrystals ◽  
Hot Carriers ◽  
Slow Cooling ◽  
Perovskite Nanocrystals ◽  
Hot Carrier ◽  
Bulk Film ◽  
High Pump ◽  
Efficient Extraction ◽  
Extremely Thin Absorber

Abstract Hot-carrier solar cells can overcome the Shockley-Queisser limit by harvesting excess energy from hot carriers. Inorganic semiconductor nanocrystals are considered prime candidates. However, hot-carrier harvesting is compromised by competitive relaxation pathways (for example, intraband Auger process and defects) that overwhelm their phonon bottlenecks. Here we show colloidal halide perovskite nanocrystals transcend these limitations and exhibit around two orders slower hot-carrier cooling times and around four times larger hot-carrier temperatures than their bulk-film counterparts. Under low pump excitation, hot-carrier cooling mediated by a phonon bottleneck is surprisingly slower in smaller nanocrystals (contrasting with conventional nanocrystals). At high pump fluence, Auger heating dominates hot-carrier cooling, which is slower in larger nanocrystals (hitherto unobserved in conventional nanocrystals). Importantly, we demonstrate efficient room temperature hot-electrons extraction (up to ∼83%) by an energy-selective electron acceptor layer within 1 ps from surface-treated perovskite NCs thin films. These insights enable fresh approaches for extremely thin absorber and concentrator-type hot-carrier solar cells.

scholarly journals Slow cooling and efficient extraction of C-exciton hot carriers in MoS2 monolayer

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Lei Wang ◽  
Zhuo Wang ◽  
Hai-Yu Wang ◽  
Gustavo Grinblat ◽  
Yu-Li Huang ◽  
...  
Keyword(s):  
Hot Carriers ◽  
Slow Cooling ◽  
Mos2 Monolayer ◽  
Efficient Extraction

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>

Highly efficient extraction of a proton beam by using bent single crystals

2000 ◽  
Vol 43 (1) ◽  
pp. 11-15 ◽  
Author(s):  
A. A. Arkhipenko ◽  
A. G. Afonin ◽  
V. M. Biryukov ◽  
V. A. Gavrilushkin ◽  
V. N. Gres’ ◽  
...  
Keyword(s):  
Single Crystals ◽  
Proton Beam ◽  
Highly Efficient ◽  
Efficient Extraction

scholarly journals Hollow metal halide perovskite nanocrystals with efficient blue emissions

2020 ◽  
Vol 6 (17) ◽  
pp. eaaz5961 ◽  
Author(s):  
Michael Worku ◽  
Yu Tian ◽  
Chenkun Zhou ◽  
Haoran Lin ◽  
Maya Chaaban ◽  
...  
Keyword(s):  
Quantum Confinement Effect ◽  
Visible Spectrum ◽  
Precursor Solution ◽  
Metal Halide ◽  
Synthetic Control ◽  
Light Emitting ◽  
Perovskite Nanocrystals ◽  
Highly Efficient ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

Metal halide perovskite nanocrystals (NCs) have emerged as 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 spectrum. Despite remarkable advances in the field of perovskite NCs, many nanostructures in inorganic NCs have not yet been realized in metal halide perovskites, and producing highly efficient blue-emitting perovskite NCs remains challenging and of great interest. Here, we report the discovery of highly efficient blue-emitting cesium lead bromide (CsPbBr3) perovskite hollow NCs. By facile solution processing of CsPbBr3 precursor solution containing 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 effect results in color tuning of CsPbBr3 NCs from green to blue, with high PLQEs of up to 81%.

scholarly journals Unraveling the Radiative Pathways of Hot Carriers upon Intense Photoexcitation of Lead Halide Perovskite Nanocrystals

ACS Nano ◽  
2019 ◽  
Vol 13 (5) ◽  
pp. 5799-5809 ◽  
Author(s):  
Paris Papagiorgis ◽  
Andreas Manoli ◽  
Sozos Michael ◽  
Caterina Bernasconi ◽  
Maryna I. Bodnarchuk ◽  
...  
Keyword(s):  
Hot Carriers ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
Lead Halide
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