University of Toronto

Samsung Electronics Co., Ltd.

Huawei Technologies Canada Co., Ltd.

Toyota Motor Europe

Christie Digital Systems Usa, Inc.

Qd Solar Inc.

Sjoerd Hoogland

Edward Hartley Sargent

Oleksandr Voznyy

Makhsud I Saidaminov

Eun Joo Jang

Hyo Sook Jang

Jihyun Min

Ankit Jain

Randy Pat Sabatini

Sachin Kinge

Jixian Xu

Andrew Johnston

Zhenyu Yang

Francisco Pelayo Garcia De Arquer

Edward Sargent

Li Na Quan

Bo Zhang

Larissa Levina

Cao-Thang Dinh

Jea Woong Jo

Edward H Sargent

Jongmin Choi

Quan Lyu

Xinzheng Lan

Hairen Tan

Amin Morteza Najjarian

Peixi Wang

Meng-Jia Sun

Chao Zheng

Fanglin Che

Min Liu

Petar Todorovic

Ya-Kun Wang

Peter Chun

Giovanni Francesco Cotella

Yitong Dong

Kristopher Bicanic

Randy Sabatini

Michael Adachi

Fengjia Fan

Fanglong Yuan

Xueli Zheng

Brandon Sutherland

A semiconductor nanocrystal particle represented by Chemical Formula 1 and having a full width at half maximum (FWHM) of less than or equal to about 30 nanometers (nm) in the emission wavelength spectrum is provided:AA'DE.  Chemical Formula 1 In Chemical Formula 1, A is a first metal including Rb, Cs, or a combination thereof, A′ is an organic substance derived from an ammonium salt, an organic material derived from an organic ligand, or an organic material including a combination thereof, D is a second metal including Sb, Bi, or a combination thereof E is Cl, Br, I, or a combination thereof, 1<x≤3, −1<α<1, 3+α−x>0, −1<β<1, and −1<γ<1.

Semiconductor nanocrystal particle and production methods thereof

Novel 2D organic-inorganic hybrid perovskites, including (4-CF—PMA)PbI, that emit in the blue spectral region, and methods for making same. The CF-substituted material exhibits a ˜0.16 eV larger bandgap than corresponding halogen-substituted materials. This family of materials offers a degree of freedom in tuning 2D perovskites to specific bandgaps for optoelectronic applications. These materials are highly stable, easily synthesized, and do not suffer from phase separation.

2D organic-inorganic hybrid perovskites and uses thereof

The present invention relates to highly polarizable 3D organic perovskites of the general formula ABX, prepared by introducing halogen functional groups in the A-site cation (in which the A and B sites are occupied by organic cations and the X site is a monovalent non-metallic counterion). The (DCl)(NH)(BF)crystal exhibits a strong linear electrooptic (EO) effect with an effective EO coefficient of 20 pmV, which is 10 times higher than that of metal halide perovskites. These 3D organic perovskites are solution processed and compatible with silicon, and illustrate the potential of rationally-designed all-organic perovskites for use in on-chip modulators, electro-optic devices, piezoelectric devices, or silicon photonics devices.

Highly polarizable 3D organic perovskites and electro-optic materials comprising same

The present disclosure provides a method for facet-selective passivation on each crystal facet of colloidal nanocrystals via solution-phase ligand exchange process, thereby providing highly-passivated and colloidally-stable nanocrystal inks. This ligand exchange strategy separately addresses polar and non-polar facets precluding from deleterious nanocrystal aggregation in the colloid. The method involves the introduction of alkali metal organic complexes during metal halide conventional solution exchanges, and one specific example is Na·Ac. Alkali metal ions stabilize and passivate non polar facets whereas polar facets are passivated through metal halides. This strategy leads to a significant decrease in nanocrystal aggregation during and after ligand exchange, and to improved photophysical properties stemming from this. The resulting nanocrystal solid films exhibit improved stability, retain their absorption features, and have a minimized Stokes shift.

Passivation of nanocrystals tailored to different facets, and its application to optoelectronic devices

A semiconductor nanocrystal particle including a transition metal chalcogenide represented by Chemical Formula 1, the semiconductor nanocrystal particle having a size of less than or equal to about 100 nanometers, and a method of producing the same:MMCha&#x2003;&#x2003;Chemical Formula 1

Semiconductor nanocrystal particles and production methods thereof

Methods are disclosed to restore the halide ions lost in the purification (ligand removal) of photoluminescent cesium lead halide or FA lead halide perovskite quantum dots. Quantum dots thus prepared can be used to deposit solid films with high packing density featuring dots with &#x3c;0.4 nm gaps therebetween, low trap density 1/40 of previously reported, high mobility 100&#xd7; previously reported, high photoluminescent quantum yield exceeding 90%, high external quantum yield exceeding 20%, and increased stability under electrical current. The quantum dots are used to formulate inks suitable for ink jet printing, drop casting, spin coating, and other solution-based methods for forming emissive layers used in light producing semiconductor devices.

Bipolar shell resurfaced perovskite quantum dots

A semiconductor nanocrystal particle represented by Chemical Formula 1 and having a full width at half maximum (FWHM) of less than or equal to about 30 nanometers (nm) in the emission wavelength spectrum is provided:AA'DE.&#x2003;&#x2003;Chemical Formula 1In Chemical Formula 1, A is a first metal including Rb, Cs, or a combination thereof, A&#x2032; is an organic substance derived from an ammonium salt, an organic material derived from an organic ligand, or an organic material including a combination thereof, D is a second metal including Sb, Bi, or a combination thereof E is Cl, Br, I, or a combination thereof, 1&#x3c;x&#x2264;3, &#x2212;1&#x3c;&#x3b1;&#x3c;1, 3+&#x3b1;&#x2212;x&#x3e;0, &#x2212;1&#x3c;&#x3b2;&#x3c;1, and &#x2212;1&#x3c;&#x3b3;&#x3c;1.

Disclosed herein are perovskite based optoelectronic devices made entirely via solution-processing at low temperatures (&#x3c;150&#xb0; C.) which provide for simple manufacturing, compatibility with flexible substrates, and perovskite-based tandem devices. These perovskite based optoelectronic devices are produced using an electron transport layer on which the perovskite layer is formed which is passivated using a ligand selected to reduce electron-hole recombination at the interface between the electron transport layer and the perovskite layer.

Contact passivation for perovskite optoelectronics

The present disclosure provides substantially homogeneously dispersed multimetal oxy-hydroxide catalyst comprising at least two metals, at least one metal being a transition metal, and at least a second metal which is structurally dissimilar to at least one metal, such that the multimetal oxy-hydroxide is characterized by being substantially homogeneously dispersed and generally not crystalline. A key feature of the present materials is that the presence of the structurally dissimilar metal results in sufficient strain produced in the final multimetal oxy-hydroxide material to prevent crystallization from occurring. The resulting materials are specifically not annealed at temperatures that would induce crystallization in order to avoid the expected phase segregation that would occur during crystallization.

Homogeneously dispersed multimetal oxy-hydroxide catalysts

An optoelectronic device has an electron transport layer, an active layer, and a hole transport layer. Each of the electron transport layer, the active layer, and the hole transport layer has quantum dots.

All quantum dot based optoelectronic device

A PIN type infrared photodiode including a first electrode, a n-type semiconductor, an atomic layer deposition coating of lead sulfide, a p-type semiconductor and a second electrode, wherein the n-type semiconductor comprises nanowires conformally coated with the atomic layer deposition coating of lead sulfide.

Atomic layer deposition of lead sulfide for infrared optoelectronic devices

There is provided a quantum dot comprising a core comprising a semiconductor and a shell substantially covering the core. The core has a first side and a second side opposite the first side. The core is disposed eccentrically inside the shell such that the shell is thinnest at the first side and thickest at the second side. Moreover, the shell has a thickness of greater than or equal to zero at the first side. The core and the shell have different respective lattice constants such that the shell exerts a straining force on the core. The straining force is configured to modify an excitonic fine structure of the core.

Core-shell quantum dots and method of synthesizing thereof

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Toronto, Canada

Sjoerd Hoogland