Abstract: The invention provides a method of forming a perovskite material from a plurality of evaporation sources comprising co-subliming from: (i) a first evaporation source comprising a mixture of co-sublimable organic halides, wherein the organic halides comprise: a. a first organic halide comprising an organic cation A; b. a second organic halide comprising an organic cation A? which is different to A and has a larger ionic radius than the first organic cation A; and (ii) a second evaporation source comprising one or more metal halides having the formula (I): B(XyX?1?y)2 (I) wherein B is a divalent metal cation, X and X? are different halides and 0?y<1; and (iii) one or more further organic halides from one or more further evaporation sources; and/or (iv) one or more inorganic halides from one or more further evaporation sources; to form the perovskite material, wherein the perovskite material comprises three or more different cations in the A site.

Abstract: A lock core and key assembly includes a core body, a core plug having a core plug insert-receiving aperture, a core plug insert positioned in the core plug insert-receiving insert, and a key. The core plug insert has a taper and the key has a bow and a shank with a taper that aligns with the taper of the core plug insert.

Abstract: The invention provides a method for producing a perovskite material which comprises: i. The deposition of a first metal halide precursor; and ii. The deposition of a second metal halide precursor, wherein the halide component in the second metal halide precursor is different from that of the first metal halide precursor and the first and second metal halide precursors are deposited separately; and iii. The deposition of an inorganic halide precursor; and/or iv. The deposition of a first organic halide precursor; and v. Optionally, the deposition of a second organic halide precursor which is different from the first organic halide precursor; and vi. Optionally, the deposition of a third organic halide precursor which is different from the first and second organic halide precursors; to form the perovskite material which comprises a mixed halide; wherein steps i., ii., and iii., when present, are carried out by physical vapour deposition.

Abstract: A lock core and key assembly includes a core body, a core plug having a core plug insert-receiving aperture, a core plug insert positioned in the core plug insert-receiving insert, and a key.

Abstract: The invention provides a method of forming a perovskite material from a plurality of evaporation sources comprising co-subliming from: (i) a first evaporation source comprising a mixture of co-sublimable organic halides, wherein the organic halides comprise: a. a first organic halide comprising an organic cation A; b. a second organic halide comprising an organic cation A? which is different to A and has a larger ionic radius than the first organic cation A; and (ii) a second evaporation source comprising one or more metal halides having the formula (I): B(XyX?1-y)2 (I) wherein B is a divalent metal cation, X and X? are different halides and 0?y<1; and (iii) one or more further organic halides from one or more further evaporation sources; and/or (iv) one or more inorganic halides from one or more further evaporation sources; to form the perovskite material, wherein the perovskite material comprises three or more different cations in the A site.

Abstract: A lock core and key assembly includes a core body, a core plug having a core plug insert-receiving aperture, a core plug insert positioned in the core plug insert-receiving insert, and a key.

Abstract: A lock core and key assembly includes a core body, a core plug having a core plug insert-receiving aperture, a core plug insert positioned in the core plug insert-receiving insert, and a key. The core plug insert has a taper and the key has a bow and a shank with a taper that aligns with the taper of the core plug insert.

Abstract: A multi-junction photovoltaic device comprising a layer of metal oxynitride between a first sub-cell and a second sub-cell is disclosed, the first sub-cell having a layer comprising a perovskite light absorber material. In addition, a method of manufacturing said multi junction photovoltaic device is disclosed. The metal oxynitride is preferably titanium oxynitride. Advantageously, the device may be produced in a simple, fast, consistent and inexpensive manner, whilst the properties of the titanium oxynitride layer may be tuned to avoid the occurrence of local shunt paths and to reduce reflection losses.

Abstract: There is provided a perovskite material A perovskite material having the formula (I): AaA?bA?cSn(y)Pb(1-y)X3 (I) wherein A consists of a monovalent cation; A? consists of a monovalent organic cation having an ionic radius greater than 2.53 ?; A? consists of a monovalent inorganic cation; X comprises one or more halide anions; 0<a<1; 0<b<1; 0?c<1; a+b+c=1; and 0<y<1. Also provided is a semiconductor device having a photoactive region comprising a perovskite material as defined herein; a semiconductor device which is a photovoltaic device; and a multijunction photovoltaic device comprising two or more sub-cells, wherein the first sub cell comprises a photovoltaic device as defined herein and a further sub-cell comprising a photoactive layer having a bandgap of between 1.5 and 1.9 eV.

Abstract: There is provided a multi-junction photovoltaic device comprising a first sub-cell disposed over a second sub-cell, the first sub-cell comprising a photoactive region comprising a layer of perovskite material and the second sub-cell comprising a silicon heterojunction (SHJ).

Abstract: A multi-junction photovoltaic device comprising a layer of metal oxynitride between a first sub-cell and a second sub-cell is disclosed, the first sub-cell having a layer comprising a perovskite light absorber material. In addition, a method of manufacturing said multi junction photovoltaic device is disclosed. The metal oxynitride is preferably titanium oxynitride. Advantageously, the device may be produced in a simple, fast, consistent and inexpensive manner, whilst the properties of the titanium oxynitride layer may be tuned to avoid the occurrence of local shunt paths and to reduce reflection losses.

Abstract: There is provided a multi-junction photovoltaic device comprising a first sub-cell disposed over a second sub-cell, the first sub-cell comprising a photoactive region comprising a layer of perovskite material and the second sub-cell comprising a silicon heterojunction (SHJ).

Abstract: There is provided a multi-junction photovoltaic device (100) comprising a first sub-cell (110) disposed over a second sub-cell (120), the first sub-cell comprising a photoactive region comprising a layer of perovskite material and the second sub-cell comprising a silicon heterojunction (SHJ).

Abstract: Aspects of the disclosure can provide a face recognition method of increased robustness. The face recognition method can include receiving a target face image, initializing a registration and a block analysis of the target face image identifying one or more portions of the target face image for face recognition, informing a user of the registration and the block analysis, receiving one or more instructions from the user for operating on the registration and the block analysis, and identifying the target face image from a plurality of face images based on the registration and the block analysis of the target face image when the registration and the block analysis are approved by the user.

Abstract: A prototype biometric identification system is disclosed that indexes a biometric corpus into indexed-corpuses using a set of P prototypes before searching for a probe in a search corpus constructed based on the indexed-corpus. The system may index the biometric corpus based on the prototypes directly or based on prototype-typicality scores.

Abstract: A prototype biometric identification system is disclosed that indexes a biometric corpus into indexed-corpuses using a set of P prototypes before searching for a probe in a search corpus constructed based on the indexed-corpus. The system may index the biometric corpus based on the prototypes directly or based on prototype-typicality scores.