A perovskite-polymer composite comprising a perovskite and a polymer, wherein the polymer has a structural unit comprising a thiourea (—HN(C═S)NH—) fragment and a (—R.sup.1—O—R.sup.2—) fragment, wherein R.sup.1 and R.sup.2 are each independently a C.sub.1-C.sub.6 alkyl or a cycloalkyl linker; a mechanically robust and self-healable solar cell comprising same; and a method of making same.

Fullerene derivative blends are described herein. The blends are useful in electronic applications such as, e.g., organic photovoltaic devices.

An infrared photodiode includes a first electrode including a reflective layer, a second electrode facing the first electrode, and a photoelectric conversion layer between the first electrode and the second electrode. The photoelectric conversion layer includes an infrared absorbing material. A maximum absorption wavelength of the infrared absorbing material in a solution state is greater than about 700 nm and less than or equal to about 950 nm. The infrared photodiode is configured to exhibit an external quantum efficiency (EQE) spectrum in a wavelength region of greater than or equal to about 1000 nm.

A solar cell device is presented. The solar cell device comprises a layered structure comprising an electron transport layer and a hole transport layer and a heterojunction interface region between the electron transport and hole transport layers configured to define at least one charge generation region forming at least one junction between them, wherein at least one of the electron transport layer and the hole transport layer comprises at least one modulated doping layer at a predetermined distance from said at least one junction, said at least one modulated doping layer thereby inducing variation of an energy band structure at a vicinity of said at least one junction generating electric field applied to charge carriers increasing efficiency of generation and/or collection of the charge carriers.

The process comprises treating 90-190 g titanium (IV) chloride in 10-100 ml de-ionized water for preparing Titanium cation (Ti.sup.4+); treating 130-275 ml potassium persulfate in 10-100 ml double-distilled water and keeping at constant temperature to obtain sulphate/oxide; dipping substrates into titanium (IV) chloride solution and re-dipping in de-ionized water to remove loosely bonded ions, if could be any; dipping substrates into potassium persulfate solution and re-dipping in de-ionized water to remove loosely bonded ions, if could be any, and keeping at 50-90° C. for complete one cycle; treating obtained Titanium cation (Ti.sup.4+) with sulphate/oxide and obtaining whitish layer on the substrate surface by necked eyes after about 10-15 cycles, suggesting initiation of film formation, wherein the deposition thickness of TiO.sub.2 layer is increased from 0.3-2.0-micron on determined 5-50 deposition cycles; and rinsing deposited films with de-ionized water and air annealed at 400-600° C. temperature to obtain anatase TiO.sub.2.

The technology of this application relates to a cell assembly and a method for preparing a cell assembly. The cell assembly includes a first subcell, a second subcell adjacent to the first subcell, and a bottom electrode. Both the first subcell and the second subcell include a P-type layer and an N-type layer, and a light-harvesting layer located between the P-type layer and the N-type layer. The P-type layer of the first subcell is connected to the N-type layer of the second subcell by using the bottom electrode. A connection manner between subcells is provided. Compared with a current manner in which P1, P2, and P3 gaps are formed between subcells through cutting to implement interconnection, geometrical optical loss brought by interconnection between the subcells can be reduced.

Described herein is a printed photovoltaic cell comprising an anode; an LEP printed cathode; and an LEP printed photovoltaic layer disposed between the anode and the cathode. The photovoltaic layer comprises a material with a perovskite structure having a chemical formula selected from ABX.sub.3 and A.sub.2BX.sub.6 and a thermoplastic resin comprising a copolymer of an alkylene monomer and a monomer having acidic side groups; and/or a copolymer of an alkylene monomer and an ethylenically unsaturated monomer comprising an epoxide; and/or a copolymer of an alkylene monomer, an ethylenically unsaturated monomer comprising an epoxide, and a monomer selected from a monomer having acidic side groups, a monomer having ester side groups and a mixture thereof. The printed cathode comprises: a thermoplastic resin; and electrically conductive metal particles. Also described herein is a method of producing the printed photovoltaic cell and an ink set for use in the method.

The present disclosure pertains to an image sensor, including: a first photosensitive layer (2) for sensing blue light; a second photosensitive layer (3) for sensing green light; a third photosensitive layer (4) for sensing red light; and a fourth photosensitive layer (5) for sensing infrared light, wherein the first, second, third and fourth photosensitive layer are stacked on each other and each comprise a Perovskite material.

The present invention relates to a structure of photodiode, which comprises a substrate, a first electrode, an electron transport layer, a photoactive layer, a filter layer, and a second electrode. The first electrode is disposed on the substrate. The electron transport layer is disposed on the first electrode. The photoactive layer is disposed on the electron transport layer. The photoactive layer has a first energy gap value. The filter layer is disposed on the photoactive layer and has a second energy gap value. The second electrode is disposed on the filter layer. The second energy gap value is greater than the first energy gap value. The ratio of the second energy gap value to the first energy gap value is an energy gap ratio. The energy gap ratio is greater than 1 and less than or equal to 3.

Photovoltaic module comprising a plurality of multijunction photovoltaic cells, at least one of said multijunction photovoltaic cells comprising: a first photovoltaic sub-cell extending over a first predetermined area; a second photovoltaic sub-cell provided on said first photovoltaic sub-cell and in electrical connection therewith, said second photovoltaic sub-cell extending over a second predetermined area which is smaller than said first predetermined area so as to define at least one zone in which said first photovoltaic sub-cell is uncovered by said second photovoltaic sub-cell; an electrically-insulating layer situated upon said first photovoltaic sub-cell in at least a part of said zone; and an electrically-conductive layer situated upon at least part of said electrically-insulating layer and in electrical connection with a surface of said second photovoltaic sub-cell, wherein at least one of said multijunction photovoltaic cells is electrically connected to at least one other of said multijunction photovoltaic cells by means of at least one electrical interconnector electrically connected to said electrically-conductive layer in said zone.