A core-shell particle which includes a core-shell structure includes an inorganic nanoparticle having a light wavelength conversion ability and a coating layer formed on a surface of the inorganic nanoparticle and formed of an inorganic perovskite type substance.

Organic semiconductor compositions (OSCs) compatible with laser printing techniques are described herein. In being compatible with laser printing techniques, the OSCs are in particulate form and generally comprise an organic semiconductor component and carrier. The organic semiconductor component can comprise any small molecule semiconductor or polymeric semiconductor not inconsistent with the laser printing methods.

Hole transporting material obtained through a process comprising: reacting at least one heteropoly acid containing at least one transition metal belonging to group 5 or 6 of the Periodic Table of the Elements; with an equivalent amount of at least one salt or one complex of a transition metal belonging to group 5 or 6 of the Periodic Table of the Elements with an organic anion, or with an organic ligand;
in the presence of at least one organic solvent selected from alcohols, ketones, esters. Said hole transporting material can be advantageously used in the construction of photovoltaic devices (or solar devices) such as, for example, photovoltaic cells (or solar cells), photovoltaic modules (or solar modules), either on a rigid support, or on a flexible support. Furthermore, said hole transporting material can be advantageously used in the construction of Organic Light Emitting Diodes (OLEDs), or of Organic Field Effect Transistors (OFETs). In particular, said hole transporting material can be advantageously used in the construction of a polymer photovoltaic cell (or solar cell) with an inverted structure.

Provided herein is a sequentially processed fabrication method involving donor-acceptor conjugated polymers with temperature dependent aggregation (TDA) useful for the preparation of organic semiconductors with improved properties.

Aspects concern an organic metal-halide perovskite precursor including a divalent metal cation, a halide anion, and an alkylamine, wherein the divalent metal cation is connected to a nitrogen atom of the alkylamine via a covalent bond. Further aspects concern a process for the production of the organic metal-halide perovskite precursor and a perovskite ink including the organic metal-halide perovskite precursor and a non-coordinating solvent.

To improve an SN ratio of a photoelectric conversion element. A photoelectric conversion element (10) includes an anode (12), a cathode (16), an active layer (14) provided between the anode and the cathode, and a hole transport layer (13) provided between the anode and the active layer. The active layer includes a p-type semiconductor material, which is a polymer compound having an absorption peak wavelength of 900 nm or higher, and an n-type semiconductor material, and an energy gap between an LUMO of the n-type semiconductor material contained in the active layer and a HOMO of a hole transport material contained in the hole transport layer is less than 0.9 eV.

Provided are a perovskite optoelectronic device containing an exciton buffer layer, and a method for manufacturing the same. The optoelectronic device of the present invention comprises: an exciton buffer layer in which a first electrode, a conductive layer disposed on the first electrode and comprising a conductive material, and a surface buffer layer containing fluorine-based material having lower surface energy than the conductive material are sequentially deposited; a photoactive layer disposed on the exciton buffer layer and containing a perovskite photoactive layer; and a second electrode disposed on the photoactive layer. Accordingly, a perovskite is formed with a combined FCC and BSS crystal structure in a nanoparticle photoactive layer. The present invention can also form a lamellar or layered structure in which an organic plane and an inorganic plane are alternatively deposited; and an exciton can be bound by the inorganic plane, thereby being capable of expressing high color purity.

The present disclosure provides a printable curved-surface perovskite solar cell, including a curved-surface conductive substrate, a porous electron transport layer, a porous insulation layer, a porous back electrode layer and a perovskite filler. The curved-surface conductive substrate includes a curved-surface transparent substrate and a conductive layer deposited on the curved-surface transparent substrate. The porous electron transport layer, the porous insulation layer and the porous back electrode layer are sequentially deposited on the conductive layer from bottom to top. The perovskite filler is filled in pores of the porous electron transport layer, the porous insulation layer and the porous back electrode layer. The present disclosure further provides a method for preparing the printable curved-surface perovskite solar cell.

Compositions comprise a perovskite and a non-perovskite. Perovskites comprise A.sub.xA′.sub.yA″.sub.(1−x−y)BX.sub.3, and non-perovskites may comprise A″, B and X, where A is a first cation, A′ is a second cation, A″ is a third cation, B is a fourth cation, X is an anion. In some instances, A, A′, and A″ are each independently (NH.sub.2).sub.2CH.sup.+, CH.sub.3NH.sub.3.sup.+, Cs.sup.+, Rb.sup.+, or (NH.sub.2).sub.2(C═NH.sub.2).sup.+, with the proviso that A, A′, and A″ are each different. The perovskite may have a first crystal structure in which the anion is corner-sharing, the non-perovskite may have a second crystal structure comprising at least one of an orthorhombic structure, a hexagonal structure, or a perovskite-like structure, and 1−x−y may be greater than about 0.15.

Compositions comprise a perovskite and a non-perovskite. Perovskites comprise A.sub.xA′.sub.yA″.sub.(1−x−y)BX.sub.3, and non-perovskites may comprise A″, B and X, where A is a first cation, A′ is a second cation, A″ is a third cation, B is a fourth cation, X is an anion. In some instances, A, A′, and A″ are each independently (NH.sub.2).sub.2CH.sup.+, CH.sub.3NH.sub.3.sup.+, Cs.sup.+, Rb.sup.+, or (NH.sub.2).sub.2(C═NH.sub.2).sup.+, with the proviso that A, A′, and A″ are each different. The perovskite may have a first crystal structure in which the anion is corner-sharing, the non-perovskite may have a second crystal structure comprising at least one of an orthorhombic structure, a hexagonal structure, or a perovskite-like structure, and 1−x−y may be greater than about 0.15.