Provided is a photoelectric conversion element including: a first electrode that includes a photosensitive layer containing a light absorbing agent on a conductive support; and a second electrode that is opposite to the first electrode. The light absorbing agent includes a compound having a perovskite-type crystal structure that includes a cation of an element of Group 1 in the periodic table or a cationic organic group A, a cation of a metal atom M other than the element of Group 1 in the periodic table, and an anion of an anionic atom or atomic group X. A hole transport layer, which includes a hole transporting material, is provided between the first electrode and the second electrode. The hole transporting material includes a compound represented by any one of the following Formulae (1) to (4).

##STR00001##

The invention relates to a composition for organic electroluminescent element, which comprises: a solvent; and a compound group for organic electroluminescent element that is constituted of at least two kinds of compounds which each have a molecular weight of 3,000 or less and have a structure comprising a plurality of aromatic ring groups linked to each other, wherein the compound group comprises: a compound 1; and another compound n satisfying a specific condition.

The invention relates to a composition for organic electroluminescent element, which comprises: a solvent; and a compound group for organic electroluminescent element that is constituted of at least two kinds of compounds which each have a molecular weight of 3,000 or less and have a structure comprising a plurality of aromatic ring groups linked to each other, wherein the compound group comprises: a compound 1; and another compound n satisfying a specific condition.

The present specification describes a multicyclic aromatic ring compound having a novel structure and an organic light emitting device using the same.

The present specification describes a multicyclic aromatic ring compound having a novel structure and an organic light emitting device using the same.

The present invention discloses an organic electronic material, belonging to the organic light-emitting device (OLED) display materials field. The organic electronic material in the present invention has a structural formula (I), having good thermal stability, high luminous efficiency, high purity of light emission. The OLED made by this kind of organic light-emitting material has the advantages of excellent organic light-emitting efficiency, excellent color purity and long service life.

##STR00001##

An organic light-emitting device includes a first electrode and a second electrode facing the first electrode. An organic layer is between the first electrode and the second electrode. The organic layer includes an emission layer. A hole transport region is between the first electrode and the emission layer. A first auxiliary layer is between the hole transport region and the emission layer. The first auxiliary layer includes a first compound represented by Formula 1

##STR00001##

Provided are compositions and methods for visualizing the skeletal tissues of a biological specimen, comprising treating the specimen with a calcium chelating agent, a staining solution, and a clearing solution.

The present invention relates to the use of aromatic boronic acid or borinic acid derivatives in organic electronic devices, in particular electroluminescent devices.

The present invention relates to the use of aromatic boronic acid or borinic acid derivatives in organic electronic devices, in particular electroluminescent devices.