Korea Institute of Science and Technology

Hae Jung Son

Sungmin Park

Min Jae Ko

Jai Kyeong Kim

Doh-Kwon Lee

Jin Young Kim

Hong Gon Kim

Bong Soo Kim

Phillip Lee

Hyo Sang Lee

Injeong Shin

Sohyun Park

Jeung-hyun Jeong

Taehee Kim

Hyeonggeun Yu

Jea Woong Jo

Ji Yeong Kim

Hyojung Kim

So Hyun Park

Inyoung Jeong

Jin Ah Lee

Jong Baek Park

Hee Suk Jung

Jae Hoon Yun

Hwa Young Jin

Gyoungsik Kim

Hyunjung Jin

Sung-yoon Joe

Seongwon Yoon

Jin Joo

Eul-Yong Shin

The present disclosure relates to a ternary photoactive layer composition and an organic solar cell including the same. According to the present disclosure, excessive crystal growth and aggregation can be prevented during large-area coating of a photoactive layer, uniform morphology can be achieved without significant phase separation, an organic solar cell with superior photovoltaic cell characteristics can be realized, and superior performance may be maintained even after long-term exposure to heat by preventing the morphological change of the photoactive layer.

Ternary photoactive layer composition and organic solar cell comprising same

A self-healing conjugated polymer is disclosed. The self-healing conjugated polymer has hydrogen bonding functional groups introduced into its side chains. Due to this structure, the conjugated polymer is imparted with the ability to recover through self-healing while maintaining its inherent properties (for example, physical and electrical properties). Based on this effective self-healing ability, the conjugated polymer is expected to find application as a biomaterial, a pharmaceutical material, a nonlinear optical material or an organic electronic material.

Self-healing conjugated polymer, composition for forming self-healing photoactive layer including the conjugated polymer and organic solar cell including photoactive layer formed using the composition

A conjugated polymer that is an electron donor, that is soluble without aggregation, that is solution-coatable and is dryable at a temperature below 70&#xb0; C., that has an energy conversion efficiency of 7 % or more over an area of 5 cmor more, and that is composed of a repeating unit represented by Chemical Formula 1A below:  where x is a real number from 0.1 to 0.2; and n is an integer from 1 to 1,000. The conjugated polymer forms a uniform thin film over a large area of, for example, an organic solar cell, without a heat treatment due to superior solubility and crystallinity at low temperature and, thus, allows fabrication of an organic solar cell with high efficiency at a low temperature.

Conjugated polymer for a photoactive layer, a coating composition including the conjugated polymer, and an organic solar cell including the photoactive layer

An organic solar cell includes a substrate; a first electrode; a second electrode disposed opposite the first electrode; a photoactive layer that is disposed between the first electrode and the second electrode, and that comprises n-type organic semiconductor material and p-type organic semiconductor material; and an intermediate layer that is disposed on at least one surface of the photoactive layer and that contains a compound represented by Formula 1 below: 

Organic solar cells with increased photostability

Disclosed is a method for adsorbing a dye for a dye-sensitized solar cell. The method includes: coating a paste including metal oxide nanoparticles on the upper surface of a titanium oxide thin film and calcining the coated paste to form a porous film; adding an additive to a sensitizing dye solution to promote the adsorption of the dye; and dipping the porous film in the sensitizing dye solution to adsorb the sensitizing dye onto the surface of the porous film. The sensitizing dye solution is a dispersion of the sensitizing dye in an organic solvent. Also disclosed are a working electrode prepared using the sensitizing dye solution and a dye-sensitized solar cell including the working electrode. The addition of the additive shortens the time of dye adsorption. Despite the shortened adsorption time, the dye does not undergo desorption in the long term as well as in the short term, ensuring long-term stability of the solar cell.

Sensitizing dye solution, working electrode for dye-sensitized solar cell prepared using the sensitizing dye solution and dye-sensitized solar cell including the working electrode

Disclosed is a conjugated polymer for an organic solar cell. The proportion of units containing no alkyl thiophene moieties in the conjugated polymer can vary to make the conjugated polymer suitable for use as an electron-donating organic semiconductor material in a small-area or large-area organic solar cell. Therefore, the use of the conjugated polymer ensures high energy conversion efficiency of the organic solar cell.

Conjugated polymer for organic solar cell and organic solar cell including the same

Disclosed is an electron transport layer for a flexible perovskite solar cell. The electron transport layer includes transition metal-doped titanium dioxide particles. The titanium dioxide particles are densely packed in the electron transport layer. The electron transport layer is transparent. The use of the electron transport layer enables the fabrication of a flexible perovskite solar cell with high power conversion efficiency. Also disclosed is a flexible perovskite solar cell employing the electron transport layer.

Electron transport layer for flexible perovskite solar cell and flexible perovskite solar cell including the same

An organic solar cell is provided. The organic solar cell includes a photoactive layer in which a low molecular weight conjugated compound as a first organic semiconductor material is mixed with an appropriate amount of a second organic semiconductor material. The first organic semiconductor material includes both electron donors and electron acceptors. The presence of the electron donors and the electron acceptors in the first organic semiconductor material improves the morphology of the photoactive layer, leading to high efficiency of the organic solar cell.

Organic solar cell and method for fabricating the same

The present disclosure provides an organic semiconductor compound, which has superior charge mobility, low band gap, wide light absorption area and adequate molecular energy level. The conductive organic semiconductor compound of the present disclosure can be used as a material for various organic optoelectric devices such as an organic photodiode (OPD), an organic light-emitting diode (OLED), an organic thin-film transistor (OTFT), an organic solar cell, etc. In addition, it can be prepared into a thin film via a solution process, can be advantageously used to fabricate large-area devices and can reduce the cost of device fabrication.

Conductive organic semiconductor compound, method for preparing the same and organic thin-film transistor including the same

The present disclosure relates to a novel polymer compound and a method for preparing the same. More particularly, the present disclosure relates to a novel conductive low band gap electron donor polymer compound having high photon absorptivity and improved hole mobility, a method for preparing the same and an organic photovoltaic cell containing the same. Since the conductive polymer compound as a low band gap electron donor exhibits high photon absorptivity and superior hole mobility, it can be usefully used as a material for an organic optoelectronic device such as an organic photodiode (OPD), an organic thin-film transistor (OTFT), an organic light-emitting diode (OLED), an organic photovoltaic cell, etc. as well as in the development of a n-type material.

Low band gap polymer compound, synthesis of thereof, and organic photovoltaic cell containing the same

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Seoul, South Korea

Hae Jung Son