Abstract: 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.

Abstract: 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.

Abstract: A metal organic chemical vapor deposition apparatus includes reaction chambers in which nitride layers is deposited on a substrate using a group III-V material, a buffer chamber connected to the reaction chambers and in which a transfer robot is disposed to transfer the substrate into the reaction chambers, a gas supply device configured to selectively supply one or more of hydrogen, nitrogen, and ammonia gases into the buffer chamber so that when the buffer chamber communicates with one of the reaction chambers, the buffer chamber has the same atmosphere as an atmosphere of the reaction chamber, and a heater disposed in the buffer chamber. Nitride layers are deposited on a substrate in the reaction chambers, and the temperature and gas atmosphere of the buffer chamber are adjusted such that when the substrate is transferred, epitaxial layers formed on the substrate can be stably maintained.

Abstract: The present invention relates to an Internet advertising method and system, which provide the advertisements of enterprises to a plurality of clients in an Internet environment in which the clients can access a server for providing online services through terminals capable of performing Internet communication, and exchange data with the server. The Internet advertising method using a Web page according to the present invention is performed between a Web server and a client terminal in the Internet.

Abstract: Methods and systems for conducting short-tem filmmaking events are disclosed, in which a set of rules is provided to a plurality of entities, each entity comprising an individual or a team of individuals. Some of the entities can be located in different cities, states or countries. Movies created by the entities in conformity with the rules are received over an electronic communications network in a specified period of time. The movies can be distributed or presented over the electronic network and/or screened at local venues. In some embodiments the system permits audience members to submit quality ratings for one or more of the presented films through the electronic communications network. In some embodiments an automated system is configured to permit users to electronically search a storage of the films by textual queries for film content, and the system is configured to electronically transmit matching or related films to such users.