Currently, the cost of commercial silicon solar cell power generation is 10 times higher than that of utility power generation. In order to reduce the cost of solar cell power generation, people have turned to organic molecular materials. According to a report by the American Physicists Organization Network on September 12, researchers at Harvard University, Haverford College in Pennsylvania and the National Autonomous University of Mexico launched a new program called the Harvard Clean Energy Program (CEP), which aims to find ways to The organic materials of equipment efficiency will increase the current energy efficiency level of solar cells from 9.2% to 10% to 15%, and extend the service life by 10 years. If these two standards are met, the cost is lower than other current power supplies. In the recently published "Journal of Physical Chemistry Communications", some preliminary results were announced, and more research is still to be done.

Organic solar materials are not only cheaper than non-organic materials, but also harmless, lightweight and easy to process, can be made translucent and pressed into various shapes. But to screen one by one from millions of organic molecules to search for materials with excellent photoelectric properties is like a needle in a haystack.

The research team developed a large-scale automated molecular screening method. This method combines traditional modeling methods and modern drug development strategies, and also uses machine learning, pattern recognition, and cheminformatics techniques. In addition, the program also uses volunteer computers provided by the IBM World Public Grid (WCG) to download free non-toxic programs from the IBM website and use them to screen material molecules when their computers are idle.

"A new molecule can be added to the database about every 12 hours, accelerating the development of new materials." Alan Esperu-Guzke, one of the project leaders, said that Harvard Clean Energy Program can find thousands Molecules, there are currently 10 million molecular patterns in the database that can be used as candidates. "After working with Stanford University to conduct a theoretical demonstration, we selected eight transparent compound variants that can be used as organic semiconductors. WCG will help us find more useful information."

The screening analysis uses a hierarchical calculation technique. Each step lists the graphics and properties of all candidate molecules for the next screening. According to preliminary analysis, only 0.3% (3000 to 5000) of all molecules can be satisfied at the energy level that can meet the 10% or higher efficiency requirements of organic solar cells.

Another project leader of Harvard University, Johannes Hetchman, said that on the one hand, this collection provides a convenient way to quickly match molecular properties, electrical structures and related compounds, not only for the photoelectric equipment materials. Development can also be used for many other purposes; on the other hand, it also lays a solid foundation for grasping the structure and property relationship of molecules.

The researchers also said that as more results are achieved in the future, they will soon build a reference database to provide valuable data for searching for the best optoelectronic equipment materials and developing organic electronic equipment. The database will be opened in 2012, hoping to accelerate the development of clean power energy and promote it to reach the level of traditional energy as soon as possible.

Conference Table

A conference table is a large table specifically designed for meetings, discussions, and collaborative work in conference rooms or boardrooms. When looking for a conference table, consider the following factors:

1. Size and Shape: Determine the size of the conference table based on the available space in your conference room or boardroom. Consider the number of people you want to accommodate comfortably. Common shapes include rectangular, oval, round, or boat-shaped tables. Choose a shape that suits the layout of the room and promotes effective communication.

2. Material and Finish: Conference tables come in various materials, including wood, glass, metal, or a combination of materials. Consider the durability, aesthetics, and maintenance requirements of the chosen material. Additionally, evaluate the finish options available to ensure it matches the overall decor of the room.

3. Style and Design: Choose a conference table that aligns with the style and design of your office or conference room. Options range from traditional and classic designs to modern and contemporary styles. Consider the aesthetics, detailing, and overall look of the table to create a cohesive and professional atmosphere.

4. Features and Functionality: Evaluate any additional features or functionality that you may require. This could include integrated power outlets or data ports for easy connectivity, cable management systems to keep wires organized, or built-in storage options for holding meeting supplies or equipment.

5. Seating Capacity: Consider the number of seats you need around the conference table. This will depend on the size of your team or the expected number of participants in meetings. Ensure that the table provides enough space for everyone to sit comfortably without feeling crowded.

6. Ergonomics: Assess the ergonomics of the conference table. Look for features like a comfortable height and adequate legroom to promote good posture and comfortable seating during long meetings. A table with adjustable height options may be beneficial for accommodating different user preferences.

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