Ohio Supercomputer Center empowers development of new solar energy material

By Pam Frost Gorder



Using the high performance computing systems available at the Ohio Supercomputer Center, the chemists explored different molecular configurations to design the hybrid material. Then, with colleagues at National Taiwan University, they synthesized molecules of the new material in a liquid solution, measured the frequencies of light the molecules absorbed, and also measured the length of time that excited electrons remained free in the molecules.

"There are other such hybrids out there, but the advantage of our material is that we can cover the entire range of the solar spectrum," explained Malcolm Chisholm, distinguished university professor and chair of the department of chemistry at Ohio State.

Today's solar cell materials can only capture a small range of frequencies, so they can only capture a small fraction of the energy contained in sunlight. The material generates electricity just like other solar cell materials do: light energizes the atoms of the material, and some of the electrons in those atoms are knocked loose.


In the new hybrid material, electrons remain free much longer than ever before. The chemists found that it emits electrons in two different energy states -- one called a singlet state, and the other a triplet state. Both energy states are useful for solar cell applications, and the triplet state lasts much longer than the singlet state.





The project was funded by the National Science Foundation and Ohio State's Institute for Materials Research. The study appears in the current issue of the Proceedings of the National Academy of Sciences (PNAS).

Editors note: This story is revised from a release written by Pam Frost Gorder. For the full, original OSU Research Communications story, click here.