Applied Physics

Organic Crystals Shine in Solar Cells

See allHide authors and affiliations

Science  03 Nov 2000:
Vol. 290, Issue 5493, pp. 901
DOI: 10.1126/science.290.5493.901a

Organic materials are attractive candidates for low-cost electronics—they are lightweight and can be deposited on flexible and low-cost substrates, and in favorable cases they can be doped and can act as photoconductors. However, for applications in solar power generation, the performance to date of organic-based photovoltaics has attained conversion efficiencies in the range of only 2 to 3%. Exploiting their recent advances in the preparation of high-quality organic single crystals, Schön et al. now report that organic materials, in this case bromine-doped pentacene, may be leading candidates for inexpensive yet efficient solar cells. The addition of bromine to the organic crystal switches the high field region, the region most essential for photoinduced carrier separation, to the side with the highest photon density, and results in a conversion efficiency of 4.5%. Further optimization of their simple structures should result in still better performance. — ISO

Appl. Phys. Lett. 77, 2473 (2000).

Navigate This Article