Carbon Nanotube-Based Thin Film Creates Hybrid Organic/Silicon Solar Cells
Research into improving photovoltaics (PVs) is one of the most dynamic areas of nanotechnology. The range of nanomaterials and approaches to using them for increasing the energy conversion efficiency and lowering the cost of PVs are impressive.
Quantum dots have generated some of the more attractive approaches to creating solar cells with extremely high conversion efficiencies. Even the wonder material graphene has gotten into the act recently by offering an inexpensive alternative to indium-tin-oxide (ITO) used in the electrodes of organic solar cells.
But industry adoption of nanotechnology-based solar power solutions has been rocky, epitomized by last year's bankruptcy of Konarka. Often in emerging technologies—and perhaps in the case of nano-enabled PVs—it’s better not to reinvent the wheel but just figure out a way for it to roll a bit better.
To this end researchers at Yale University have developed a carbon nanotube-based thin film that, when applied to today’s crystalline silicon solar cells, create a hybrid carbon/silicon solar cells with far greater power-conversion efficiency than they currently possess.
“Our approach bridges the cost-effectiveness and excellent electrical and optical properties of novel nanomaterials with well-established, high efficiency silicon solar cell technologies,” said André D. Taylor, assistant professor of chemical and environmental engineering at Yale and a principal investigator of the research, in a university press release.