While all research in traditional photovoltaics faces the same underlying theoretical limitations, MIT PhD student David Bierman says, â€œwith solar thermal photovoltaics you have the possibility to exceed that.â€ In fact, theory predicts that in principle this method could more than double the theoretical limit of efficiency, potentially making it possible to deliver twice as much power from a given area of panels.Photo courtesy of MIT.
Stanford scientists improve perovskite solar-cell absorbers by giving them a squeezeTop: A normal perovskite crystal (left) bends and twists after being squeezed between two diamonds. Bottom: The orange perovskite crystal changes colour as pressure is applied, indicating that different wavelengths of light are being absorbed. (Image credit: Adam Jaffe and Yu Lin)
Three types of large-area solar cells made out of two-dimensional perovskites. At left, a room-temperature cast film; upper middle is a sample with the problematic band gap, and at right is the hot-cast sample with the best energy performance. Image courtesy Los Alamos National Laboratory.
Oak Ridge National Laboratory scientists combined imaging techniques to measure crystallization kinetics of perovskite films following exposure to a mixed halide vapor. Over time, extra halide reactants settle in the film's grain boundaries, demonstrating atomic competition in crystal growth.
CIGSe modules in standard industrial formats have not yet attained the record efficiency demonstrated at laboratory scale. One possible cause: defects that reduce the efficiency level can form during the course of fabrication.
The Goal: Make solar cells cheaper by eliminating silver and lead from manufacturingVanessa L. Pool, a postdoctoral researcher at SLACâ€™s Stanford Synchrotron Radiation Lightsource, with an instrument used to observe how a solar cellâ€™s silver contacts form during high-temperature manufacturing. (SLAC National Accelerator Laboratory)
Illustration of the initial charge transfer step in a dye sensitized solar cell. A photon from the sun is absorbed and excites the dye molecule. Subsequently, an electron can is injected into the ZnO-Layer where it can be trapped by so called interface-states. Credit: Mario Borgwardt/HZB
Photochemical cell: Light creates free charge carriers, oxygen (blue) is pumped through a membraneA photo-electrochemical cell has been developed at TU Wien (Vienna). It can chemically store the energy of ultraviolet light even at high temperatures.
On Mapdwellâ€™s satellite-map website, people can click on an individual roof to receive information about installation price, energy and financial savings, and environmental impact. Image courtesy of Mapdwell (edited by MIT News)