According to the American physicist
organizational networks reported recently, the U.S. Department of Energy's
Brookhaven National Laboratory and Los Alamos National Laboratory scientists
have developed a light can be absorbed and converted into electrical energy a
large area of the new transparent film . This film of the semiconductor and the
fullerene material , a micro honeycomb structure . Research published in the latest
issue of the " Materials Chemistry " magazine , the paper said the
technology could be used to develop transparent how to make solar panels can even be made of this material power windows.
This material is composed of a semiconductor doped carbon fullerene
polymer. Under carefully controlled conditions, the material can be self-
assembly method consists of a hexagonal structure micron scale expanded to a
size of several millimeters of the honeycomb structure covered with micro
plane.
Responsible for the study of the U.S. Brookhaven National Laboratory
Center for Nanoscale Materials versatile physical chemist Mircea Cartwright
said that although this honeycomb films produced using conventional polymer
materials ( such as polystyrene ) similar process , but for the semiconductor
and fullerene material and allow it to absorb the light generated charges is
the first time .
According to reports, the reason why the material can also be
transparent in appearance only because the polymer chains are closely linked
with the edges of the hexagon , and the remaining part of the structure is
relatively simple to connect the center point outward thinner . This structure
has a connection function , but also has a strong ability to absorb light , but
also conducive to conducting current , while other parts are relatively thin
and more transparent, and mainly from the light effect.
Researchers a very unique way to weave this honeycomb film : First
comprising a polymer and fullerene was added , including the micro-scale thin
layer of small water droplets. These droplets to the polymer solution after the
contact will self-assemble into a large array , and when the solvent was
completely evaporated , it will form a large area of the hexagon honeycomb
plane. Furthermore , the researchers found the formation of polymers and is
closely related to the evaporation rate of the solvent , which corresponds to
the charge of the final material will determine the transmission speed . The
slower the solvent evaporates , the polymer structure more compact , faster the
charge transfer .
"This is a significant cost and effective method of preparing a lot
of potential applications from the laboratory to large-scale commercial
production being ." Cartwright said.
By scanning electron microscopy and fluorescence probe confocal scanning
microscope of new materials researchers confirmed the homogeneity of the
honeycomb structure , and its different parts (edge , center node ) of the optical properties and a charge generating
tests carried out .
Cartwright said: "We work so that people on the optical
characteristics of the honeycomb structure of a deeper understanding . Next we
plan to apply this material is transparent and rollable flexible solar cell and other equipment manufacturing them , in order to promote this kind of
cellular membrane into the practical stage as soon as possible . "
没有评论:
发表评论