This is definitely something that has been
an area of active research. One example of
this is to use multi-junction solar cells
in which multiple material layers are used to
capture different parts of the electromagnetic
The field of solar cell research is a huge
area. Improving solar panel efficiency is a
materials challenge, an engineering challenge, and
a device challenge.
Currently, an exciting area of research is in
the materials system known as halide
perovskites. Halide perovskites have generated
a lot of attention because of their simple growth
process and ability to achieve sizeable
efficiencies with little optimization.
A big challenge with this materials system is
that they degrade quickly with time and often
contain highly toxic elements.
Exploration of materials systems (both organic
and inorganic) is a huge area in solar cell
research, but is only the beginning of the story.
For it to be a marketable product, it needs to be
integrated into a device and easily maintained,
both areas for which study is ripe.
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