Yet another new “breakthrough” was made in the field of pervoskite
solar cells — with a conversion efficiency of 15% in a cell greater than
1 cm square in size being certified by the Calibration, Standards and
Measurement Team at the Research Center for Photovoltaics, National
Institute of Advanced Industrial Science and Technology.
The new pervoskite solar cell was created by researchers at the
Photovoltaic Materials Unit at the National Institute for Materials
Science (NIMS, Sukekatsu Ushioda, president) — led by Dr Liyuan Han.
As most high conversion efficiencies achieved to date using perovskite solar cells
have been via small-sized cells (about 0.1 cm2) not suited for actual
use, the new certified record represents one more step towards potential
widespread commercial use of the technology. (The current record for
small cells is 20.1% conversion efficiency — the measurement error range
was large for that, though, due to the size of the cell used, 0.0955
cm2.)
The new cells were given the high conversion efficiency via the
control of the morphology of the pervoskite layer via the use of a new
fabrication method.
A recent press release provides more:
Here, we developed a new charge
transport material which shows hydrophobicity and high carrier mobility,
and successfully improved the stability of perovskite solar cells with
this new material. Based on these results, we expanded the solar cell to
more than 1 cm square and improved the method to create the device. As a
result, we achieved 15% conversion efficiency in perovskite solar cells
for the first time in the world certified by the international public
test center (Calibration, Standards and Measurement Team at the Research
Center for Photovoltaics, National Institute of Advanced Industrial
Science and Technology).
On the basis of these outcomes, we
aim to further improve conversion efficiency by developing new carrier
transport materials with even higher performance and controlling
interfaces in perovskite solar cells.
Good news for perovskites fans… Closer by the day… We’ve been covering the technology feverishly lately. For more, see:
Image Credit: AIST
http://cleantechnica.com/2015/07/08/perovskite-solar-cell-record-first-certified-conversion-efficiency-15-cell-greater-1-cm-square/