Perovskite films prepared with different conditions. a) 105°C in air b) 115°C in air, c) 125°C in air, d) 105°C in Nitrogen, e) 115°C in Nitrogen, and f) 125°C in Nitrogen.
4 Mar 2015 - 15:10
a) 105°C in air b) 115°C in air, c) 125°C in air, d) 105°C in Nitrogen, e) 115°C in Nitrogen, and f) 125°C in Nitrogen. Grain sizes on perovskite films are larger when prepared in air between 105 to...
Type: Photo
30 Jan 2015 - 15:56
The most popular next-generation solar cells under development may have a problem – the top layer is full of tiny pinholes, researchers at the Okinawa Institute of Science and Technology Graduate...
Type: News Article
Members of OIST Energy Materials and Surface Sciences Unit
28 Jan 2015 - 17:45
(From left) Dr. Luis Ono, OIST PhD student Zafer Hawash, Professor Yabing Qi and Dr. Michael Lee aim to improve the efficiency and lifetime of perovskite solar cells.
Type: Photo
Solar Cell Layers
28 Jan 2015 - 17:41
Most high-performance solar cells under development layer spiro-MeOTAD on top of perovskite, with other trace elements added to increase electrical conductivity. Pinholes in the top layer enable...
Type: Photo
Pinhole Channels
28 Jan 2015 - 17:37
A high magnification image shows a cross section of doped spiro-MeOTAD and the problematic pinholes (pictured on right) forming channels (pictured on left), which allow water and other molecules to...
Type: Photo
28 Jan 2015 - 17:33
Atomic Force Microscopy (AFM) images show pinholes in the spiro-MeOTAD when it is first prepared (top) and after air exposure for 24 hours (bottom). The average diameter of the pinholes is about 135...
Type: Photo
24 Sep 2014 - 16:25
One of the most common complaints about solar power is solar panels are still too expensive to be worth the investment. Many researchers have responded by making solar cells, the tile-like components...
Type: News Article
Perovskite Solar Cell
24 Sep 2014 - 16:19
Professor Qi suggests that his new, semi-transparent design for solar cells could allow windows to generate energy from the sun. 
Type: Photo
Qi Unit
24 Sep 2014 - 16:17
Professor Qi and members of his research unit developed a hybrid deposition method to produce perovskite solar cells.  From left: Yabing Qi, Sonia R. Raga, Shenghao Wang, Luis K. Ono, and Yuichi...
Type: Photo
7 Apr 2014 - 14:49
The research group that studies air exposure-induced gas molecule incorporation into Spiro-MeOTAD films.  From left: Katsuya Luis Ono, Yabing Qi, Gueorgui Nikiforov and Yuichi Kato.
Type: Photo
7 Apr 2014 - 14:45
Air exposure causes incorporation of gas molecules into the spiro-MeOTAD layer.
Type: Photo
27 Jan 2014 - 11:24
The dwindling resources for conventional energy sources make renewable energy an exciting and increasingly important avenue of research. However, even seemingly new and green forms of energy...
Type: News Article
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