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Breakthrough made on
the synthesis of three layer CdSe/CdTe/ZnTe system
(Aug 31, 2005) |
| ¡¡Due to the
cascade type of energy levels for both valence
and conduction bands, the electron and hole are
located essentially on the CdSe and ZnTe, respectively.
Hence, they are separated by the CdTe layer, resulting
in an extraordinarily long radiative lifetime.
As for perspectives, this system can be exploited
in photovoltaic devices as well as in the catalytic
reaction. |
 |
Subpicosecond Kerr
gating system under construction (Aug 31, 2005) |
| ¡¡We are currently
setting up a subpicosecond Kerr gating system.
This, in combination with a charge coupled detector,
allows a spectral (even spatial) temporal evolution
with the whole range (400-700 nm). In comparison
to the upconverting technique, a much better signal-to-noise
ratio as well as stability by using the Kerr gating
method can be expected, although certain temporal
resolution may be lost. Our goal is to resolve
the spectral temporal evolution due to the vibrational
cooling effect. |
|
Ru(II) based OLED
under investigation (Aug 31, 2005) |
| ¡¡Through rational design of Ru(II) complexes, we would be able to achieve Ru(II) based OLED with decent external quantum efficiencies. Theoretical approaches also confirm the feasibility of achieving color tuning from green-NIR based on ingenious design of ancillary and bidentate ligands. We believe this progress may cast a quake on the OLED society. This work cannot be fulfilled without the collaboration with Prof. Chi¡¯s group in National Tsing Hua University. |
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