| About this Abstract |
| Meeting |
Materials Science & Technology 2012
|
| Symposium
|
Solution-Based Processing for Ceramic Materials
|
| Presentation Title |
Semiconductor Nanocrystals with
Surface Passivation and Surface Plasmon for
Luminescence and Solar-Cell Applications |
| Author(s) |
Byungwoo Park, Jongmin Kim, Changwoo Nahm, Hongsik Choi, Seunghoon Nam, Chohui Kim |
| On-Site Speaker (Planned) |
Byungwoo Park |
| Abstract Scope |
Semiconductor nanocrystals are widely studied for luminescence and solar-cell applications. However, the surface states in nanoparticles induce nonradiative recombination of charge carriers. Therefore, the surface modification of nanophosphors is effective for the optimized luminescence efficiency. Similar ideas are utilized in solar cells to prevent charge recombination at the interface between transparent-conducting oxide and electrolyte, or between semiconductor-nanocrystal electrode and electrolyte. Nanoscale coating is investigated in dye- and quantum-dot- sensitized solar cells to prevent the charge recombination, thereby optimizing the power-conversion efficiency.In addition, surface-plasmon induced modification of radiative/nonradiative recombination rates are applied for boosting the optical properties of semiconductors, leading to an effective energy transfer between the metal surface and the luminescent nanoparticles. Similar ideas are again applied to solar cells utilizing the localized surface-plasmon resonance in order to absorb as many photons as possible to produce more carrier electrons. The involved mechanisms will be discussed in this talk. |
| Proceedings Inclusion? |
Undecided |