Research

1. Polymer based optoelecronic devices.

Ÿ Polymer solar cells

Ÿ Polymer LEDs

Ÿ Polymer based Dim-light device

Ÿ Interface engineering with Ionic liquid, and conjugated polyelectrolyte

2. Synthesis of quantum dots, perovskite and metal nanoparticle.

Ÿ Synthesis of quantum dots (PbS, PbSe, CdS, CdSe, etc) using colloidal method.

Ÿ Synthesis of quantum dots by using microfluidic method.

Ÿ Synthesis of Perovskite Materials (ABX₃) and perovskite QD

Ÿ Synthesis of solution-processable metal oxide TiO₂, ZnO, SnO₂ etc.

Ÿ Characteristics and analysis of synthesized QD and metal nanoparticle.

3. Organic semiconductor-based optoelectronic devices (solar cells, light-emitting diodes, field effect transistor).

Ÿ Development of new device architecture for improving device performance.

Ÿ Fabrication of conventional- and inverted-type organic optoelectronic devices.

Ÿ Characteristic of conductive polymer (PEDOT:PSS) for using buffer layer and electrode.

Ÿ Device optimization of polymer solar cells using various treatments (thermal-, solvent-annealing, additives, etc).

Ÿ Enhancement of the devices (solar cells, light-emitting diodes) performance by using dipole moment (conjugated polymer, ionic liquid, self-assembly mono layer).

Ÿ Introduction of metal nanocomposites (surface plasma resonance from Ag, Au metal composite) into organic optoelectronic devices for performance improvement by additional light absorption and scattering effect.

4. Quantum dot optoelectronic device.

Ÿ Fabrication of Quantum dot schottky, heterojunction solar cells.

Ÿ Inverted quantum dot solar cells by using low temperature ZnO layer.

Ÿ Fabrication of hybrid quantum dot –organic (PCBM) solar cells.

Ÿ Enhancing performance of quantum dot by inserting ionic liquid moleculse.

Ÿ Design of new high performance hybrid quantum-organic (BHJ) solar cells.

Ÿ SAMs for high performance of QDSCs (10.7%, record PCE, 2015.12)

5. Perovskite optoelectronic device.

Ÿ Fabrication of perovskite solar cells.

Ÿ Fabrication of p-i-n and n-i-p structure.

Ÿ Fabrication of perovskite LED based on film and QD form

Ÿ Non-toxic perovskite synthesis for PV and LEDs

Ÿ Perovskite solar cells PCEs > 24% (certified 23.5% at Newport 2019.06)

Ÿ Perovskite Q.D LEDs RGB