有機光電半導體材料及其未來之應用.ppt

有機光電半導體材料及其未來之應用
Institute of Electro-Optical Science and Engineering,
National Cheng Kung University, Tainan, Taiwan 701
成功大學光電科學與工程研究所
01/16/2007
郭宗枋助理教授
T.-F. Guo
1
NCKU Institite of Electro-Optical Science & Engineering
Outlines
Semiconductors
Organic semiconductors (energy and delocalization of charge carriers)
OLEDs and PLEDs annic photovoltaic and solar cells
Conclusions
T.-F. Guo
2
NCKU Institite of Electro-Optical Science & Engineering
Fundamental science of anic semiconductors
T.-F. Guo
3
NCKU Institite of Electro-Optical Science & Engineering
Typical Semiconducting Materials
T.-F. Guo
4
NCKU Institite of Electro-Optical Science & Engineering
Energy Band Diagram of a conductor, semiconductor, and insulator
(a) a conductor
(b) a semiconductor
(c) an insulator
T.-F. Guo
5
NCKU Institite of Electro-Optical Science & Engineering
Beginning naic semiconductor (π bonding)
Side-by-Side Bonding
T.-F. Guo
6
NCKU Institite of Electro-Optical Science & Engineering
Conjugated (共軛): alternatively double-single bonds
CH
CH
CH
CH
CH
CH
雙鍵
單鍵
T.-F. Guo
7
NCKU Institite of Electro-Optical Science & Engineering
Bang Gap of Polyacetylene
………..
……
Band Gap
T.-F. Guo
8
NCKU Institite of Electro-Optical Science & Engineering
Conjugated polymer
Sigma bond
Delocalized  electron cloud
Alternating single-double bonds
T.-F. Guo
9
NCKU Institite of Electro-Optical Science & Engineering
Creating new materials from old materials
n
Eg = eV
PPV
O
R
1
n
O
Eg = eV
R
2
R
1
n
Eg = eV
R
2
n
Eg = eV
PPP
n
Eg = eV
PA
Through the structure engineering, polymers with different emitting colors were synthesized.
T.-F. Guo
10
NCKU Institite of Electro-Optical Science & Engineering