Kunststoffelektronik - Plastic electronics - Teil 05 - Light emitting diodes - Part 2 - Device optimization, Color tuning, Light output - Skript - Prof. Dr. rer. nat Uli Lemmer - Universitat Karlsruhe - 2003.pdf

文档介绍：I. Singlet vs. Triplet
II. Color tuning
III. Degradation phenomena
Efficiencies anic light emitting diodes
OLED principles: performance
Quelle: CDT (1999)
S1+S1 S0+S1
Haugender, . et al., PRB 1999
Singlet vs. Triplet exciton formation
- we need to form excitons from charge carriers
- if the statistics pletely random, three times more triplet excitons
than singlet excitons are formed
A typical device consists of 3 layers
S
+ + + + + + + +
+
+ +
- Tx
– Ty
––––––––
Tz
Are there equal cross sections for these processes ??
sS= sTx= sTy= sTz sS= sTx= sTy= sTz