LAP Lambert Academic Publishing ( 12.11.2010 )
€ 49,00
This book describes Opto-electronic properties of three new carbazole based co-polymers that can be implemented as host in phosphorescence polymer light-emitting diode. We present absorption, steady-state emission and time resolved emission spectroscopy of carbazole based conjugated polymers. The decay kinetics of triplet emission of the co-polymers was observed after optical excitation. Several findings such as optical band-gap, singlet to singlet transition energies, triplet to triplet transition energies, exchange energies (∆EST), Stoke''s shift have been presented. The onset of absorption is at 3.10-3.25 eV for P1, P2 and P3 polymers respectively. One emission band originating from singlet excited state is observed at RT. The gaps between singlet and triplet excited states are 0.44-0.47 eV. From decay kinetics the triplet excited state life-times were found to be several orders of ms at 10-13 K that reduces to less than 3 ms at room temperature. At room temperature delayed fluorescence has been observed for all three polymers. An energy band diagram including lower lying excited states has been constructed and compared.
Детали книги: |
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ISBN-13: |
978-3-8433-7420-0 |
ISBN-10: |
3843374201 |
EAN: |
9783843374200 |
Язык книги: |
English |
By (author) : |
Ripon Dey |
Количество страниц: |
108 |
Опубликовано: |
12.11.2010 |
Категория: |
Органическая химия |