✦ LIBER ✦
Direct determination of electron-hole trap depth from delayed luminescence of poly-(N-vinylcarbazole)
✍ Scribed by Xiaoping Guo; G.David Mendenhall
- Book ID
- 103024243
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 410 KB
- Volume
- 152
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
Charge-recombination
luminescence from 27 cm2 films of poly-(N-vinylcarbazole) (PVK), aloneor doped with 2,4,7-trinitrofluorenone, was greatly reduced when the temperature was suddenly changed from 294 to 273 K during the decay. The instanta- neous drop in luminescence corresponded to mean activation energies of 0.4-0.6 eV, in excellent agreement with previous indirect estimates of the energies of deep traps in PVK. The "missing" luminescence from the cooled films could be recovered as excess thermoluminescence on warming to 353 K.