Generation and drift of photocarriers in a conjugated ladder polymer
| Autor: | Martin A. Abkowitz, Milan Stolka, Samson A. Jenekhe, John A. Osaheni, Homer Antoniadis |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Photocurrent
Range (particle radiation) Materials science business.industry Mechanical Engineering Photoconductivity Metals and Alloys Analytical chemistry Trapping Conjugated system Condensed Matter Physics Electronic Optical and Magnetic Materials Mechanics of Materials Electric field Materials Chemistry Optoelectronics Monochromatic color Thin film business |
| Zdroj: | Synthetic Metals. 60:149-157 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/0379-6779(93)91235-t |
| Popis: | Generation and drift of photocarriers in thin films of the conjugated ladder polymer, poly(benzimidazobenzophenanthroline) (BBL), are explored by using transient photoconductivity methods. An estimation of a lower limit for photogeneration efficiency of mobile holes is found to be close to 10 −2 at an electric field of 5×10 5 V/cm. The drift of photogenerated carriers is found to be severely range limited by trapping events. In addition persistent decay of photocurrent is detected following the termination of a steadystate monochromatic illumination. The form of the persistent photocurrent suggests a broad range of release times of the trapped carriers which can be attributed to a disorder-induceddistribution of trapping sites. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|