| Autor: |
Paul Mulvaney, Darren J. Simpson, K. Tanno, Muthupandian Ashokkumar |
| Rok vydání: |
1998 |
| Předmět: |
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| Zdroj: |
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 141:143-151 |
| ISSN: |
0927-7757 |
| DOI: |
10.1016/s0927-7757(98)00233-7 |
| Popis: |
The room temperature electroluminescence properties of CdS powder (polycrystalline) electrodes have been investigated in aqueous solutions under various experimental conditions. Red emission is observed from all the CdS electrodes annealed at 400–600°C, whereas green emission, which has previously been observed only from single crystal CdS electrodes, is also observed from the powder electrodes annealed at 600°C. Both the red and the green emission intensities increase with an increase in the applied (negative) potential up to a critical value (−1.6 V vs Ag/AgCl); above this value there is a decrease in the intensity. The increase in the green emission is much stronger than the increase in the red emission at higher applied potentials. The effects of several electrolytes (Na 2 S 2 O 8 and NaOH) on the electroluminescent properties of CdS powder electrodes have also been studied. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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