http://repositorio2.unb.br/jspui/handle/10482/6157| File | Description | Size | Format | |
|---|---|---|---|---|
| ARTIGO_AmbipolarCarrierDiffusion.pdf | 119,02 kB | Adobe PDF | View/Open |
| Title: | Ambipolar carrier diffusion in In0:53Ga0:47As single quantum wells |
| Authors: | Monte, Adamo Ferreira Gomes do Silva, Sebastião William da Cruz, Júnio Márcio Rosa Morais, Paulo César de Cox, H. M. |
| Assunto:: | Física |
| Issue Date: | Dec-1999 |
| Citation: | MONTE, A.F.G. et al. Ambipolar carrier diffusion in In0:53Ga0:47As single quantum wells. Brazilian Journal of Physics, v. 29, n. 4, p. 690-693, dez. 1999. Disponível em: <http://www.scielo.br/pdf/bjp/v29n4/v29n4a13.pdf>. Acesso em: 9 dez. 2010. doi: 10.1590/S0103-97331999000400014. |
| Abstract: | The microluminescence surface scan technique (MSST) has been used to investigate photocarrier diffusion in undoped In0:53Ga0:47As - InP single quantum well (QW), in the temperature (T) range from 15 K to 295 K. Narrowing of the photoluminescence (PL) spatial profile is observed as the temperature is lowered, indicating reduction of the photocarrier diffusion length upon cooling. It was found that the width of the PL spatial profile follows a linear function of temperature, but a change in slope by a factor of 2.6 is observed at about 200 K, indicating a change of the dominant carrier scattering mechanism. In the temperature range of 15 K to 200 K, the ambipolar photocarrier diffusion mechanism seems to be correlated to impurity states thermally activated. |
| Appears in Collections: | Artigos publicados em periódicos e afins |
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