摘要:

Measurements of global solar radiation on a horizontal surface and duration of sunshine are presented. The abundance of solar energy in Doha (Latitude 25°18'N, Longitude 51°33'E) is evident from these data. A correlation between G(G0 and the fraction of maximum possible number of bright sunshine hours are determined for Doha and compared with the correlation for Yemen show a good agreement.

ISSN:0142-5919    

DOI:10.1080/01425918708914406

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

The effects of ethane plasma annealing on grain boundary barrier heights, minority carrier lifetimes and capture cross-sections and trap energy levels have been observed through measurements of photoconductance voltage and decay time onp-type Wacker polycrystalline silicon samples, of mm grain-size. It has been found that ethane plasma annealing significantly reduces the grain boundary heights, increases the minority carrier lifetimes and reduces minority carrier capture cross-sections by filling the deep trap levels in the band gap. It is suggested that ethane and other saturated hydrocarbons may prove useful for passivation of grain boundaries in polycrystalline solar cells and other electronic devices.

ISSN:0142-5919    

DOI:10.1080/01425918708914407

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

ISSN:0142-5919    

DOI:10.1080/01425918708914408

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

L'analyse du marché du pétrole montre qu'il est fragile et orienté à la hausse au fur et a mesure du ressèrement de l'offre autour de quelques pays disposant des principales réserves.

ISSN:0142-5919    

DOI:10.1080/01425918708914409

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor