Occupational Health and Safety(OHS) in Small and Medium Size Enterprises (SMEs): A Primary Review1 SANTE ET SECURITE

Problems of occupational health and safety(OHS) in small and medium size enterprises(SMEs) in that mainly are private enterprises, are severe in China where as, the corresponding theoretical study are lagged behind regretfully. This paper summarizes the representative progress in this discipline simply. The exploratory results will be used to make an initial evaluation of SMEs needs, and will help orient future research. Key words: Occupational health and safety, Small and Medium Size Enterprises, review Résumé: Les problèmes de Santé et sécurité professionnelles(OHS) dans les petites et moyennes entreprises(PME) sont principalement ceux dans les entreprises privées et sont graves partout en Chine. La recherche théorique correspondante est largement et malheureusement arriérée. Cette thèse fait un résumé sur le progrès représentatif dans cette seule discipline. Les résultats exploratoires seront utilisés pour faire une évaluation initiale des demandes des PMEs et nous aideront l’orientation des recherches futures. Mots-clés: Santé et sécurité professionnelles, les petites et moyennes entreprises, revu

Solution-processed small-molecule solar cells: breaking the 10% power conversion efficiency.

A two-dimensional conjugated small molecule (SMPV1) was designed and synthesized for high performance solution-processed organic solar cells. This study explores the photovoltaic properties of this molecule as a donor, with a fullerene derivative as an acceptor, using solution processing in single junction and double junction tandem solar cells. The single junction solar cells based on SMPV1 exhibited a certified power conversion efficiency of 8.02% under AM 1.5 G irradiation (100 mW cm(-2)). A homo-tandem solar cell based on SMPV1 was constructed with a novel interlayer (or tunnel junction) consisting of bilayer conjugated polyelectrolyte, demonstrating an unprecedented PCE of 10.1%. These results strongly suggest solution-processed small molecular materials are excellent candidates for organic solar cells