1. Universidad Autónoma de Coahuila; C.P. 25000 Saltillo Coah. México
2. Centro de Investigaciones en Optica; A.P. 1-948, León Gto. 37160 México
3. NanoTech Institute; The University of Texas at Dallas; 800 West Campbell Road Richardson Texas 75080 USA
4. Solarno, Inc.; 153 Hollywood Drive Coppell Texas 75019 USA
5. Energy Efficiency Center; National University of Science and Technology, NUST, MISiS; Moscow 119049 Russia