AFANAS'EV V P ET AL: 'Photodetector structures based on amorphous hydrogenated silicon with nanocrystalline inclusions', OPTIKO-MEKHANICHESKAYA PROMYSHLENNOST, DEC. 2001, OPT. SOC. AMERICA, RUSSIA, vol. 68, no. 12, pages 101 - 104, XP008017344, ISSN: 0030-4042