We have investigated the spectral responsivity of porous silicon Schottky barrier photodetectors in the wavelength range 0.4–1.7 <i>μ</i>m . The photodetectors show strong photoresponsivity in both the visible and the infrared bands, especially at 1.55 <i>μ</i>m . The photocurrent can reach 1.8 mA at a reverse bias of 6 V under illumination by a 1.55-<i>μ</i>m , 10-mW laser diode. The corresponding quantum efficiency is 14.4%.
© 2001 Optical Society of America
Ming-Kwei Lee, Chi-Hsing Chu, Yu-Hsiung Wang, and S. M. Sze, "1.55-μm and infrared-band photoresponsivity of a Schottky barrier porous silicon photodetector," Opt. Lett. 26, 160-162 (2001)