Light-Activated Amplification in Si-C Tandem Devices: A Capacitive Active Filter Model Vieira, Manuel A. ; Louro, Paula ; Vieira, Manuela ; Fantoni, Alessandro ; Steiger-Garcao, Adolfo Abstract Publication: IEEE Sensors Journal Pub Date: June 2012 DOI: 10.1109/JSEN.2011.2176537 Bibcode: 2012ISenJ..12.1755V