CuCNS was deposited on conducting glass substrates by cathodic electrochemical technique using rotating disc electrode. CuCNS films exhibited transparency over 85% for visible light. High transparency of these films suggests capability of utilization as an optical window in photovoltaic cells. Cathodic photocurrent was observed on sensitized CuCNS electrodes when in contact with an electrolyte. An enhancement in photocurrent was observed under back wall mode than front wall mode illumination on photocathode.