Enhanced photocurrent ZnO/CdS/CuInSe2 solar cells

✍ Scribed by R.R. Potter

• Publisher: Elsevier Science
• Year: 1986
• Weight: 363 KB
• Volume: 16
• Category: Article
• ISSN: 0379-6787
• DOI: 10.1016/0379-6787(86)90107-9

✦ Synopsis

The short-wavelength spectral response of a thin film CuInSe2 device is improved by a thin (~ 500 A) undoped CdS layer and a 1 pm ZnO conducting window layer. The ZnO acts as an antireflection coating and permits photons of wavelength above 360 nm to be absorbed in the CuInSe2. A 25% photocurrent enhancement is measured for comparable devices. Total area efficiencies over 9% are achieved under AM 1.5 illumination. Current-voltage, capacitance-voltage and spectral response data are discussed and indicate that device properties are similar to devices with (In)CdS window layers. A reverse bias breakdown with long time constants is observed. Deep states in the thin CdS layer may be responsible.