Performance evaluation of semi-transparent CdTe thin film PV window applying on commercial buildings in Hong Kong

The energy performances of c-Si PV windows and a-Si PV windows have been investigated comprehensively worldwide. However, CdTe thin film PV windows which are supposed to achieve better performance due to its higher efficiency are rarely studied. This study evaluated the energy performance of semi-transparent CdTe thin film PV window applying on commercial buildings. The results show that CdTe PV windows have large energy saving potential in Hong Kong, and the annual energy generation of per unit CdTe PV windows is 52.3kWh/m2. Compared to the common window and a-Si PV window, the saving in net energy consumption is 19.6% and 15.3%, respectively.