Degradation and device physics modeling of SWCNT/CdTe thin film photovoltaics

作者：Houshmand Mohammad; Zandi M Hossein; Gorji Nima E^*

来源：Superlattices and Microstructures, 2015, 88: 365-370.

DOI：10.1016/j.spmi.2015.09.023

• Nanotube
• CdTe
• Thin film
• Solar cell
• Degradation

We propose single walled carbon nanotubes as the n-type window partner of CdTe layer in a conventional CdS/CdTe thin film solar cells. The semiconductor nanotubes have superior optical and electrical properties i.e. controllable high band gap, being highly conductive and non-diffusive (not mobile). We modeled current-voltage characteristics of hybrid SWCNT/CdTe structure using Sah-Noyce-Shockley theory instead of Schottky barrier theory. The former theory is rather strong since it is based on carrier transport in the depletion region of a pn junction and considers the defect density within the depletion width. Also, a time dependent approach is used to simulate the degradation of device metrics under bias, illumination and temperature. It is discussed how a nanolayer can reduce the degradation rate of a thin film solar cell by surpassing grain boundaries and mobile ions migration towards junction.

• 出版日期2015-12