EU PVSEC Programme Online
EU PVSEC 2021, 6 - 10 September 2021
Presentation: 5CV.2.48 Lifetime Degradation Studies of CdTe Solar Modules: Temperature, Irradiance, and Soiling Effects
Type: Visual
Date: Wednesday, 8th September 2021
13:30 - 15:00
Author(s): K. BENABDERAZAK, A. Elamri, H. El Gallassi, K. Tijani, I. Ait Abdelmoula, O. Lakbita, Z. Naimi, D. Barrit, O. Moudam
Presenter / Speaker: K. BENABDERAZAK, Mohammed VI Polytechnic University, Benguerir, Morocco
Event: Conference Conference
Session: 5CV.2 Operation, Performance and Maintenance of PV Systems
Topic: 5. 3 Operation, Performance and Maintenance of PV Systems
Summary / Abstract: Cadmium telluride solar cells have reached a high efficiency of 19% for modules1 indicating a very promising future in terms of commercialization and providing an alternative to indirect band gap silicon based solar cells. However, similar to other solar cells, CdTe-based solar modules exhibit several stability issues as a result of varying chemical and physical parameters that lead to a consequential degradation problem.2 This presentation aims to discuss the results of lifetime studies in CdTe-based photovoltaic modules and several techniques used to measure indoor and outdoor lifetime including temperature, irradiance experiments with current-voltage, maximum power tracking, and soiling effect measurements (Figure 1). In essence, CdTe modules demonstrated a degradation of 40% after three years of operation under different weather conditions. The effect of soiling conditions on the lifetime of CdTe solar cells is also discussed. Deep elemental analysis with the help of LIPS and SEM-EDX have been conducted on modules to analyse active layer material composition to check the mechanism behind the degradation effect after the end of the lifetime studies. Additional work is ongoing to enhance the efficiency of the CdTe modules by adding luminescent down-shifting materials to improve the visible spectra.