Improvement of operation lifetime for conjugated polymer:fullerene organic solar cells by introducing a UV absorbing film

Wavelength influence on the photodegradation of P3HT:PCBM organic solar cells

“…While UV degradation can be easily avoided using adequate filters without noticeable decreasing in the main cell parameters [20,43], avoiding degradation caused by blue wavelengths poses a greater challenge. Meanwhile, different approaches like development of NIR photovoltaics can be seen as a promising way to overcome this problem [44][45][46].…”

Photon recycling across a ultraviolet-blocking layer by luminescence in polymer solar cells

“…Figure 1 substrate with UV-blocking layer is drastically reduced compared to the reference substrate. Since UV-radiation was identified as a source of degradation of organic solar cells, the introduction of an UV-blocking layer should result in an increased life-time of the photovoltaic device, which was suggested by Jïrgensen 3 and recently shown by Ryu et al 10 The drawback of the UV-filter is that the current output of the solar cell, and thus the efficiency, gets reduced, as the additional absorption of the UV-blocking layer limits charge generation in the photoactive layer. However, a better spectrally adapted UV-blocking layer will reduce these losses.…”

Stability of Bulk Heterojunction Organic Solar Cells with Different Blend Ratios of P3HT:PCBM

“…Generally, P3HT shows poor environmental stability compared to PCBM for oxygen, moisture, UV light and so on. Reference [25], seeking to understand light stability for the single layer P3HT, made an OPV device having a single layer P3HT, and measured the degree of degradation of cell parameters under illumination. The J SC decreases significantly with exposure time.…”

“…The generated defects shift the Fermi level to the midgap, leading to an increase in its resistivity. Note that the polymer used in the cell, P3HT, can degrade in the thin film structure containing the molecular oxygen when it is irradiated with UV or visible light [25,26].…”