Download laceyer9/11/2023 ![]() Encouragingly, a judicial choice of the electron-blocking layer's energy levels could suppress this degradation path.Download a PDF of the paper titled Equivariant vs. If the I 2 is allowed to leave the device, this constitutes a slow (1000s of hours), but non-reversible degradation pathway. We also find that under light excitation, there is a generation of iodine molecules (I 2). ![]() Introducing reactive electrodes that react with and immobilise the iodide results in a rapid loss of performance on the time scale of an hour, which is only slightly accelerated under illumination. If all the reactions are reversible and there is no loss of iodine, their main effect is the introduction of mobile recombination centres. By comparing stress under dark and one sun excitation conditions, we find that the photoexcited charges enable the redistribution of iodide, which in the case of permeable blocking layers results in the deterioration of the power conversion efficiency and the appearance of hysteresis. For both cases, we examine the impact of incorporating iodide reactions. ![]() We stress the device at a bias of 0.9 V, close to the maximum power point, and compare blocking layers impermeable to ions and those that allow ionic transport. We study recombination pathways in halide perovskite solar cells using a semiconductor device model that includes iodide diffusion and iodide reactions.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |