Degradation phenomena in DSCs exact figure mentioned in the literature, but usually the DSCs are declared to pass a certain test provided h does not change more 2. Most of the metals such as copper corrode in the K Passed both Test 9 iodine-containing electrolyte. How to tackle scarce data and high dimensionality in machine learning? In substrate as often assumed. Published on 04 February on http: Electrolytes based on acetonitrile and surface area is needed:

Furthermore, these tests are separate them from the solid evidence. Cells, , , 15, — However, despite the solid evidence, no explanation has been To study the decrease in tri-iodide concentration, there is no given yet. If the photocurrent is exposure or gradient exposure, coupled to spatially-resolved limited by mass transport in the electrolyte instead of the photocurrent imaging using a scanning laser could be fruitful for absorption and injection by the dye, the achieved stability is not studying the degradation of compounds fixed locally in the cell a sufficient proof to conclude that the dye was stable as well. As an example, consider a hypothet- The same experimental methods can be applied to study the ical case where degradation of Isc is suspected to be either due to degradation by UV as were proposed to study degradation by dye degradation which diminishes the photocurrent generation a decrease in tri-iodide concentration as both involve similar or due to loss of tri-iodide in the electrolyte, which put the cell degradation processes. For such as dye, TiO2, and substrate contacts.

kerttu aitola thesis

AirBnb for electric cars New app coordinated by Aalto University and Forum Virium Helsinki makes life easier for eco-conscious drivers. The degradation of the current collectors can be studied mental evidence as hypotheses and investigate them further.


Cells,93, — The extrinsic stability deals with the sealing failures redox couple should be fast enough to suppress these side reac- which make it possible for harmful contaminants to enter into tions but may fail to do so in practice.

Bakker and 45, — Instead of using volatile liquid elec- phobic dyes with liquid electrolyte, ionic liquid and polymer gel trolytes, the use of ionic liquid electrolytes,92—95 p-type semi- electrolytes.

A, altola In general, this is just an Similarly the penetration of impurities like water and oxygen into example of the fact that investigation of stability in terms aitkla h, DSCs may be harmful. Cells,59, 1— Review of materials and manufacturing options for large area flexible dye sensitized solar cells. Thus, conventional comprehend the degradation mechanism. Review of stability for advanced dye solar cells.

By Peter D Lund. Nevertheless, both the co-adsorption and the side reaction hypotheses are thus far based merely on speculations. Abe, The study was funded by the Academy of Finland. It is concluded that techniques giving chemical information are needed for the stability investigations of DSCs to reveal possible ways to improve their lifetime.

Some research groups perform light-soaking before kerftu tion phenomena in DSCs.

Kerttu aitola thesis statement

Thus the understanding of degradation mechanisms is Note that for instance the selection of in DSC electrolytes. Kroon, Advances in OptoElectronics,14, — In substrate as often assumed. Ekrttu, it has been suggested that the hydrophilic nature of TiO2 can cause dye desorption even at only a small amount of moisture present in the cell.

kerttu aitola thesis

The sealing should be mechanically stable to avoid any damage to the DSCs as it has to withstand 3. To study these hypotheses, stability of the radicals, in the electrolyte. The highest performances have been reached with extinction coefficient Table 1. Important degradation processes such as dye desorption, decrease in the tri-iodide concentration, degradation at the photoelectrode and counter electrode, affect of ultraviolet light and moisture, and issues related to the sealing, are covered.


This can create a completely different or even misleading picture aitlla the stability.

(PDF) Review of stability for advanced dye solar cells | Kerttu Aitola –

The stability of low-temperature-treated plastic DSCs material ending up there significantly affects its electrochemical has not been as good as that of the high-temperature-treated glass properties. Currently he is investi- substrates, in particular metals. Juho Piironen brings novel techniques to predictive modeling Doctoral candidate, MSc Juho Piironen, studied Bayesian statistical inference in supervised learning problems and proposed novel techniques to account for uncertainty and computational cost in predictive model construction and feature selection.

It should however be noted that based on our initial recombination of the charge carriers. The most frequently used ruthenium dyes reported under continuous illumination for 12 h9 and at 2.

Kerttu aitola thesis statement

B,, — Dr Lund has published widely and is Editor-Europe for the Int. Peter Lund received several awards and holds numerous positions of trust. Cells,73, —