Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"voltage losses"”.
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Low platinum loading electrospun electrodes for proton exchange membrane fuel cells
… due to high activation and concentration voltage losses. Cyclic voltammetry and rotating disc electrode experiments were performed in order to evaluate the influence of platinum loading and particle size on the electrochemical active area and oxygen reduction performance of the sputtered …
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Removing the Spin-Triplet Loss Pathway in Organic Solar Cells: A Strategy to Enhance Radiative Efficiency and Minimise Energy Loss
… As the ideal solar cell would have only voltage loss resulting from the radiative recombination of charge carriers, we aim to decrease the magnitude of the non-radiative voltage losses in organic solar cells. In this work, we present two distinct strategies to achieve this: i. The kinetic …
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Charge carrier recombination and open circuit voltage in organic solar cells
… solar cells exists nowadays, their open circuit voltage is usually low compared to the band-gap of the active layer. Hence, organic low band-gap solar cells in particular show low open circuit voltages and the key factors that determine the voltage losses are not yet fully understood. Besides …
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Investigating the Photophysics of New and Stable Singlet Fission Materials
… the efficiency of solar cells by reducing losses to thermalisation. Consequently, new singlet fission materials, particularly those with better photostability, are of great interest. We have drawn our conclusions by studying three novel singlet fission systems: …
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Photophysical Studies of Active Layer Compositions in Organic Solar Cells
… triplet states which contribute to non-radiative voltage losses and limit charge extraction in working solar cells. We finally propose integrating photon upconversion via triplet-triplet annihilation (TTA-UC) into an OSC to recycle the low-energy triplets. This should effectively give these …