Concluding remarks: emerging inorganic materials in thin-film photovoltaics

Walsh, Aron

doi:10.1039/d2fd00135g

Cited by 3 publications

(1 citation statement)

References 25 publications

(39 reference statements)

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“…An ultra-thin molecular or polymeric dipole layer has the capability to alter the contact behaviour with shifts on the order of electron volts. 45 This has been studied extensively for use in organic PV, and is currently employed in state-of-the-art perovskite/silicon tandem solar cells. 8,9 Alternatively, one could consider replacing ITO with another recombination layer, such as Zn-MgO:Al, which may be deposited while maintaining the substrate at room temperature without compromising conductivity.…”

Section: Resultsmentioning

confidence: 99%

Selenium Thin-Film Solar Cells with Cadmium Sulfide as a Heterojunction Partner

Nielsen

Youngman

Crovetto

et al. 2021

ACS Appl. Energy Mater.

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Elemental selenium (Se) is experiencing a renaissance as a p-type direct wide bandgap (1.95 eV) photoabsorber, appropriate for integration with lower bandgap materials in tandem photovoltaic devices. However, single-junction selenium devices are typically in the superstrate configuration with the charge-separating p–n junction located very close to the substrate. For tandem devices, the p–n junction should ideally lie near the surface of the cell to maximize photocarrier collection, implying that the n-type heterojunction partner should be deposited on top of Se. Since Se is a soft, low-melting-point material, a low-damage deposition technique should then be identified for the partner material. Here, we investigate the suitability of CdS grown by chemical bath deposition as an n-type partner for Se cells. We demonstrate the first functioning CdS/Se solar cell in the standard superstrate configuration. Although it may be possible to realize a substrate configuration, we find that the bandgap and electron affinity of CdS are not optimal for efficient carrier absorption and transport in selenium devices, suggesting that CdS is a poor partner for selenium.

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Section: Resultsmentioning

confidence: 99%

Selenium Thin-Film Solar Cells with Cadmium Sulfide as a Heterojunction Partner

Nielsen

Youngman

Crovetto

et al. 2021

ACS Appl. Energy Mater.

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Bayesian optimization approach to quantify the effect of input parameter uncertainty on predictions of numerical physics simulations

McCallum,

Lerpinière,

Jensen

et al. 2023

APL Machine Learning

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An understanding of how input parameter uncertainty in the numerical simulation of physical models leads to simulation output uncertainty is a challenging task. Common methods for quantifying output uncertainty, such as performing a grid or random search over the model input space, are computationally intractable for a large number of input parameters represented by a high-dimensional input space. It is, therefore, generally unclear as to whether a numerical simulation can reproduce a particular outcome (e.g., a set of experimental results) with a plausible set of model input parameters. Here, we present a method for efficiently searching the input space using Bayesian optimization to minimize the difference between the simulation output and a set of experimental results. Our method allows explicit evaluation of the probability that the simulation can reproduce the measured experimental results in the region of input space defined by the uncertainty in each input parameter. We apply this method to the simulation of charge-carrier dynamics in the perovskite semiconductor methyl-ammonium lead iodide (MAPbI3), which has attracted attention as a light harvesting material in solar cells. From our analysis, we conclude that the formation of large polarons, quasiparticles created by the coupling of excess electrons or holes with ionic vibrations, cannot explain the experimentally observed temperature dependence of electron mobility.

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