Julie Dréon
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View article: Loss Analysis of a 24.4%-Efficient Front-Junction Silicon Heterojunction Solar Cell and Opportunity for Localized Contacts
Loss Analysis of a 24.4%-Efficient Front-Junction Silicon Heterojunction Solar Cell and Opportunity for Localized Contacts Open
Silicon heterojunction (SHJ) solar cells have recently reached power conversion efficiencies above 25% with various device architectures and with industrial size (>200 cm(2)) wafers. Yet, for an accurate assessment of the efficiency potent…
View article: Carrier‐selective contacts using metal compounds for crystalline silicon solar cells
Carrier‐selective contacts using metal compounds for crystalline silicon solar cells Open
Solar cells rely on the efficient generation of electrons and holes and the subsequent collection of these photoexcited charge carriers at spatially separated electrodes. High wafer quality is now commonplace for crystalline silicon ( c ‐S…
View article: Contact resistivity measurements and their applicability for accurate series resistance breakdown in heterojunction solar cell
Contact resistivity measurements and their applicability for accurate series resistance breakdown in heterojunction solar cell Open
In this work, we use several approaches to perform accurate Series Resistance (R-S) breakdown of a state of the art 2 cm x 2 cm screen-printed solar cell reaching 82.5% FF. On the one hand, Haschke et al.'s model for the lateral transport …
View article: Temperature‐dependent performance of silicon heterojunction solar cells with transition‐metal‐oxide‐based selective contacts
Temperature‐dependent performance of silicon heterojunction solar cells with transition‐metal‐oxide‐based selective contacts Open
The temperature coefficient (TC) is an essential figure of merit to accurately evaluate solar cell performance at various operating temperatures and hence enabling the comparison between different cell technologies. Recently, solar cells t…
View article: Effects of Work Function and Electron Affinity on the Performance of Carrier-Selective Contacts in Silicon Solar Cells Using ZnSn<sub>$_\text{} x $</sub> Ge<sub>$_\text{} 1-x $</sub>N$_\text{2}$ as a Case Study
Effects of Work Function and Electron Affinity on the Performance of Carrier-Selective Contacts in Silicon Solar Cells Using ZnSn<sub>$_\text{} x $</sub> Ge<sub>$_\text{} 1-x $</sub>N$_\text{2}$ as a Case Study Open
This work reports the electrical characterization of ZnSnx Ge1 - xN2 (ZTGN) layers (10% < x < 90%) deposited on glass by combinatorial sputtering and further assesses the performance of silicon heterojunction (SHJ) solar cells featuring th…
View article: ZnSn<sub>x</sub>Ge<sub>1-x</sub>N<sub>2</sub> as electron-selective contact for silicon heterojunction solar cells
ZnSn<sub>x</sub>Ge<sub>1-x</sub>N<sub>2</sub> as electron-selective contact for silicon heterojunction solar cells Open
This work reports the electrical characterization of ZnSnxGe1-xN2 (ZTGN) layers deposited on glass by sputtering and further assesses for the first time the performance of SHJ solar cells featuring them as electron-selective contacts. Band…
View article: Performance Limitations and Analysis of Silicon Heterojunction Solar Cells Using Ultra-Thin MoO<sub>x</sub>Hole-Selective Contacts
Performance Limitations and Analysis of Silicon Heterojunction Solar Cells Using Ultra-Thin MoO<sub>x</sub>Hole-Selective Contacts Open
We recently showed that silicon heterojunction solar cell with MoOx-based hole-selective contact could reach 23.5% in efficiency with MoOx layers of 4 nm. Such thin MoOx layer enables a considerable current-density gain of over 1 mA/cm(2) …
View article: Influence of the Dopant Gas Precursor in P-Type Nanocrystalline Silicon Layers on the Performance of Front Junction Heterojunction Solar Cells
Influence of the Dopant Gas Precursor in P-Type Nanocrystalline Silicon Layers on the Performance of Front Junction Heterojunction Solar Cells Open
Silicon heterojunction solar cells can employ p-type hydrogenated nanocrystalline silicon nc-Si:H(p) on their front side, since these can provide better transparency and contact resistance compared to hydrogenated p-type amorphous silicon …
View article: Dopant‐Free Bifacial Silicon Solar Cells
Dopant‐Free Bifacial Silicon Solar Cells Open
Herein, challenges in the fabrication of full dopant‐free bifacial silicon solar cells are discussed and efficient devices utilizing a MoO 3 / indium tin oxide (ITO)/Ag hole‐selective contact and ZnO/LiF x /Al electron‐selective contacts w…
View article: Degradation Mechanism and Stability Improvement of Dopant-Free ZnO/LiF<i><sub>x</sub></i>/Al Electron Nanocontacts in Silicon Heterojunction Solar Cells
Degradation Mechanism and Stability Improvement of Dopant-Free ZnO/LiF<i><sub>x</sub></i>/Al Electron Nanocontacts in Silicon Heterojunction Solar Cells Open
Dopant-free passivating contacts for photovoltaics have the potential to be deposited at low costs, while providing excellent surface passivation and low contact resistance. However, one pressing issue of dopant-free carrier selective cont…
View article: Hole-Selective Front Contact Stack Enabling 24.1%-Efficient Silicon Heterojunction Solar Cells
Hole-Selective Front Contact Stack Enabling 24.1%-Efficient Silicon Heterojunction Solar Cells Open
The window-layer stack limits the efficiency of both-side-contacted silicon heterojunction solar cells. We discuss here the combination of several modifications to this stack to improve its optoelectronic performance. These include the int…
View article: Mitigating Plasmonic Absorption Losses at Rear Electrodes in High‐Efficiency Silicon Solar Cells Using Dopant‐Free Contact Stacks
Mitigating Plasmonic Absorption Losses at Rear Electrodes in High‐Efficiency Silicon Solar Cells Using Dopant‐Free Contact Stacks Open
Although charge‐carrier selectivity in conventional crystalline silicon (c‐Si) solar cells is usually realized by doping Si, the presence of dopants imposes inherent performance limitations due to parasitic absorption and carrier recombina…
View article: Paths for maximal light incoupling and excellent electrical performances in silicon heterojunction solar cells
Paths for maximal light incoupling and excellent electrical performances in silicon heterojunction solar cells Open
We discuss here optical losses in silicon heterojunction solar cells and strategies to minimize them. Optical losses originate from most non-crystalline-silicon layers involved in the solar cell. A breakdown for typical values is shown evi…
View article: Toward Annealing‐Stable Molybdenum‐Oxide‐Based Hole‐Selective Contacts For Silicon Photovoltaics
Toward Annealing‐Stable Molybdenum‐Oxide‐Based Hole‐Selective Contacts For Silicon Photovoltaics Open
Molybdenum oxide (MoO X ) combines a high work function with broadband optical transparency. Sandwiched between a hydrogenated intrinsic amorphous silicon passivation layer and a transparent conductive oxide, this material allows a highly …
View article: Moox And Wox Based Hole-Selective Contacts For Wafer-Based Si Solar Cells
Moox And Wox Based Hole-Selective Contacts For Wafer-Based Si Solar Cells Open
Highly-transparent carrier-selective front contacts open a pathway towards entirely dopant free Si solar cells. Hole selective a-Si:H/MoOx/ITO front contact stacks were already successfully applied in such novel devices. However, for optim…