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- W3122065986 abstract "Hydrogenated nanocrystalline silicon (nc‐Si:H) or hydrogenated nanocrystalline silicon oxide (nc‐SiO x :H) as window layers have ample potential to improve the short‐circuit current density ( J SC ) of silicon heterojunction (SHJ) solar cells due to their wide optical bandgap. However, the growth of their nanocrystals within a 20 nm‐thickness on intrinsic hydrogenated amorphous silicon ( i ‐a‐Si:H) poses a challenge. Plasma treatment (PT) after i ‐a‐Si:H deposition is usually used to improve passivation performance. Herein, the i / p interface is subjected to CO 2 PT: a 20 s post CO 2 PT is proven to be beneficial in obtaining improved passivation performance. This can be achieved by activated hydrogen which can be diffused to the wafer surface and can saturate the dangling bonds on it. Extending the CO 2 PT time from 20 to 40 s, the oxygen (O) insertion into i ‐a‐Si:H starts to increase slowly, which leads to marginal change of microstructure in the p layer. Strained SiSi bonds by oxygen incorporation into the a‐Si:H network generate nucleation sites and consequently accelerate the nucleation of p ‐nc‐Si:H on i ‐a‐Si:H. Finally, it is demonstrated that the power conversion efficiency (PCE) of planar SHJ solar cells is enhanced from 12.65% to 19.06% by a 20 s CO 2 PT at the i / p interface." @default.
- W3122065986 created "2021-02-01" @default.
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- W3122065986 date "2021-02-10" @default.
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- W3122065986 title "Bifunctional CO <sub>2</sub> Plasma Treatment at the <i>i</i> / <i>p</i> Interface Enhancing the Performance of Planar Silicon Heterojunction Solar Cells" @default.
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- W3122065986 doi "https://doi.org/10.1002/pssr.202100010" @default.
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