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- W1965819790 abstract "Abstract We have recently introduced an improved QSS-μPCD lifetime measurement with a strict quality of decay control technique. This enabled unified, parameter free determination of the decay lifetime and the steady-state lifetime over a broad steady-state injection range (up to about 30suns). Excellent correlation was found with Sinton QSSPC measurement. The advantage of spatially resolved μPCD was applied for wafer mapping. Emitter saturation current, J0, mapping was obtained directly from small perturbation decay lifetime using the Basore-Hansen procedure. The maps revealed commonly present passivation defects manifested as high J0 areas.In this work we report further improvement of the approach, especially regarding speed and resolution. Our research involved photoluminescence measurements on passivated test wafers in sequence with the QSS-μPCD unified lifetime measurement including J0. On selected sites the value of J0 was intentionally varied with corona charge induced field-effect. This enabled a unique PL calibration to J0 and other recombination parameters. Quantitative characteristics enabled us to compare PL procedures for the determination of J0 and to select a practical version for J0 imaging that uses direct J0 determination from the ratio of generation rate G to PL intensity. We have found that this J0 procedure correlates well with the commonly used Kane-Swanson method. In addition, it carries the practical advantages of needing only a single PL image with a straightforward calibration and relaxed requirements regarding injection range restriction." @default.
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- W1965819790 date "2013-01-01" @default.
- W1965819790 modified "2023-09-27" @default.
- W1965819790 title "Unified Lifetime Metrology and Photoluminescence Imaging of Passivation Defects for Silicon PV" @default.
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- W1965819790 doi "https://doi.org/10.1016/j.egypro.2013.07.269" @default.
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