Solution of efficiency loss in thinned silicon PERC solar cells

AbstractMulticrystalline Si wafers used in commercial solar cell fabrication exhibit a tendency to form large “clusters” of defects, which remain laterally separated from each other. Defect clusters are also sites of impurity precipitation. Because precipitated impurities cannot be gettered by the conventional processes used in Si solar cell fabrication, defect clusters constitute low-performing regions in the cell. They shunt the device and constitute the primary efficiency limiting mechanism in current solar cells. We show that the efficiency loss caused by defect clusters can exceed 3–4 absolute points.

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Identifying and comparing efficiency-loss mechanisms in earth-abundant thin-film solar cells

2013 IEEE 39th Photovoltaic Specialists Conference (PVSC) ◽

10.1109/pvsc.2013.6744277 ◽

2013 ◽

Cited By ~ 1

Author(s):

Riley E. Brandt ◽

Michael Lloyd ◽

Yun S. Lee ◽

Sin Cheng Siah ◽

Tonio Buonassisi

Keyword(s):

Thin Film ◽

Solar Cells ◽

Thin Film Solar Cells ◽

Efficiency Loss ◽

Earth Abundant ◽

Loss Mechanisms

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Molecular design and synthesis of D–π–A structured porphyrin dyes with various acceptor units for dye-sensitized solar cells

Journal of Materials Chemistry C ◽

10.1039/c8tc05283b ◽

2019 ◽

Vol 7 (10) ◽

pp. 2843-2852 ◽

Cited By ~ 25

Author(s):

Haoran Zhou ◽

Jung-Min Ji ◽

Sung Ho Kang ◽

Min Su Kim ◽

Hyun Seok Lee ◽

...

Keyword(s):

Solar Cells ◽

Recombination Rate ◽

Molecular Design ◽

Dye Sensitized Solar Cells ◽

Charge Recombination ◽

Efficiency Loss ◽

Design And Synthesis ◽

Dye Sensitized ◽

Adsorption Mode ◽

Sensitized Solar Cells

The large efficiency loss for the SGT-023-based device with a stronger electron-withdrawing pyridothiadiazole unit could be ascribed to a fast charge recombination rate caused by the tilted adsorption mode on the TiO2 surface.

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Surface & grain boundary co-passivation by fluorocarbon based bifunctional molecules for perovskite solar cells with efficiency over 21%

Journal of Materials Chemistry A ◽

10.1039/c8ta11524a ◽

2019 ◽

Vol 7 (6) ◽

pp. 2497-2506 ◽

Cited By ~ 51

Author(s):

Pengfei Guo ◽

Qian Ye ◽

Xiaokun Yang ◽

Jin Zhang ◽

Fei Xu ◽

...

Keyword(s):

Solar Cells ◽

Grain Boundary ◽

Perovskite Solar Cells ◽

Effective Strategy ◽

Efficiency Loss ◽

Bifunctional Molecules ◽

Improved Stability

An effective strategy of surface & grain boundary co-passivation is demonstrated to access perovskite solar cells with 21.31% champion efficiency as well as a highly improved stability of less than 3% efficiency loss after 2500 hours at a humidity of 70%.

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