Benjamin Hammann
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View article: Manifestation of Light‐ and Elevated‐Temperature‐Induced Degradation in <i>n</i> ‐Type Silicon: Initial Lifetime Improvement Due to Temporary Recovery
Manifestation of Light‐ and Elevated‐Temperature‐Induced Degradation in <i>n</i> ‐Type Silicon: Initial Lifetime Improvement Due to Temporary Recovery Open
Light‐ and elevated‐temperature‐induced degradation (LeTID) has been the most discussed degradation phenomenon during the late p ‐type passivated emitter and rear cell (PERC) era. It is important to investigate whether similar issues affec…
View article: Review on hydrogen in silicon solar cells: From its origin to its detrimental effects
Review on hydrogen in silicon solar cells: From its origin to its detrimental effects Open
In this work, we present an overview of the current understanding of hydrogen in modern silicon solar cells. The ambivalent nature of hydrogen poses a significant challenge for solar cells: While hydrogen is highly beneficial due to the pa…
View article: Deciphering the Role of Hydrogen in the Degradation of Silicon Solar Cells under Light and Elevated Temperature
Deciphering the Role of Hydrogen in the Degradation of Silicon Solar Cells under Light and Elevated Temperature Open
In recent years, significant attention has been paid to the research of light‐ and elevated‐temperature‐induced degradation (LeTID) in silicon solar cells due to the substantial power loss and instability it causes. It has been discovered …
View article: Doping dependence of boron–hydrogen dynamics in crystalline silicon
Doping dependence of boron–hydrogen dynamics in crystalline silicon Open
In this contribution, we investigate the formation and dissociation of boron–hydrogen (BH) pairs in crystalline silicon under thermal equilibrium conditions. Our samples span doping concentrations of nearly two orders of magnitude and are …
View article: Reducing Time and Costs of FT-IR Studies of the Effect of SiNx, Dopants, and Emitter on Hydrogen Species in Si Wafers and Solar Cell Structures
Reducing Time and Costs of FT-IR Studies of the Effect of SiNx, Dopants, and Emitter on Hydrogen Species in Si Wafers and Solar Cell Structures Open
Accurately measuring the hydrogen content in silicon (Si) solar cells is essential due to its connection to surface degradation and light and elevated temperature induced degradation (LeTID). Fourier Transform-Infrared (FT-IR) spectroscopy…
View article: Quantifying Surface Recombination—Improvements in Determination and Simulation of the Surface Recombination Parameter <i>J</i> <sub>0</sub> <i> <sub>s</sub> </i>
Quantifying Surface Recombination—Improvements in Determination and Simulation of the Surface Recombination Parameter <i>J</i> <sub>0</sub> <i> <sub>s</sub> </i> Open
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View article: The Impact of Different Hydrogen Configurations on Light- and Elevated-Temperature- Induced Degradation
The Impact of Different Hydrogen Configurations on Light- and Elevated-Temperature- Induced Degradation Open
In this article, the impact of different hydrogen configurations and their evolution on the extent and kinetics of light- and elevated-temperature-induced degradation (LeTID) is investigated in float-zone silicon via charge carrier lifetim…
View article: Hydrogen Reactions in c‐Si:B During Illumination at Room Temperature
Hydrogen Reactions in c‐Si:B During Illumination at Room Temperature Open
Herein, effects related to reactions involving hydrogen during carrier injection at room temperature in boron‐doped Czochralski‐grown silicon wafers are investigated. It is shown that these conditions lead to boron–oxygen defect regenerati…
View article: Identification of the LeTID defect formation as a hydrogen-related dissociation process
Identification of the LeTID defect formation as a hydrogen-related dissociation process Open
We investigate possible correlations between the temporal evolution of Light and elevated Temperature Induced Degradation (LeTID) and of boron-hydrogen pairs. For this, samples were treated under dark annealing conditions at 160°C and the …
View article: Insights into the Hydrogen‐Related Mechanism behind Defect Formation during Light‐ and Elevated‐Temperature‐Induced Degradation
Insights into the Hydrogen‐Related Mechanism behind Defect Formation during Light‐ and Elevated‐Temperature‐Induced Degradation Open
By investigating the formation of light‐ and elevated‐temperature‐induced degradation (LeTID) defects under dark annealing conditions alongside the formation of the boron–hydrogen complex, it is found that both formations are limited by pr…